1. X. An and K.H.Li, GaN-Based Integrated Optical Devices for Wide-Scenario Sensing Applications, in Nanoelectronic Devices and Application, edited by Trupti RanjanLenka and Hieu Pham Trung Nguyen, BenthamScience, ISBN: 978-981-5238-25-9, (2024).
2. K.H. Li and H.W. Choi, "Photonic Crystal Light-Emitting Diodes by Nanosphere Lithography", in 'Handbook of Solid-state Lighting and LEDs", edited by Z.C. Feng, Taylor and Francis, ISBN 9781498741415, (2017).
3. K.H. Li, "Nanostructuring for Nitride Light-emitting Diodes and Optical Cavities", Springer Theses, Springer Publishing, ISBN: 978-3-662-48609-2, (2015).
4. K.H. Li and H.W. Choi, "Nanosphere-patterned Gallium Nitride Optical Microcavities", in "Handbook of Optical Microcavities", edited by H.W. Choi, Pan Stanford Publishing, ISBN 978-9-81446-324-9, (2014).

Granted

1. K.H. Li, Z. Chu, L. Chen,and J. Jing, Monolithic integrated chip and application thereof, CN Patent CN113594104B, (2024).
2. K.H. Li, Y. Luo,and L. Chen, Flow velocitydetection device, method and system, CN Patent CN113985064B, (2023).
3. K.H. Li and L. Chen, A heartrate detection chip, its preparation method and wearable device, CN Patent CN111668213B, (2023).
4. H.W. Choi, K.H. Li, and Y.F. Cheung, Flexible GaN Light-emitting Diodes, US Patent 62/040,253, US20160233269A1, (2021).
5. H.W. Choi, K.H. Li, and H. Lu, The light emitting diode (LED) of Real-time intensity monitoring in situ is used for single chip integrated photoelectric detector, CN109478533A, (2020).

Pending

1. K.H. Li and H. Yang, A monolithic integratedoptoelectronic chip and its preparation method and a method for measuring the surface temperature of a battery, CN Patent Application CN119008651A, (2024).
2. Z. Liu, X. Guan, and K.H. Li, Pressure sensor based on monolithically integrated gallium nitride photoelectric device, CN Patent Application CN118576168A, (2024).
3. Z. Liu, X. Guan, and K.H. Li, Blood pressure prediction methodbased on machine learning, CN Patent Application CN118370524A, (2024).
4. Z. Chu, T. Zhang, Q. Wang, Z. Wang, and K.H. Li, Scalable method for achieving shape control of diamond micro-nanoparticles, USPatent Application US20240240311A1, (2024).
5. Z. Chu, Y. Luo, and K.H.Li, Opto chip-based viscometer, US Patent Application US20240295482A1, (2024).
6. Z. Chu, Y. Luo, and K.H. Li, Optical chip, viscometer and detection method, CN Patent Application CN118583820A, (2023).
7. Z. Chu, T. Zhang, Q. Wang, Z. Wang, and K.H. Li, Method for adjusting and controlling shape of diamond micro-nano particles in large scale CN Patent Application CN118359194A, (2023).
8. K.H. Li, G. Fan, and B. Yu, Vacuum pressure measuring device, method and system, CN Patent Application CN115452236A, (2022).
9. K.H. Li, B. Yu, and J. Li, Miniature sensor for liquid pressure measurement and pollution monitoring and manufacturing method thereof, CN Patent Application CN115235534A, (2022).
10. K.H. Li, X. An, J. Yin, and H. Yang, Miniature optical angle sensor and electronic equipment, CN Patent Application CN114234925A, (2022).
11. K.H. Li and X. An, Object recognition system, method and storage medium, CN Patent Application CN114119945A, (2022).
12. L. Zhu, Y. Wu, K.H. Li, T. Chen, and W. Wang, Health monitoring module, CN113782562A, (2021).

1. J. Jing^#, F. Sun^#, Z. Wang, L. Ma, Y. Luo, Z. Du, T. Zhang, Y. Wang, F. Xu, X. Ma, X.Wang, Y. Zhou, J.K.H. Tsoi, J. Wrachtrup, N. Wong, C. Li, D.-K. Ki, Q. Wang*, K.H. Li*, Y. Lin*, and Z. Chu*
   Scalable production of ultraflat and ultraflexible diamond membrane
   Nature In Press (2024).
2. X. An, S. Gui, Y. Li, Z.Chu*, and K.H. Li*
   A versatile optoelectronic device for ultrasensitive negative-positive pressure
   sensing
   Chip InPress (2024).
3. T. Zhang, F. Sun, Y. Wang,Y. Li, J. Wang, Z. Wang, K.H. Li, Y. Zhu, Q. Wang, L. Shao, N. Wong, D.Lei, Yuan Lin*, and Z. Chu*
   Scalable Reshaping of Diamond Particles via Programmable Nanosculpting
   ACS Nano, In Press (2024).
4. T. Ye^#, J. Chen^#, X. Tang, and K.H. Li*
   Biomimetic Hair-Assisted GaN Optical Devices for Bidirectional Airflow
   Detection
   Microsystems & Nanoengineering 10(1), 166 (2024).
5. L. Pan, S. Li, J. Chen, M. Luo, L. Zhang, L.Huang, K.H. Li*, X.Tang*
   Miniaturized GaN-Based Hydrophones for Underwater Low-Frequency Acoustic
   Detection
   IEEE Photonics Technology Letters 36(20), 1237-1240 (2024).
