Coherent Perfect Absorption in a Transparent Polymer Film on a Transparent Substrate Utilizing Total Internal Reflection by Grazing Incidence
A simple scheme for single-channel coherent perfect absorption (CPA) of transparent materials is proposed and experimentally realized using total internal reflection by grazing incidence, with a single dielectric layer sandwiched by semi-infinite dielectric layers. In a 1.48-µm thick polyvinylpyrrol...
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MDPI AG
2022-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/7/3633 |
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| author | Mayu Hasegawa Junpei Oi Kyohei Yamashita Keisuke Seto Takayoshi Kobayashi Eiji Tokunaga |
| author_facet | Mayu Hasegawa Junpei Oi Kyohei Yamashita Keisuke Seto Takayoshi Kobayashi Eiji Tokunaga |
| author_sort | Mayu Hasegawa |
| collection | DOAJ |
| description | A simple scheme for single-channel coherent perfect absorption (CPA) of transparent materials is proposed and experimentally realized using total internal reflection by grazing incidence, with a single dielectric layer sandwiched by semi-infinite dielectric layers. In a 1.48-µm thick polyvinylpyrrolidone (PVP) film, dip-coated on a MgF<sub>2</sub> substrate both transparent in the visible, reflectance dips due to nearly 90% absorption by single-channel CPA were observed in the wavelength range of 370–800 nm, with white light from a Xe lamp incident on the side face of the substrate and extracted from the other side through multiple reflections in the PVP layer. This is a simple and inexpensive CPA scheme, and it is expected to have various applications by changing the substrate/polymer material or dispersing molecules in the polymer film. This paper also provides a design guideline for grazing-incidence waveguide-mode sensors using transparent dielectric materials. |
| first_indexed | 2024-03-09T12:05:49Z |
| format | Article |
| id | doaj.art-84594e5d6c02480b84e9abeeb5b5531f |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T12:05:49Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-84594e5d6c02480b84e9abeeb5b5531f2023-11-30T22:58:26ZengMDPI AGApplied Sciences2076-34172022-04-01127363310.3390/app12073633Coherent Perfect Absorption in a Transparent Polymer Film on a Transparent Substrate Utilizing Total Internal Reflection by Grazing IncidenceMayu Hasegawa0Junpei Oi1Kyohei Yamashita2Keisuke Seto3Takayoshi Kobayashi4Eiji Tokunaga5Department of Physics, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, JapanDepartment of Physics, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, JapanDepartment of Physics, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, JapanDepartment of Physics, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, JapanAdvanced Ultrafast Laser Research Center, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu 182-8585, Tokyo, JapanDepartment of Physics, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, JapanA simple scheme for single-channel coherent perfect absorption (CPA) of transparent materials is proposed and experimentally realized using total internal reflection by grazing incidence, with a single dielectric layer sandwiched by semi-infinite dielectric layers. In a 1.48-µm thick polyvinylpyrrolidone (PVP) film, dip-coated on a MgF<sub>2</sub> substrate both transparent in the visible, reflectance dips due to nearly 90% absorption by single-channel CPA were observed in the wavelength range of 370–800 nm, with white light from a Xe lamp incident on the side face of the substrate and extracted from the other side through multiple reflections in the PVP layer. This is a simple and inexpensive CPA scheme, and it is expected to have various applications by changing the substrate/polymer material or dispersing molecules in the polymer film. This paper also provides a design guideline for grazing-incidence waveguide-mode sensors using transparent dielectric materials.https://www.mdpi.com/2076-3417/12/7/3633coherent perfect absorptiontotal internal reflectionFabry–Perot resonatortransparent dielectric layercritical couplingcomplex refractive index |
| spellingShingle | Mayu Hasegawa Junpei Oi Kyohei Yamashita Keisuke Seto Takayoshi Kobayashi Eiji Tokunaga Coherent Perfect Absorption in a Transparent Polymer Film on a Transparent Substrate Utilizing Total Internal Reflection by Grazing Incidence Applied Sciences coherent perfect absorption total internal reflection Fabry–Perot resonator transparent dielectric layer critical coupling complex refractive index |
| title | Coherent Perfect Absorption in a Transparent Polymer Film on a Transparent Substrate Utilizing Total Internal Reflection by Grazing Incidence |
| title_full | Coherent Perfect Absorption in a Transparent Polymer Film on a Transparent Substrate Utilizing Total Internal Reflection by Grazing Incidence |
| title_fullStr | Coherent Perfect Absorption in a Transparent Polymer Film on a Transparent Substrate Utilizing Total Internal Reflection by Grazing Incidence |
| title_full_unstemmed | Coherent Perfect Absorption in a Transparent Polymer Film on a Transparent Substrate Utilizing Total Internal Reflection by Grazing Incidence |
| title_short | Coherent Perfect Absorption in a Transparent Polymer Film on a Transparent Substrate Utilizing Total Internal Reflection by Grazing Incidence |
| title_sort | coherent perfect absorption in a transparent polymer film on a transparent substrate utilizing total internal reflection by grazing incidence |
| topic | coherent perfect absorption total internal reflection Fabry–Perot resonator transparent dielectric layer critical coupling complex refractive index |
| url | https://www.mdpi.com/2076-3417/12/7/3633 |
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