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Observation of Coherent Perfect Absorption in Oil Film on Water Surface and Sensitive Detection of Refractive Index Anisotropy in the Film
[Image: see text] Sharp reflection dips of 50% were observed when white light was incident from the side of a cell on a 1 μm thick film of silicone oil (polydimethylsiloxane, PDMS, nearly transparent in visible light, with the extinction coefficient κ ≈ 0.0001) above a water surface in the cell so t...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10433521/ https://www.ncbi.nlm.nih.gov/pubmed/37528095 http://dx.doi.org/10.1021/acs.langmuir.3c01189 |
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author | Hasegawa, Mayu Oi, Junpei Yamashita, Kyohei Seto, Keisuke Kobayashi, Takayoshi Tokunaga, Eiji |
author_facet | Hasegawa, Mayu Oi, Junpei Yamashita, Kyohei Seto, Keisuke Kobayashi, Takayoshi Tokunaga, Eiji |
author_sort | Hasegawa, Mayu |
collection | PubMed |
description | [Image: see text] Sharp reflection dips of 50% were observed when white light was incident from the side of a cell on a 1 μm thick film of silicone oil (polydimethylsiloxane, PDMS, nearly transparent in visible light, with the extinction coefficient κ ≈ 0.0001) above a water surface in the cell so that the total reflection condition was satisfied at the oil-air interface. This is the first observation of a coherent perfect absorption (CPA) phenomenon in liquid. The experimental results can be reproduced by the Fresnel reflectance of the monolayer film, but the wavelength positions at which the dip appears for s-polarized and p-polarized light are reversed if the refractive index of the oil film is assumed to be isotropic. The experimental results were correctly reproduced by assuming that the extraordinary-ray refractive index (light polarized perpendicular to the interface) is 1% larger than the ordinary-ray refractive index (light polarized parallel to the interface). This indicates that the polarization dependence of the CPA phenomenon is extremely sensitive to the difference between the in-plane and out-of-plane refractive indices of the thin film. |
format | Online Article Text |
id | pubmed-10433521 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-104335212023-08-18 Observation of Coherent Perfect Absorption in Oil Film on Water Surface and Sensitive Detection of Refractive Index Anisotropy in the Film Hasegawa, Mayu Oi, Junpei Yamashita, Kyohei Seto, Keisuke Kobayashi, Takayoshi Tokunaga, Eiji Langmuir [Image: see text] Sharp reflection dips of 50% were observed when white light was incident from the side of a cell on a 1 μm thick film of silicone oil (polydimethylsiloxane, PDMS, nearly transparent in visible light, with the extinction coefficient κ ≈ 0.0001) above a water surface in the cell so that the total reflection condition was satisfied at the oil-air interface. This is the first observation of a coherent perfect absorption (CPA) phenomenon in liquid. The experimental results can be reproduced by the Fresnel reflectance of the monolayer film, but the wavelength positions at which the dip appears for s-polarized and p-polarized light are reversed if the refractive index of the oil film is assumed to be isotropic. The experimental results were correctly reproduced by assuming that the extraordinary-ray refractive index (light polarized perpendicular to the interface) is 1% larger than the ordinary-ray refractive index (light polarized parallel to the interface). This indicates that the polarization dependence of the CPA phenomenon is extremely sensitive to the difference between the in-plane and out-of-plane refractive indices of the thin film. American Chemical Society 2023-08-01 /pmc/articles/PMC10433521/ /pubmed/37528095 http://dx.doi.org/10.1021/acs.langmuir.3c01189 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Hasegawa, Mayu Oi, Junpei Yamashita, Kyohei Seto, Keisuke Kobayashi, Takayoshi Tokunaga, Eiji Observation of Coherent Perfect Absorption in Oil Film on Water Surface and Sensitive Detection of Refractive Index Anisotropy in the Film |
title | Observation of Coherent Perfect Absorption in Oil
Film on Water Surface and Sensitive Detection of Refractive Index
Anisotropy in the Film |
title_full | Observation of Coherent Perfect Absorption in Oil
Film on Water Surface and Sensitive Detection of Refractive Index
Anisotropy in the Film |
title_fullStr | Observation of Coherent Perfect Absorption in Oil
Film on Water Surface and Sensitive Detection of Refractive Index
Anisotropy in the Film |
title_full_unstemmed | Observation of Coherent Perfect Absorption in Oil
Film on Water Surface and Sensitive Detection of Refractive Index
Anisotropy in the Film |
title_short | Observation of Coherent Perfect Absorption in Oil
Film on Water Surface and Sensitive Detection of Refractive Index
Anisotropy in the Film |
title_sort | observation of coherent perfect absorption in oil
film on water surface and sensitive detection of refractive index
anisotropy in the film |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10433521/ https://www.ncbi.nlm.nih.gov/pubmed/37528095 http://dx.doi.org/10.1021/acs.langmuir.3c01189 |
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