6. G. Lu, Y. Wang, J. Chen, X.An, J. Jing, Y. Chai*, Z. Chu*, and K.H. Li*
   Rapid, Non-Contact Identification of Organic Solvents: Monolithic GaN Chips
   Incorporating PDMS/PS Photonic Crystals
   Sensors and Actuators B: Chemical 420, 136511 (2024).
7. Z. Liu^#, T. Chen^#, L. Zhu*, X. Guan*, and K.H. Li*
   Magnet-Assisted GaN Monolithically Integrated Device for Optical Three-Axis
   Motion Sensing
   ACS Photonics 11(9), 3750-3757 (2024).
8. S. Gui, B. Yu, Y. Luo, L.Chen, and K.H. Li*
   Rapid-Response, Low-Detection-Limit, Positive-Negative Air Pressure Sensing:
   GaN Chips Integrated with Hydrophobic PDMS Films
   Microsystems & Nanoengineering 10(1), 162 (2024).
9. T. Chen^#, R. Huang^#, L. Zhu*, and K.H. Li*
   III-Nitride Optochip-in-Sphere for Dual-Axis Angle Detection
   IEEE Electron Device Letters 45(8), 1516-1519 (2024). (Selected as the Editors' Pick)
10. J.Chen, H. Yang, Y. Luo, G. Lu, Z. Chen, X. Tang, and K.H. Li*
    III-Nitride TurbidityMicrosensor Withan UltrawideMeasurement Range
    IEEE Sensors Journal 24(12), 19033-19038 (2024).
11. Y. Luo, B. Yu, H. Yu, and K.H.Li*
    GaN integrated optical devices for glycerol viscosity measurement
    Optics Letters 49(9), 2261-2264 (2024).
12. G. Lu, J. Chen, Y. Chai*, and K.H.Li*
    GaN Optical Devices Integrated with Sol-Gel Films for pH Detection
    IEEE Transactions onElectron Devices 71(2), 1226-1230 (2024).
13. J. Yin, Y. Luo, L. Chen, Q. Wang, H.Yu, and K.H. Li*
    High-Resolution Optical Three-Axis Tactile Microsensor Based on III-Nitride
    Devices with Integrated PDMS Bumps
    IEEE Electron DeviceLetters 44(12), 2035-2038 (2023).
14. L. Zhu, Z. He, J. Zhan, J. Chen, and K.H. Li*
    PDMS-assisted GaN optical hardness sensors
    Optics Letters 48(21), 5631-5634 (2023).
15. Z. Liu, J. Su, K. Zhou, B. Yu, Y. Lin*,and K.H. Li*
    Fully Integrated Patch Based on Lamellar Porous Film Assisted GaN Optopairs for
    Wireless Intelligent Respiratory Monitoring
    Nano Letters 23(23), 10674-10681 (2023). (Selected as the front cover)
16. J. Zhan, L. Zhu, Z. He, J. Chen, L. Chen and K.H. Li*
    Impact Force Sensors Based on GaN Optical Devices with Micropatterned PDMS Sponges
    IEEE Sensors Journal, accepted (2023).
17. J. Yin, B. Yu, Y. Luo, Q. Wang, H. Yu, and K.H. Li*
    Optomechanical Switches and Logic Gate Functions based on GaN-on-Sapphire
    Devices Integrated with PDMS Membranes
    IEEE Electron Device Letters, 44(7), 1192-1195 (2023).
18. T. Chen, L. Zhu, J. Chen, X. Tang, and K.H. Li*
    Opticalmillinewton force sensors based on GaN devices integrated with
    bionic-structured PMDS films
    IEEE Transactions on Electron Devices, 70(7), 3828-3832 (2023).
19. T.T. Zhang, L.Z. Wang, J. Wang, Z. Q. Wang, M. Gupta, X.Y. Guo, Y. Zhu, Y.C. Yiu, T. K.C. Hui, Y. Zhou, C. Li, D.Y. Lei, K.H. Li, X.Q. Wang, Q. Wang*, L. Shao*, and Z.Q. Chu*
    Multimodal, dynamic, and unclonable anti-counterfeiting using robust diamond microparticles on heterogeneous substrate
    Nature Communications, 14(1), 2507 (2023).
20. J. Chen, L. Zhu, X. Tang*, and K.H. Li*
    Optical magnetic field microsensors based on GaN diode optopairs integrated with magnetic fluids
    Journal of Lightwave Technology, 41(15), 5153-5158 (2023).
21. J. Wang, J. Zheng, K.H. Li, J. Wang, H. Lin, and L. Shao*
    Excitation of Chiral Cavity Plasmon Resonances in Film-Coupled Chiral Au Nanoparticles
    Advanced Optical Materials, 2202865 (2023).
22. J. Zhang, H. He, T. Zhang, L. Wang, M. Gupta, J. Jing, Z. Wang, Q. Wang, K.H. Li, K.K.Y. Wong*, and Z. Chu*
    Two-photon Excitation of Silicon Vacancy Centers in Nanodiamonds for All-optical Thermometry with a Noise Floor of 6.6 mK·Hz-1/2
    The Journal of Physical Chemistry C,127(6), 3013-3019 (2023). (Selected as Cover Story)
23. F. Geng^#, B. Yu^#, and K.H. Li*
    Fast response PDMS/GaN Optical Vacuum Microsensors
    IEEE Electron Device Letters, 44(2),310-304 (2023).
