| [1] | Banga, I. et al. Recent advances in gas detection methodologies with a special focus on environmental sensing and health monitoring applications-a critical review. ACS Sensors 8, 3307-3319 (2023). doi: 10.1021/acssensors.3c00959 |
| [2] | Rocher-Ros, G. et al. Global methane emissions from rivers and streams. Nature 621, 530-535 (2023). doi: 10.1038/s41586-023-06344-6 |
| [3] | Jung, M. H. et al. Highly sensitive and selective acetylene CuO/ZnO heterostructure sensors through electrospinning at lean O2 concentration for transformer diagnosis. ACS Sensors 9, 217-227 (2024). doi: 10.1021/acssensors.3c01844 |
| [4] | Bai, J. Q. et al. Explosion evolution characteristic of methane-acetylene mixtures under constant volume space. Combustion Theory and Modelling 29, 125-144 (2025). doi: 10.1080/13647830.2025.2455078 |
| [5] | Wang, R. Q. et al. Lithium niobate tuning fork-enhanced photoacoustic spectroscopy and light-induced thermoelastic spectroscopy. Applied Physics Reviews 12, 041404 (2025). doi: 10.1063/5.0277336 |
| [6] | Niu, C. et al. All-fiber offset-core sandwich-structured gas sensor based on photothermal spectroscopy detection. Optics Express 34, 6476-6485 (2026). doi: 10.1364/OE.589730 |
| [7] | Ma, Y. F. et al. An ultra-highly sensitive LITES sensor based on multi-pass cell with ultra-dense spot pattern designed by multi-objective algorithm. PhotoniX 6, 26 (2025). doi: 10.1186/s43074-025-00187-2 |
| [8] | Russo, S. D. et al. Dual-tube MEMS-based spectrophone for sub-ppb mid-IR photoacoustic gas detection. Photoacoustics 40, 100644 (2024). doi: 10.1016/j.pacs.2024.100644 |
| [9] | Li, C. N. et al. Indirect detection of hydrogen based on light-induced thermoelastic spectroscopy. Optics Express 34, 1905-1918 (2026). doi: 10.1364/OE.586230 |
| [10] | Wang, R. Q. et al. Highly sensitive laser spectroscopy sensing based on a novel four-prong quartz tuning fork. Opto-Electronic Advances 8, 240275 (2025). doi: 10.29026/oea.2025.240275 |
| [11] | Wang, J. P. et al. Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy. Light: Science & Applications 13, 77 (2024). |
| [12] | Qiao, S. D. et al. Elliptical acoustic resonator-based dual-quartz-enhanced photoacoustic spectroscopy sensing. Analytical Chemistry 98, 5707-5714 (2026). doi: 10.1021/acs.analchem.5c07844 |
| [13] | Qiao, S. D. et al. Quartz-enhanced laser spectroscopy sensing. Light: Science & Applications 15, 5 (2026). |
| [14] | Pei, Z. Y. et al. Enrichment strategies in surface-enhanced Raman scattering: theoretical insights and optical design for enhanced light-matter interaction. Opto-Electronic Science 4, 250015 (2025). doi: 10.29026/oes.2025.250015 |
| [15] | Wang, F. P. et al. mL-level low gas consumption PAS sensor for dual gases CH4/C2H2 detection based on an optimized TT-type resonator. Measurement 242, 116288 (2025). |
| [16] | Nie, Q. X. et al. Agile cavity ringdown spectroscopy enabled by moderate optical feedback to a quantum cascade laser. Opto-Electronic Advances 7, 240077 (2024). doi: 10.29026/oea.2024.240077 |
| [17] | Minamikawa, T. et al. Long-range enhancement for fluorescence and Raman spectroscopy using Ag nanoislands protected with column-structured silica overlayer. Light: Science & Applications 13, 299 (2024). |
| [18] | Ma, H. X. et al. Overtone acoustic feedback enhanced light-induced thermoelastic spectroscopy sensing. Photonics Research 14, 683-689 (2026). doi: 10.1364/PRJ.579738 |
| [19] | Lin, X. N. et al. Quantitative detection of trace nanoplastics (down to 50 nm) via surface-enhanced Raman scattering based on the multiplex-feature coffee ring. Opto-Electronic Advances 8, 240260 (2025). doi: 10.29026/oea.2025.240260 |
| [20] | Yang, H. Y. et al. Observation of single-molecule Raman spectroscopy enabled by synergic electromagnetic and chemical enhancement. PhotoniX 5, 3 (2024). doi: 10.1186/s43074-024-00119-6 |
| [21] | Zhao, Z. C. et al. Applications of ultrafast nano-spectroscopy and nano-imaging with tip-based microscopy. eLight 5, 1 (2025). |
| [22] | Liu, X. N. et al. High-stability and fast calibration-free temperature measurement based on light-induced thermoelastic spectroscopy. Ultrafast Science 5, 0083 (2025). doi: 10.34133/ultrafastscience.0083 |
