Terahertz gas sensor based on absorption-induced transparency
A system for the detection of spectral signatures of gases at the Terahertz regime is presented. The system consists in an initially opaque holey metal film whereby the introduction of a gas provokes the appearance of spectral features in transmission and reflection, due to the phenomenom of absorpt...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2016-01-01
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| Series: | EPJ Applied Metamaterials |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1051/epjam/2016013 |
| _version_ | 1818368534731816960 |
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| author | Rodrigo Sergio G. |
| author_facet | Rodrigo Sergio G. |
| author_sort | Rodrigo Sergio G. |
| collection | DOAJ |
| description | A system for the detection of spectral signatures of gases at the Terahertz regime is presented. The system consists in an initially opaque holey metal film whereby the introduction of a gas provokes the appearance of spectral features in transmission and reflection, due to the phenomenom of absorption-induced transparency (AIT). The peaks in transmission and dips in reflection observed in AIT occur close to the absorption energies of the molecules, hence its name. The presence of the gas would be thus revealed as a strong drop in reflectivity measurements at one (or several) of the gas absorption resonances. As a proof of principle, we theoretically demonstrate how the AIT-based sensor would serve to detect tiny amounts of hydrocyanic acid. |
| first_indexed | 2024-12-13T23:09:29Z |
| format | Article |
| id | doaj.art-91a69e70e7404179bea4b37fc21b009b |
| institution | Directory Open Access Journal |
| issn | 2272-2394 |
| language | English |
| last_indexed | 2024-12-13T23:09:29Z |
| publishDate | 2016-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Applied Metamaterials |
| spelling | doaj.art-91a69e70e7404179bea4b37fc21b009b2022-12-21T23:28:09ZengEDP SciencesEPJ Applied Metamaterials2272-23942016-01-0131110.1051/epjam/2016013epjam160014Terahertz gas sensor based on absorption-induced transparencyRodrigo Sergio G.A system for the detection of spectral signatures of gases at the Terahertz regime is presented. The system consists in an initially opaque holey metal film whereby the introduction of a gas provokes the appearance of spectral features in transmission and reflection, due to the phenomenom of absorption-induced transparency (AIT). The peaks in transmission and dips in reflection observed in AIT occur close to the absorption energies of the molecules, hence its name. The presence of the gas would be thus revealed as a strong drop in reflectivity measurements at one (or several) of the gas absorption resonances. As a proof of principle, we theoretically demonstrate how the AIT-based sensor would serve to detect tiny amounts of hydrocyanic acid.http://dx.doi.org/10.1051/epjam/2016013MetamaterialsDiffraction gratingsTerahertz sensingAbsorption-induced transparency |
| spellingShingle | Rodrigo Sergio G. Terahertz gas sensor based on absorption-induced transparency EPJ Applied Metamaterials Metamaterials Diffraction gratings Terahertz sensing Absorption-induced transparency |
| title | Terahertz gas sensor based on absorption-induced transparency |
| title_full | Terahertz gas sensor based on absorption-induced transparency |
| title_fullStr | Terahertz gas sensor based on absorption-induced transparency |
| title_full_unstemmed | Terahertz gas sensor based on absorption-induced transparency |
| title_short | Terahertz gas sensor based on absorption-induced transparency |
| title_sort | terahertz gas sensor based on absorption induced transparency |
| topic | Metamaterials Diffraction gratings Terahertz sensing Absorption-induced transparency |
| url | http://dx.doi.org/10.1051/epjam/2016013 |
| work_keys_str_mv | AT rodrigosergiog terahertzgassensorbasedonabsorptioninducedtransparency |