24. Y. Luo, G. Lu, Q. Wang, Z. Chu, and K.H. Li*,
    Miniature viscometer incorporating GaN optical devices with an ultrawidemeasurement range
    Light: Advanced Manufacturing, 4(2) (2023). (Featured by Phys.org and EurekAlert)
25. H. Yang, Y. Luo, G. Lu, Y. Chai*, Z. Chu*, and K.H. Li*
    Viscosity sensors based on III-nitride optical devices integrated with droplet sliding channels
    IEEE Electron Device Letters, vol. 43(12), 2169-2172 (2022). (Selected as the Editors' Pick)
26. B. Yu, Y. Luo, J. Li, H. Ye, and K.H. Li*
    Interface engineering in chip-scale GaN optical devices for near-hysteresis-free hydraulic pressure sensing
    ACS Applied Materials & Interfaces, 14(33), 38351–38357 (2022).
27. H. Yang^#, X. An^#, Y. Luo, L. Chen, and K.H. Li*
    Investigation of the Angle-detecting Mechanism of GaN-based Optical Devices Incorporating Liquid Pendulums
    IEEE Sensors Letters, 6, 3501904 (2022).
28. X. An, H. Yang, Y. Luo, Z. Chu*, and K.H. Li*
    An Ultrafast Miniaturized GaN-based Optoelectronic Proximity Sensor
    Photonic Research 10, 1964-1970 (2022).
29. T. Zhang, M. Gupta, J. Jing, Z. Wang, Q. Wang*, K.H. Li*, and Z. Chu*
    High-Quality Diamond Microparticles Containing SiV Centers Grown by Chemical Vapor Deposition with Preselected Seeds
    Journal of Materials Chemistry C DOI: 10.1039/d2tc01090a, (2022). (Selected as the inside front cover)
30. Y. Hou, J. Jing, Y. Luo, Feng Xu, W. Xie, L. Ma, X. Xia, Q. Wei, Y. Lin*, K.H. Li*, and Z. Chu*
    A Versatile, Incubator-Compatible, Monolithic GaN Photonic Chipscope for Label-Free Monitoring of Live Cell Activities
    Advanced Science 2200910, (2022). (This work is reported by media including DeepTech, Mirage News, Phys.org, Verve Times, Bioengineer.org, Nano Werk, Eurekalert!, Sky News, AZoOptics, Scienmag, Nixolympia News, Open Gov Asia, Sohu, thepaper.cn Hong Kong Economic Times, Wen Wei Po, Ta Kung Pao, Sing Pao Daily, Bastille Post.)
31. J. Jing, Y. Hou, Y. Luo, L. Chen, L. Ma, Y. Lin, K.H. Li*, and Z. Chu*
    Chip-scale in-situ salinity sensing based on a monolithic optoelectronic chip
    ACS Sensors 7, 849−855 (2022).
32. J. Yin, H. Yang, Y. Luo, Q. Wang, H. Yu, and K.H. Li*
    III-Nitride Microsensors for 360° Angle Detection
    IEEE Electron Device Letters 43, 458-461 (2022). (Selected as the Editors' Pick)
33. X. An^#, H. Yang^#, Y. Luo, Q. Wang, Z. Chu*, and K.H. Li*
    Compact GaN-based optical inclinometer
    Optics Letters 47, 1238-1241 (2022).
34. J. Chen, L. Chen, L. Zhu, X. Zhang, and K.H. Li*
    Simultaneous curing and monitoring of resin using GaN chips
    IEEE Sensors Letters 6, 3500804 (2022).
35. J. Chen, J. Yin, X. An, L. Chen, L. Zhu, and K.H. Li*
    III-Nitride Microchips for Sugar Concentration Detection
    IEEE Sensors Journal 22, 2078-2082 (2022).
36. Y. Luo, X. An, L. Chen, and K.H. Li*
    Chip-Scale Optical Airflow Sensor
    Microsystems & Nanoengineering 8, 4 (2022).
37. J.X. Jing, Y.C. Yiu, C. Chen, D.Y. Lei, L. Shao, K.H. Li, N. Wong*, and Z.Q. Chu*
    A data-mining assisted design of structural colors on diamond metasurfaces
    Advanced Photonics Research 2100292, (2022). (Selected as the inside front cover)
38. B. Yu, Y. Luo, L. Chen, Z. Chu, and K.H. Li*
    An optical humidity sensor: a compact photonic chip integrated with artificial opal
    Sensors and Actuators: B. Chemical 349, 130763 (2021).
39. H. Jin, L. Chen, J. Wu, Y. Wu, L. Zhu*, and K.H. Li*
    High-Performance III-Nitride Light-Emitting Diode Stripes
    IEEE Transactions on Electron Devices 68, 5629-5633 (2021).
40. X. An^#, Y. Luo^#, B. Yu, L. Chen, and K.H. Li*
    A Chip-Scale GaN-Based Optical Pressure Sensor With Microdome-Patterned Polydimethylsiloxane (PDMS)
    IEEE Electron Device Letters 42, 1532-1535 (2021).
41. J. Yin, X. An, L. Chen, Q. Wang, H. Yu, H. Huang, and K.H. Li*
    A Miniature GaN Chip for Surface Roughness Measurement
    IEEE Transactions on Electron Devices 68, 4977-4981, (2021).
42. K.H. Li, Y.F. Cheung, W.Y. Fu and H.W. Choi*
    Electrically injected whispering-gallery mode InGaN/GaN microdisks
    Applied Physics Letters 119, 101106 (2021).
