Theoretical study of microcavity-enhanced absorption spectroscopy for mid-infrared methane detection using a chalcogenide/silica-on-fluoride horizontal slot-waveguide racetrack resonator
文献类型：期刊论文
| 作者 | M. Q. Pi,C. T. Zheng,Z. H. Peng,H. Zhao,J. M. Lang,L. Liang,Y. Zhang,Y. D. Wang and F. K. Tittel |
| 刊名 | Optics Express
 |
| 出版日期 | 2020 |
| 卷号 | 28期号:15页码:21432-21446 |
| ISSN号 | 1094-4087 |
| DOI | 10.1364/oe.396177 |
| 英文摘要 | The reported chalcogenide (ChG) rectangular waveguide sensors with a small evanescent field need a large waveguide length to obtain an enhanced light-gas interaction effect. To make such sensors compact and improve the light-gas interaction effect, a microcavity-enhanced absorption spectroscopy technique for methane (CH4) detection was proposed using a mid-infrared chalcogenide/silica-on-fluoride horizontal slot-waveguide racetrack resonator. For the horizontal slot waveguide, an equivalent sensor model (ESM) and related formulations were proposed to simplify the analysis of the racetrack resonator sensor model (RRSM), and the ESM was verified through a comparison between the theoretical result of ESM and the simulation result of RRSM based on the finite element method (FEM). Due to the use of a chalcogenide/silica-on-fluoride horizontal slot-waveguide structure, the waveguide parameters were optimized to obtain a high power confinement factor of 44.63% at the wavelength of 3291 nm, which is at least 5 times higher than other ChG rectangular waveguides. The waveguide length is reduced at least 30 times due to the use of the optimized chalcogenide/silica-on-fluoride horizontal slot-waveguide and racetrack resonator. The limit of detection (LoD) is 3.87 ppm with an intrinsic waveguide loss of 3 dB/cm and an amplitude coupling ratio of 0.1 for the resonator. The response time is less than 5 mu s due to the small light-gas interaction area. The influences of environmental pressure and waveguide intrinsic loss on the sensing characteristics were discussed. The compact racetrack resonator sensor structure and equivalent analytical model can also be adopted in the design of an on-chip waveguide sensor for the detection of other gas species. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/64954]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | M. Q. Pi,C. T. Zheng,Z. H. Peng,H. Zhao,J. M. Lang,L. Liang,Y. Zhang,Y. D. Wang and F. K. Tittel. Theoretical study of microcavity-enhanced absorption spectroscopy for mid-infrared methane detection using a chalcogenide/silica-on-fluoride horizontal slot-waveguide racetrack resonator[J]. Optics Express,2020,28(15):21432-21446. |
| APA | M. Q. Pi,C. T. Zheng,Z. H. Peng,H. Zhao,J. M. Lang,L. Liang,Y. Zhang,Y. D. Wang and F. K. Tittel.(2020).Theoretical study of microcavity-enhanced absorption spectroscopy for mid-infrared methane detection using a chalcogenide/silica-on-fluoride horizontal slot-waveguide racetrack resonator.Optics Express,28(15),21432-21446. |
| MLA | M. Q. Pi,C. T. Zheng,Z. H. Peng,H. Zhao,J. M. Lang,L. Liang,Y. Zhang,Y. D. Wang and F. K. Tittel."Theoretical study of microcavity-enhanced absorption spectroscopy for mid-infrared methane detection using a chalcogenide/silica-on-fluoride horizontal slot-waveguide racetrack resonator".Optics Express 28.15(2020):21432-21446. |
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