Research Area

• Infrared laser spectroscopy
• Optical gas sensor and environmental application
• Urban air quality and air pollution

Research Interests

Dr. Kaiyuan Zheng's research interests cover the exploration of light-gas interactions within optical cavities, fibers, and waveguides, with the aim of developing advanced laser spectroscopic techniques for ultra-sensitive and selective gas sensing. Besides the technology innovation, Dr. Zheng’s research also aims to developing sensing applications in pollutant monitoring and leakage identification, to understand the physical and chemical processes of air pollution in complex urban and field environments.

Recent Publications / Representative Publications

• Zheng, K.; Pi, M.; Huang, Y.; Peng, Z.; Zhao, H.; Song, F.; Bao, H.; Jiang, S.; Ho, H. L.; Zheng, C.; Jin, W., Waveguide‐based on‐chip photothermal spectroscopy for gas sensing. Laser Photonics Reviews 2024, 18 (5), 2301071.
• Zheng, K.; Zhang, L.; Leng, S.; Xi, Z.; Zheng, C.; Wang, Y.; Tittel, F. K., An exhaled breath gas sensor system for near-infrared ammonia measurement and kidney diagnostics. Spectrochimica Acta Part A: Molecular Biomolecular Spectroscopy 2024, 124625.
• Zheng, K.; Luo, W.; Duan, L.; Zhao, S.; Jiang, S.; Bao, H.; Ho, H. L.; Zheng, C.; Zhang, Y.; Ye, W.; Jin, W., High sensitivity and stability cavity-enhanced photoacoustic spectroscopy with dual-locking scheme. Sensors Actuators B: Chemical 2024, 415, 135984.
• Zheng, K.; Bao, H.; Luo, W.; Liu, F.; Chen, F.; Liao, H.; Zhao, S.; Jiang, S.; Zheng, C.; Ho, H. L.; Gao, S.; Jin, W., Hollow-core fiber-based mid-infrared photothermal spectroscopy for multi-component gas sensing. IEEE Journal of Selected Topics in Quantum Electronics 2024, 5600606.
• Zhao, Y.; Liao H.; Zheng K.; Bao, H.; Jiang, S.; Ho, H. L.; Gao, S.; Wang, Y.; Jin, W., Stimulated Raman photothermal spectroscopy for gas sensing in a hollow-core optical fiber. Optica 2024.
• Peng, Z.; Huang, Y.; Zheng, K.; Min, Y.; Zhao, H.; Pi, M.; Song, F.; Zheng, C.; Zhang, Y.; Chang, Z.; Wang, Y., Slow-light-enhanced polarization division multiplexing infrared absorption spectroscopy for on-chip wideband multi-gas detection in a 1D photonic crystal waveguide. Analytical Chemistry 2024, 96 (8), 3445-3453.
• Guan, G.; Liu, A.; Wu, X.; Zheng, C.; Liu, Z.; Zheng, K.; Pi, M.; Yan, G.; Zheng, J.; Wang, Y., Near-infrared off-axis cavity-enhanced optical frequency comb spectroscopy for CO2/CO dual-gas detection assisted by machine learning. ACS sensors 2024, 9 (2), 820-829.
• Zheng, K.; Yu, L.; Zheng, C.; Xi, Z.; Zhang, Y.; Yan, G.; Zhang, H.; Zhang, Y.; Wang, Y.; Tittel, F. K., Vehicle-deployed off-axis integrated cavity output spectroscopic CH4/C2H6 sensor system for mobile inspection of natural gas leakage. ACS sensors 2022, 7 (6), 1685-1697.
• Zheng, K.; Jiang, S.; Chen, F.; Zhao, Y.; Gao, S.; Wang, Y.; Ho, H. L.; Jin, W., Mid-infrared all-optical modulators based on an acetylene-filled hollow-core fiber. Light: Advanced Manufacturing 2022, 3 (4), 712-719.
• Zheng, K.; Zheng, C.; Li, J.; Ma, N.; Liu, Z.; Zhang, Y.; Wang, Y.; Tittel, F. K., Near-infrared methane sensor system using off-axis integrated cavity output spectroscopy with novel dual-input dual-output coupling scheme for mode noise suppression. Sensors Actuators B: Chemical 2020, 308, 127674.
• Zheng, K.; Zheng, C.; Ma, N.; Liu, Z.; Yang, Y.; Zhang, Y.; Wang, Y.; Tittel, F. K., Near-infrared broadband cavity-enhanced spectroscopic multigas sensor using a 1650 nm light emitting diode. ACS sensors 2019, 4 (7), 1899-1908.