43. J. Jing^#, X. An^#, Y. Luo, L. Chen, Z.Q. Chu*, and K.H. Li*
    A Compact Optical Pressure Sensor Based on a III-Nitride Photonic Chip with Nanosphere-Embedded PDMS
    ACS Applied Electronic Materials 3(5), 1982-1987 (2021).
44. Y. Luo^#, B. Yu^#, L. Chen, and K.H. Li*
    Micro Humidity Sensor based on a GaN Chip with Silica Opal
    IEEE Electron Device Letters 42(5), 743-746 (2021). (Selected as the Editors' Pick and Front Cover)
45. J. Yin, L. Chen, Y. Luo, Q. Wang, H. Yu, and K.H. Li*
    Performance of InGaN green light-emitting diodes with on-chip photodetectors based on wire-bonding and flip-chip configurations
    Applied Optics 60(9), 2599-2603 (2021). (Selected as the Editors' Pick and Front Cover)
46. J. Li^#, J. Wu^#, L. Chen, X. An, J. Yin, Y. Wu, L. Zhu. H. Yi, and K.H. Li*
    On-chip Integration of III-Nitride Flip-Chip Light-Emitting Diodes with Photodetectors
    Journal of Lightwave Technology 39(8), 2603-2608 (2021). (Featured in Semiconductor Today)
47. X.S. An, L. Chen, J. Li, and K.H. Li*
    Compact integration of GaN-based photonic chip with microfluidics system
    Optics Letters 46(12), 170-173 (2021).
48. J.H. Yin, X.S. An, L. Chen, J. Li, J.N. Wu, Y.M. Luo, Q. Wang, H.Y. Yu, and K.H. Li*
    Phosphor-based InGaN/GaN White Light-Emitting Diodes with Monolithically Integrated Photodetectors
    IEEE Transactions on Electron Devices 68(1), 132-137 (2021).
49. H. Jin, L. Chen, J. Li, X. An, Y.P. Wu, L. Zhu, H. Yi, and K.H. Li*
    Vertically-Stacked RGB LEDs with Optimized Distributed Bragg Reflectors
    Optics Letters 45(24), 6671-6674 (2020). (Selected as Cover Story)
50. X.S. An, L. Chen, J. Li, Q. Wang, and K.H. Li*
    Compact GaN-Based Photonic Chip for In Situ Real-Time Monitoring of Low Water Content in Ethanol
    ACS Applied Electronic Materials 2(11), 3502-3507 (2020).
51. L. Chen^#, X.S. An^#, J.X. Jing, H.T. Jin, Z.Q. Chu, and K.H. Li*
    Ultracompact Chip-Scale Refractometer Based on an InGaN-Based Monolithic Photonic Chip
    ACS Applied Materials & Interfaces 12(44), 49748-49754 (2020).
52. L. Chen, Y.P. Wu, and K.H. Li*
    Monolithic InGaN/GaN photonic chips for heart pulse monitoring
    Optics Letters 45(18), 4992 (2020).
53. K.H. Li, W.Y. Fu, and H.W. Choi*
    Chip-scale GaN integration
    Progress in Quantum Electronics 70, 100247 (2020).
54. C.H. To, W.Y. Fu, K.H. Li, Y.F. Cheung, and H.W. Choi*
    GaN Microdisk with Direct Coupled Waveguide for Unidirectional Whispering Gallery Mode Emission
    Optics Letters 45(4), 791-794 (2019).
55. K.H. Li, Y.F. Cheung, H.W. Choi*
    Tunable GaN photonic crystal and microdisk on PDMS flexible films
    ACS Applied Electronic Materials 1(7),1112-1119 (2019).
56. K.H. Li, Y.F. Cheung, W. Jin, W.Y. Fu, A.T.L. Lee, S.-C. Tan, S.Y.R. Hui, and H.W. Choi*
    InGaN RGB Light-emitting Diodes with Monolithically-Integrated Photodetectors for Stabilizing Color Chromaticity
    IEEE Transactions on Industrial Electronics 67(6), 5154-5160, (2019).
57. K.H. Li, H. Lu, W.Y. Fu, Y.F. Cheung, H.W. Choi*
    Intensity-Stabilized LEDs with Monolithically Integrated Photodetectors
    IEEE Transactions on Industrial Electronics 66(9), 7426 (2019).
58. K.H. Li, W.Y. Fu, Y. F. Cheung, K.K.Y. Wong, Y. Wang, K.M. Lau, and H.W. Choi*
    Monolithically integrated InGaN/GaN light-emitting diodes, photodetectors, and waveguides on Si substrate
    Optica 5(5), 564-569 (2018).
59. K.H. Li, Y.F. Cheung, W.Y. Fu, K.K.Y. Wong, H.W. Choi*
    Monolithic Integration of GaN-on-Sapphire Light-Emitting Diodes, Photodetectors and Waveguides
    IEEE Journal of Selected Topics in Quantum Electronics 24(6), 3801706 (2018).
60. Y. Park, K.H. Li, W.Y. Fu, Y.F. Cheung, H.W. Choi*
    Packaging of InGaN stripe-shaped light-emitting diodes
    Applied Optics 57 (10), 2452-2458 (2018).
61. Y. Zhang, J.A. Huang, K.H. Li, D. Bai, Y. Wang, T. Wang, and H.W. Choi*
    Influence of Strain on Emission from GaN-on-Si microdisks
    Journal of Physics D: Applied Physics 49, 375103 (2016).
62. Y.F. Cheung^#, K.H. Li^#, and H.W. Choi*
    Flexible Free-Standing III-Nitride Thin Films for Emitters and Displays
    ACS Applied Materials & Interfaces 8(33), 21440–21445 (2016).