| [23] | Wang, L. H. et al. Sub-ppb level HCN photoacoustic sensor employing dual-tube resonator enhanced clamp-type tuning fork and U-net neural network noise filter. Photoacoustics 38, 100629 (2024). doi: 10.1016/j.pacs.2024.100629 |
| [24] | Zhang, C. et al. Multi-resonator T-type photoacoustic cell based photoacoustic spectroscopy gas sensor for simultaneous measurement C2H2, CH4 and CO2. Sensors and Actuators B: Chemical 427, 137168 (2025). doi: 10.1016/j.snb.2024.137168 |
| [25] | Wu, G. H. & Yu H. Y. Research highlight: breaking the shot noise limit of mid-infrared dual-comb spectroscopy using intensity-difference squeezing. eLight 5, 24 (2025). doi: 10.1186/s43593-025-00105-w |
| [26] | Zhang, M. et al. A high-sensitivity compact dual-T-type resonant fiber-optic photoacoustic sensor for simultaneous detection of multiple gases. Sensors and Actuators B: Chemical 418, 136328 (2024). doi: 10.1016/j.snb.2024.136328 |
| [27] | Kosterev, A. A. et al. Quartz-enhanced photoacoustic spectroscopy. Optics Letters 27, 1902-1904 (2002). doi: 10.1364/OL.27.001902 |
| [28] | Qiao, S. D. et al. Ultra-highly sensitive dual gases detection based on photoacoustic spectroscopy by exploiting a long-wave, high-power, wide-tunable, single-longitudinal-mode solid-state laser. Light: Science & Applications 13, 100 (2024). |
| [29] | Zifarelli, A. et al. Effect of gas turbulence in quartz-enhanced photoacoustic spectroscopy: a comprehensive flow field analysis. Photoacoustics 38, 100625 (2024). doi: 10.1016/j.pacs.2024.100625 |
| [30] | Ma, H. X. et al. Dual-mode quartz-enhanced spectroscopy enabled by mixed heterodyne demodulation for frequency-mismatch-free gas sensing. Laser & Photonics Reviews 20, e02059 (2026). doi: 10.1002/lpor.202502059 |
| [31] | Yang, M. et al. Highly sensitive QEPAS sensor for sub-ppb N2O detection using a compact butterfly-packaged quantum cascade laser. Applied Physics B 130, 6 (2024). doi: 10.1007/s00340-023-08140-6 |
| [32] | Ma, Y. F. et al. A novel tapered quartz tuning fork-based laser spectroscopy sensing. Applied Physics Reviews 11, 041412 (2024). doi: 10.1063/5.0214874 |
| [33] | Mu, J. J. et al. Photoacoustic spectroscopy and light-induced thermoelastic spectroscopy based on inverted-triangular lithium niobate tuning fork. Opto-Electronic Science 4, 250035 (2025). doi: 10.29026/oes.2025.250035 |
| [34] | Xie, Y. C. et al. Sensitivity improvement of quartz-enhanced photoacoustic spectroscopy using the stochastic resonance method. Photoacoustics 43, 100707 (2025). doi: 10.1016/j.pacs.2025.100707 |
| [35] | Spagnolo, V. et al. THz Quartz-enhanced photoacoustic sensor for H2S trace gas detection. Optics Express 23, 7574-7582 (2015). doi: 10.1364/OE.23.007574 |
| [36] | He, Y. et al. Optical component-free dual-gas quartz-enhanced photoacoustic spectroscopy sensor based on highly integrated interband cascade lasers. ACS Sensors 10, 5238-5244 (2025). doi: 10.1021/acssensors.5c01465 |
| [37] | Shi, C. et al. A mid-infrared fiber-coupled QEPAS nitric oxide sensor for real-time engine exhaust monitoring. IEEE Sensors Journal 17, 7418-7424 (2017). doi: 10.1109/JSEN.2017.2758640 |
| [38] | Ye, W. L. et al. Infrared dual-gas CH4/C2H2 sensor system based on dual-channel off-beam quartz-enhanced photoacoustic spectroscopy and time-division multiplexing technique. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 285, 121908 (2023). doi: 10.1016/j.saa.2022.121908 |
| [39] | Di Gioia, M. et al. Signal-to-noise ratio analysis for the voltage-mode read-out of quartz tuning forks in QEPAS applications. Micromachines 14, 619 (2023). doi: 10.3390/mi14030619 |
| [40] | Ma, Y. F. et al. Quartz-tuning-fork enhanced photothermal spectroscopy for ultra-high sensitive trace gas detection. Optics Express 26, 32103-32110 (2018). doi: 10.1364/OE.26.032103 |
| [41] | Qiao, S. D. et al. Calibration-free measurement of absolute gas concentration and temperature via light-induced thermoelastic spectroscopy. Advanced Photonics 7, 066007 (2025). doi: 10.1117/1.ap.7.6.066007 |
| [42] | He, Y. et al. Standoff LITES sensor based on a frequency-stabilized encased quartz tuning fork. Laser & Photonics Reviews 20, e02918 (2026). doi: 10.1002/lpor.202502918 |
