Highly sensitive and selective gas sensing using the defect mode of a compact terahertz photonic crystal cavity
文献类型：期刊论文
| 作者 | Shi, Xiaomei2; Zhao, Zongshan3 ; Han, Zhanghua1
|
| 刊名 | SENSORS AND ACTUATORS B-CHEMICAL
 |
| 出版日期 | 2018-11-20 |
| 卷号 | 274页码:188-193 |
| 关键词 | Gas sensor Terahertz spectroscopy Photonic crystal cavity Fabry-Perot |
| ISSN号 | 0925-4005 |
| DOI | 10.1016/j.snb.2018.07.156 |
| 英文摘要 | The photon energies corresponding to the pure rotational transitions of small polar compounds fall into the terahertz regime, which suggests a high potential of terahertz technology in gas detection, particularly for toxic gases. However, the weak dipole moments caused by pure rotational transitions severely limit the gas detectability at low concentration, leading to the requirement of a long gas cell. Here, we present a highly sensitive and selective detection method using photonic crystal cavity defect mode with the resonance tailored to the characteristic absorption peak of the target gas specimen. The cavity resonance will experience decaying only when the target gas is introduced, and then can be used to exclusively detect the target gas. Numerical calculations show that due to the high dependence of the defect mode transmittance on the specimen absorption at the same frequency, a toxic gas-hydrogen cyanide (HCN) with concentration of only 2 ppm in air under the standard atmospheric pressure of 1 atm can be identified using a photonic crystal cavity with the overall length around 5 mm, two orders of magnitude shorter than the pipe gas cell used in the regular transmission method. |
| WOS关键词 | BANDGAP FIBER ; SENSOR ; SPECTROSCOPY ; TECHNOLOGY ; SYSTEM ; LASER ; TIME |
| WOS研究方向 | Chemistry ; Electrochemistry ; Instruments & Instrumentation |
| 语种 | 英语 |
| WOS记录号 | WOS:000443960000022 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://ir.qibebt.ac.cn/handle/337004/11921]  |
| 专题 | 中国科学院青岛生物能源与过程研究所 |
| 通讯作者 | Han, Zhanghua |
| 作者单位 | 1.Nanjing Univ Sci & Technol, Adv Launching Coinnovat Ctr, Nanjing 210094, Jiangsu, Peoples R China 2.China Jiliang Univ, Lab Terahertz Photon, Hangzhou 310018, Zhejiang, Peoples R China 3.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi, Xiaomei,Zhao, Zongshan,Han, Zhanghua. Highly sensitive and selective gas sensing using the defect mode of a compact terahertz photonic crystal cavity[J]. SENSORS AND ACTUATORS B-CHEMICAL,2018,274:188-193. |
| APA | Shi, Xiaomei,Zhao, Zongshan,&Han, Zhanghua.(2018).Highly sensitive and selective gas sensing using the defect mode of a compact terahertz photonic crystal cavity.SENSORS AND ACTUATORS B-CHEMICAL,274,188-193. |
| MLA | Shi, Xiaomei,et al."Highly sensitive and selective gas sensing using the defect mode of a compact terahertz photonic crystal cavity".SENSORS AND ACTUATORS B-CHEMICAL 274(2018):188-193. |
入库方式： OAI收割
来源：青岛生物能源与过程研究所
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