63. K.H. Li, Y.F. Cheung, C.W. Tang, C. Zhao, K.M. Lau and H.W. Choi*
    Optical crosstalk analysis of micro-pixelated GaN-based light-emitting diodes on sapphire and Si substrates
    Physica Status Solidi A 213(5), 1193-1198 (2016).
64. K.H. Li, X. Liu, Q. Wang, S. Zhao, and Z. Mi*
    Ultralow-threshold electrically injected AlGaN nanowire ultraviolet lasers on Si operating at low temperature
    Nature Nanotechnology 10, 140–144 (2015). (Featured in Semiconductor Today)
65. K.H. Li, Y.F. Cheung, W.S. Cheung and H.W. Choi*
    Confocal microscopic analysis of optical crosstalk in GaN micro-pixel light-emitting diodes
    Applied Physics Letters 107, 171103 (2015).
66. K.H. Li, Y.F. Cheung, and H.W. Choi*
    Whispering Gallery Mode Lasing in Optically-isolated III-Nitride Nano-Rings
    Optics Letters 40, 2564-2567 (2015).
67. Y. Zhang, X. Zhang, K.H. Li, Y.F. Cheung, C. Feng, and H.W. Choi*
    Advances in III-Nitride semiconductor microdisk lasers
    Physica Status Solidi A 212, 960–973 (2015).
68. K.H. Li, Q. Wang, H.P.T. Nguyen, S. Zhao, and Z. Mi*
    Polarization-resolved electroluminescence study of InGaN/GaN dot-in-a-wire light-emitting diodes grown by molecular beam epitaxy
    Physica Status Solidi A 201431726, (2015).
69. Y.F. Cheung^#, K.H. Li^#, R.S.Y. Hui, and H.W. Choi*
    Observation of enhanced visible and infrared emissions in photonic crystal thin-film light-emitting diodes
    Applied Physics Letters 105, 071104 (2014).
70. Q. Wang, X. Liu, M.G. Kibria, S. Zhao, H.P.T. Nguyen, K.H. Li, Z. Mi*, T. Gonzalez, and M.P. Andrews
    p-Type Dopant Incorporation and Surface Charge Properties of Catalyst-free GaN Nanowires Revealed by Micro-Raman Scattering and X-ray Photoelectron Spectroscopy
    Nanoscale 6, 9970 (2014).
71. K.H. Li, K.Y. Zang, S.J. Chua, and H.W. Choi*
    Embedding nano-pillar arrays into InGaN light-emitting diodes
    Physica Status Solidi (c) 11, 742 (2014). (Selected as the Front Cover)
72. K.H. Li, C. Feng, and H.W. Choi*
    Analysis of Micro-lens Integrated Flip-chip InGaN Light-emitting Diodes by Confocal Microscopy
    Applied Physics Letters 104, 051107 (2014).
73. K.H. Li, K.Y. Zang, S.J. Chua, and H.W. Choi*
    III-nitride Light-emitting Diode with Embedded Photonic Crystals
    Applied Physics Letters 102, 181117 (2013).
74. K.H. Li, Q. Zhang, and H.W. Choi*
    1-μm Micro-lens Array on Flip-chip LEDs
    Japanese Journal of Applied Physics 52, 08JH08, (2013).
75. K.H. Li, Y.F. Cheung, and H.W. Choi*
    Optical and Thermal Analyses of Thin-film Hexagonal Micro-mesh Light-emitting Diodes
    IEEE Photonics Technology Letters 25, 374 (2013).
76. Q. Zhang, K.H. Li and H.W. Choi*
    Polarized emission from InGaN light-emitting diodes with self-assembled nanosphere coating
    IEEE Photonics Technology Letters 24, 1642 (2012).
77. K.H. Li, Z.T. Ma and H.W. Choi*
    Tunable clover-shaped GaN photonic bandgap structures patterned by dual-step nanosphere lithography
    Applied Physics Letters 100, 141101 (2012).
78. Q. Zhang, K.H. Li and H.W. Choi*
    InGaN light-emitting diodes with indium-tin-oxide sub-micron lenses patterned by nanosphere lithography
    Applied Physics Letters 100, 061120 (2012).
79. K.H. Li, Z.T. Ma and H.W. Choi*
    Single whispering gallery mode lasing from metal-clad GaN nano-pillars
    Optics Letters 37, 374 (2012).
80. K.H. Li, and H.W. Choi*
    Enhanced light extraction efficiency of GaN light-emitting diodes with photonic crystal ITO films patterned by nanosphere lithography
    Journal of Applied Physics 110, 053104 (2011).
81. K.H. Li, and H.W. Choi*
    Tuning of photonic bandgap via dimensional control of nanopillars
    Physica Status Solidi (c) 8, 2351 (2011).
82. Z.L. Li, K.H. Li and H.W. Choi*
    Reliability study on micro-structured InGaN light-emitting diodes
    Physica Status Solidi (c) 8, 2258 (2011).
83. K.H. Li, Z.T. Ma and H.W. Choi*
    High-Q whispering-gallery mode lasing from nanosphere-patterned GaN nano-ring arrays
    Applied Physics Letters 98, 071106 (2011).
84. K.H. Li and H.W. Choi*
    Air-spaced GaN nanopillar photonic bandgap structures patterned by nanosphere lithography
    Journal of Applied Physics 109, 023107 (2010).
85. Z.L. Li, K.H. Li and H.W. Choi*
    Mechanism of optical degradation in micro-structured InGaN light-emitting diodes
    Journal of Applied Physics 108, 114511 (2010).