| [43] | Sun, H. Y. et al. Parts-per-quadrillion level gas molecule detection: CO-LITES sensing. Light: Science & Applications 14, 180 (2025). |
| [44] | Zhang, D. Q. et al. Cavity-enhanced light-induced thermoelastic spectroscopy for trace-gas sensing. Optics Express 32, 33618-33627 (2024). doi: 10.1364/OE.536849 |
| [45] | Ma, Y. F. et al. Design of multipass cell with dense spot patterns and its performance in a light-induced thermoelastic spectroscopy-based methane sensor. Light: Advanced Manufacturing 6, 1 (2025). doi: 10.37188/lam.2025.001 |
| [46] | Shi, J. Q. et al. Trace gas detection based on dual-QTFs laser-induced thermoelastic spectroscopy. Infrared Physics & Technology 145, 105702 (2025). doi: 10.1016/j.infrared.2024.105702 |
| [47] | Yang, X. et al. Non-resonant quartz-enhanced photoacoustic spectroscopy. Chinese Optics Letters 23, 093002 (2025). doi: 10.3788/COL202523.093002 |
| [48] | Sun, X. R. et al. An ultrahighly sensitive CH4-TDLAS sensor based on an 80-m optical path length multipass cell with a dense Circular spot pattern. Analytical Chemistry 97, 10886-10892 (2025). doi: 10.1021/acs.analchem.5c01773 |
| [49] | Liu, X. N. et al. Highly sensitive HF detection based on absorption enhanced light-induced thermoelastic spectroscopy with a quartz tuning fork of receive and shallow neural network fitting. Photoacoustics 28, 100422 (2022). doi: 10.1016/j.pacs.2022.100422 |
| [50] | Zifarelli, A. et al. Methane and ethane detection from natural gas level down to trace concentrations using a compact mid-IR LITES sensor based on univariate calibration. Photoacoustics 29, 100448 (2023). doi: 10.1016/j.pacs.2023.100448 |
| [51] | Wang, Y. Z. et al. Fast step heterodyne light-induced thermoelastic spectroscopy gas sensing based on a quartz tuning fork with high-frequency of 100 kHz. Opto-Electronic Advances 9, 250150 (2026). doi: 10.29026/oea.2026.250150 |
| [52] | Liu, H. et al. Light-induced thermoelastic spectroscopy by employing the first harmonic phase angle method. Optics Communications 530, 129155 (2023). doi: 10.1016/j.optcom.2022.129155 |
| [53] | Wang, R. Q. et al. Ultrahigh sensitive LITES sensor based on a trilayer ultrathin perfect absorber coated T-head quartz tuning fork. Laser & Photonics Reviews 19, 2402107 (2025). doi: 10.1002/lpor.202402107 |
| [54] | Shang, Z. J. et al. Robust and compact light-induced thermoelastic sensor for atmospheric methane detection based on a vacuum-sealed subminiature tuning fork. Photoacoustics 42, 100691 (2025). doi: 10.1016/j.pacs.2025.100691 |
| [55] | Sun, H. Y. et al. Highly sensitive and real-simultaneous CH4/C2H2 dual-gas LITES sensor based on Lissajous pattern multi-pass cell. Opto-Electronic Science 3, 240013 (2024). doi: 10.29026/oes.2024.240013 |
| [56] | Liu, Y. H. et al. A highly sensitive LITES sensor based on a multi-pass cell with dense spot pattern and a novel quartz tuning fork with low frequency. Opto-Electronic Advances 7, 230230 (2024). doi: 10.29026/oea.2024.230230 |
| [57] | Qin, L. et al. Two-component gas sensor of time-division multiplexing technique based on QEPAS and LITES. IEEE Photonics Technology Letters 36, 1085-1088 (2024). doi: 10.1109/LPT.2024.3435733 |
| [58] | Sun, H. Y. et al. Highly sensitive CH4/C2H2 dual-gas light-induced thermoelastic spectroscopy sensor based on a dual-path multiring multipass cell and a circle-head quartz tuning fork. ACS Sensors 10, 4717-4724 (2025). doi: 10.1021/acssensors.5c01298 |
| [59] | Qin, L. et al. A dual-gas sensing system based on QEPAS and LITES. IEEE Sensors Journal 25, 21404-21411 (2025). doi: 10.1109/JSEN.2025.3561928 |
| [60] | Cheng, Y. P. et al. Differential laser-induced thermoelastic spectroscopy for dual-gas CO2/CH4 detection. Measurement 240, 115594 (2025). doi: 10.1016/j.measurement.2024.115594 |
| [61] | Wu, H. P. et al. Simultaneous dual-gas QEPAS detection based on a fundamental and overtone combined vibration of quartz tuning fork. Applied Physics Letters 110, 121104 (2017). doi: 10.1063/1.4979085 |
| [62] | Lang, Z. T. et al. Fast response and real-time simultaneous dual-component LITES sensor based on mode division multiplexing of IPSFFM and OPSFFM with a single QTF. Optics Letters 50, 2852-2855 (2025). doi: 10.1364/OL.561282 |