1. R. Huang, T. Chen, L, Zhu, and K.H. Li
   Optodevice-in-Spherefor Biaxial Tilt Sensing
   IEEE SENSORS 2024, (Oct. 2024).
2. Y. Luo, Y. Liu, H. Yu, and K.H. Li
   Compact GaN-Based Optical Force Sensors with Integrated Hemispherical Reflectors
   IEEE SENSORS 2024, (Oct. 2024).
3. Y. Yang, Y. Luo, and K.H. Li
   GaN Monolithic Chips for Rapid Temperature Sensing
   IEEE SENSORS 2024, (Oct. 2024).
4. Y. Luo, Y. Liu, H. Yu, and K.H. Li
   Optical Polarization Encoding Using Chip-Scale GaN Optoelectronic Devices
   The 9th Optoelectronics Global Conference (OGC 2024), (Sep. 2024).
5. Y. Li, X. An, and K.H. Li
   Droplet-based Accelerometers Incorporating Optical GaN Devices
   The 9th Optoelectronics Global Conference (OGC 2024), (Sep. 2024).
6. X. An and K.H. Li
   Monolithically Integrated GaN Optical Devices for Proximity Detection
   14th International Conference on Nitride Semiconductors (ICNS-14), (Nov. 2023).
7. J. Chen, X.K. Tang, and K. H. Li
   III-Nitride Microsensor for Magnetic Field Detection
   14th International Conference on Nitride Semiconductors (ICNS-14), (Nov. 2023).
8. Y. Luo, J. Yin, G. Lu, and K. H. Li
   Viscosity Sensing based on Chip-Scale GaN Optical Integrated Devices
   14th International Conference on Nitride Semiconductors (ICNS-14), (Nov. 2023).
9. G. Lu, X. An, Y. Luo,H. Yang, and K.H. Li
   Droplet Flow Sensors based on GaN Integrated Devices
   14th International Conference on Nitride Semiconductors (ICNS-14), (Nov. 2023).
10. L. Pan, J. Chen, X.An, X. Tang, and K.H. Li
    GaN-based Optical Hydrophones for Underwater Acoustic Sensing
    14th International Conference on Nitride Semiconductors (ICNS-14), (Nov. 2023).
11. G. Lu, X. An, Y. Luo, Y. Chai, and K.H. Li, Droplet microsensors based on GaN diode optopairs, accepted, Asia Communications and Photonics Conference (ACP 2022), (Nov. 2022). (Selected as the winners of the Best Poster Award)
12. Y. Luo, G. Lu, J. Yin, and K.H. Li, A compact design and fabrication of optical force sensors based on integrated GaN devices, Asia Communications and Photonics Conference (ACP 2022), (Nov. 2022).
13. Y. Luo, J. Yin, and K.H. Li, Self-adjusting light source based on a dual-function GaN light-emitting diode, 7^th Optoelectronics Global Conference (OGC 2022), (Nov. 2022). (Selected as the winners of the Best Paper Award)
14. K.H. Li, Chip-scale sensing based on GaN optoelectronics, Vebleo Webinar on Science, Engineering and Technology, (2021).
15. K.H. Li and H.W. Choi, Design of Photonic Crystal Nano-Cavity for Multi-Colour Laser, 12^th International Symposium on Advanced Plasma Science and its Applications for Nitrides and Nanomaterials / 13^th International Conference on Plasma-Nano Technology & Science, (Mar. 2020).
16. K.H. Li, Y.F. Cheung, and H.W. Choi, Tuning the photonic bandgap in GaN nanopillar arrays on stretchable PDMS film, 13^th International Conference on Nitride Semiconductors, (Jul. 2019).
17. X. Ma, K.H. Li, and H.W. Choi, The importance of electrical isolation between GaN monolithically integrated devices, 13^th International Conference on Nitride Semiconductors, (Jul. 2019).
18. H. Zi, K.H. Li, and H.W. Choi, F. Tabataba-Vakili, S. Rennesson, B. Damilano, E. Frayssinet, J.-Y. Duboz, F. Semond, L. Doyennette, C. Brimont, T. Guillet, B. Gayral, and P. Boucaud, Whispering-gallery mode optically-pumped lasing from InGaN/GaN microdisks on GaN substrate, 13^th International Conference on Nitride Semiconductors, (Jul. 2019).
19. H.W. Choi, W.Y. Fu, K.H. Li, and Y.F. Cheung, GaN monolithic integration for lighting and display, SPIE Photonics West 2019, (Feb. 2019).
20. K.H. Li, Y.F. Cheung, C.H. To, and H.W. Choi, Optically pumped lasing from an InGaN/GaN microdisk on a bendable polydimethylsiloxane (PDMS) substrate, International Workshop on Nitride Semiconductors, (Nov. 2018).
21. K.H. Li, Y.F. Cheung, and H.W. Choi, RGB Light-emitting Diodes with Monolithically-Integrated Photodetectors for Stabilizing Color Chromaticity, International Workshop on Nitride Semiconductors, (Nov. 2018).
22. K.H. Li, W.Y. Fu, and H.W. Choi, Monolithic Integration of GaN Light-emitting Diodes and Photodetectors and their Applications, 16^th International Symposium on the Science and Technology of Lighting, accepted, Sheffield, UK, (Jun. 2018)
23. K.H. Li, H.T. Lu, and H.W. Choi, Stabilizing Color Chromaticity of RGB Light-emitting Diodes Using Monolithically-Integrated Photodetectors, Compound Semiconductor Week 2018, Cambridge, MA, (May. 2018).
24. K.H. Li, Y.F. Cheung, and H.W. Choi, 3D GaN Photonic Integrated Circuits, 12^th International Conference on Nitride Semiconductors, (Jul. 2017).
25. J. Yu, W.Y. Fu, K.H. Li, and H.W. Choi, Monolithic integration of GaN SB-MOSFET-based Logic Circuitry with LED array, 12^th International Conference on Nitride Semiconductors, (Jul. 2017).
26. Y. Park, K.H. Li, Y.F. Cheung, and H.W. Choi, Homogeneous InGaN Light-Emitting Diode Tube, 12^th International Conference on Nitride Semiconductors, (Jul. 2017).
27. Y. Park, K.H. Li, Y.F. Cheung, W.Y. Fu, and H.W. Choi, Vertically-Mounted InGaN Light-Emitting Diode Stripe, Compound Semiconductor Week 2017, (May. 2017).
28. K.H. Li, Y.F. Cheung, K.M. Lau, and H.W. Choi, Monolithically-Integrated GaN Photonic Systems, International Workshop on Nitride Semiconductors, (Oct. 2016).
29. H.T. Lu, K.H. Li, and H.W. Choi, Monolithic Integration of Light-Emitting Diode and Photodetector for Self-Monitoring of Light Output, International Workshop on Nitride Semiconductors, (Oct. 2016)
30. H.T. Lu, K.H. Li, and H.W. Choi, GaN light-emitting diode with monolithically-integrated photodetector, 4^th International Conference on Light-Emitting Devices and Their Industrial Applications, (May. 2016).
31. K.H. Li, Y.F. Cheung, W.S. Cheung, and H.W. Choi, Confocal Microscopic analysis of optical crosstalk from micro-pixel light-emitting diodes, 11^th International Conference On Nitride Semiconductors, (Aug. 2015).
32. Z. Mi, S. Zhao, X. Liu, K.H. Li, J. Kang, Q. Wang, S. Y. Woo, and G. Botton, Electrically Injected AlGaN Nanowire Deep UV Lasers on Si, 11^th International Conference On Nitride Semiconductors, (Aug. 2015).
33. Y. Zhang, J.A. Huang, K.H. Li, D. Bai, Y. Wang, T. Wang, and H.W. Choi, Strain relaxation effects in InGaN/GaN microdisks pivoted on Si, 11^th International Conference On Nitride Semiconductors, (Aug. 2015).
34. Y.F. Cheung, K.H. Li, J.A. Huang and H.W. Choi, Photo-electro-vibrational-thermal characterization of epi-flexible GaN light-emitting diodes, 11^th International Conference On Nitride Semiconductors, (Aug. 2015).
35. W.S. Cheung, K.H. Li, C.W. Tang, C. Zhao, K.M. Lau and H.W. Choi, Optical characteristics of GaN/Si micro-pixel light-emitting diode arrays, 11^th International Conference On Nitride Semiconductors, (Aug. 2015).
36. S. Zhao, X. Liu, K.H. Li, S. Y. Woo, G. Botton, and Z. Mi, AlGaN nanowire ultraviolet lasers on Si, 2015 IEEE Summer Topicals Meeting Series, (Jul. 2015).
37. S. Zhao, X.H. Liu, B.H. Le, J.J. Kang, K.H. Li, Q. Wang, and Z. Mi, Electrically Injected Deep Ultraviolet Lasers Based on AlGaN Nanostructures, Compound Semiconductor Week 2015, Santa Barbara, USA, (Jul. 2015).
38. H.W. Choi, K.H. Li, and Y.F. Cheung, Photo-pumped lasing from InGaN Nanorings, 7^th Asia-Pacific Workshop on Widegap Semiconductors, Seoul, Korea, (May 2015).
39. W.S. Cheung, K.H. Li, and H.W. Choi, Improved Thermal and Optical Performance of Chip-on-board Light-emitting-diode Panel Lamps, SPIE Photonics West 2015, San Francisco, USA, (Feb. 2015).
40. K.H. Li, X. Liu, S. Zhao, Q. Wang, and Z. Mi, Ultralow threshold electrically-injected AlGaN nanowire ultraviolet lasers on Si, SPIE Photonics West 2015, San Francisco, USA, (Feb. 2015).
41. Y. F. Cheung, K.H. Li, R. S. Y. Hui, and H. W. Choi, Thermal Performances of Photonic Crystal Thin-film Light-emitting Diodes, 9^th International Symposium on Semiconductor Light Emitting Devices, Kaohsiung, Taiwan, (Dec. 2014).
42. K.H. Li, X. Liu, S. Zhao, and Z. Mi, Ultralow Threshold Electrically Injected AlGaN Nanowire Lasers Grown Directly on Si, 9^th International Symposium on Semiconductor Light Emitting Devices, Kaohsiung, Taiwan, (Dec. 2014).
43. K.H. Li, Y. F. Cheung, and H. W. Choi, Flexible GaN Light-Emitting Diodes, late new presentation, International Workshop on Nitride semiconductors, Wrocław, Poland, (Aug. 2014).
44. W.S. Cheung, K.H. Li, Y.F. Cheung, and H.W. Choi, Cross-talk-free optically-isolated micro-light-emitting diode arrays, International Workshop on Nitride semiconductors, Wrocław, Poland, (Aug. 2014).
45. K.H. Li, X. Liu, Q. Wang, S. Zhao, and Z. Mi, Electrically pumped ultraviolet random lasing from AlGaN nanowires, International Workshop on Nitride semiconductors, Wrocław, Poland, (Aug. 2014).
46. K.H. Li, Q. Wang, H. P. T. Nguyen, S. Zhao, and Z. Mi, Polarized Light Emission from InGaN Nanowire Light-Emitting Diode, International Workshop on Nitride semiconductors, Wrocław, Poland, (Aug. 2014).
47. K.H. Li and H.W. Choi, Flip-chip InGaN Light-emitting Diodes with an Integrated Microlens Array, late news presentation at 18^th Micro-optics Conference, Tokyo, Japan (Oct. 2013).
48. K.H. Li, K.Y. Zang, S.J. Chua, and H.W. Choi, Embedding Nanopillar Arrays into InGaN Light-Emitting Diodes, 10^th International Conference on Nitride Semiconductors, Washington, USA, (Aug. 2013).
49. K.H. Li, S.J. Chua, and H.W. Choi, InGaN light-emitting diode with an embedded nano-pillar array, Nanoelectronics and Nanophotonics Workshop, Hong Kong, (May. 2013).
50. K.H. Li and H.W. Choi, Monolithic Integration of Close-packed Micro-lens Array on Flip-chip LED, the 6^th Asia-Pacific Workshop on Widegap Semiconductors, Taiwan, (May. 2013).
51. W.S.Cheung, Y.F. Cheung, Z.T. Ma, K.H. Li and H.W. Choi, Light-emitting Diodes of Stripe Geometries, the 6^th Asia-Pacific Workshop on Widegap Semiconductors Taiwan, (May. 2013).
52. K.H. Li, X.H. Zhang, C. Feng and H.W. Choi, Gallium Nitride Nanophotonic Structures Patterned by Nanosphere Lithography, 7^th International Conference on Materials for Advanced Technologies, Singapore, (Jul. 2013).
53. K.H. Li and H.W. Choi, Broadband emission from an ensemble of nano-pillars with multiple diameters, SPIE Photonics West 2013, San Francisco, USA (Feb. 2013).
54. K.H. Li, Y.F. Cheung, and H.W. Choi, Thin-film Vertical Micro-LEDs, International Workshop on Nitride semiconductors, Sapporo, Japan, (Oct. 2012).
55. K.H. Li, Q. Zhang, and H.W. Choi, 1-μm Micro-lens Array on Flip-chip LEDs, International Workshop on Nitride semiconductors, Sapporo, Japan, (Oct. 2012).
56. Q. Zhang, K.H. Li and H.W. Choi, Polarized InGaN Light-emitting Diode with self-assembled opal coating, IEEE 12^th International Conference on Nanotechnology, Birmingham, UK (Aug. 2012).
57. Y.F. Cheung, K.H. Li and H.W. Choi, Thin-film Photonic Crystal Vertical LED patterned by Nanosphere Lithography, 9^th International Symposium on Semiconductor Light Emitting Devices, Berlin, Germany (Jul. 2012).
58. K.H. Li, Z.T. Ma and H.W. Choi, Clover-shaped GaN photonic bandgap structures patterned by repeated nanosphere lithography, 9^th International Conference on Nitride Semiconductors, Glasgow, UK (Jul. 2011).
59. K.H. Li, G.Y. Mak and H.W. Choi, Hexagonally-arranged Ag nanosparticles embedded within GaN nanopillar arrays, 9^th International Conference on Nitride Semiconductors, Glasgow, UK (Jul. 2011).
60. K.H. Li and H.W. Choi, Light-emitting diode with photonic crystal on ITO film, 9th International Conference on Nitride Semiconductors, Glasgow, UK (Jul. 2011).
61. Q. Zhang, X.H. Zhang, K.H. Li and H.W. Choi, Polarization of GaN light emitting diode with 3D opal-based photonic crystals, 9^th International Conference on Nitride Semiconductors, Glasgow, UK (Jul. 2011).
62. K.H. Li, K.Y. Zhang, S.J. Chua and H.W. Choi, Interconnected nano-pillar photonic crystal LEDs via epitaxial lateral overgrowth, 9^th International Conference on Nitride Semiconductors, Glasgow, UK (Jul. 2011).
63. K.H. Li and H.W. Choi, Single whispering gallery mode lasing from metal-clad GaN nanopillar array, 38^th International Symposium on Compound Semiconductors, Berlin, Germany (May 2011).
64. K.H. Li and H.W. Choi, Hexagonal-close-packed Nano-ring Array Fabricated by Nanosphere Lithography, 2010 Micro-optics Conference, Hsinchu, Taiwan (Oct. 2010).
65. K.H. Li and H.W. Choi, Tuning of Photonic Bandgap via Dimensional Control of Nanopillars, The International Workshop on Nitride semiconductors, Tampa, Florida, USA (Sep. 2010).
66. Z.L. Li, K.H. Li and H.W. Choi, Reliability Study on Micro-structured InGaN Light-emitting Diodes, The International Workshop on Nitride semiconductors, Tampa, Florida, USA (Sep. 2010).
67. K.H. Li and H.W. Choi, Site-controlled GaN photonic crystals by nanosphere lithography, Proceeding of the International Conference on White LEDs and Solid State Lighting, Eindhoven, Netherlands, (Jul. 2010).
68. W.Y. Fu, K.H. Li and H.W. Choi, From nanosphere lithography to self-assembled photonic crystal, Progress in Electromagnetics Research Symposium, Cambridge MA, USA (Jul. 2010).