Electrically tunable steganographic nano-optical coatings
Thin film coatings with tunable colors have a broad range of applications, from solid-state reflective displays to steganography. Here, we propose a novel approach to chalcogenide phase change material (PCM)-incorporated steganographic nano-optical coatings (SNOC) as thin film color reflectors for o...
| Principais autores: | , , , |
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| Outros Autores: | |
| Formato: | Journal Article |
| Idioma: | English |
| Publicado em: |
2023
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| Assuntos: | |
| Acesso em linha: | https://hdl.handle.net/10356/170324 |
| _version_ | 1826130671883517952 |
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| author | Prabhathan, Patinharekandy Sreekanth, Kandammathe Valiyaveedu Teng, Jinghua Singh, Ranjan |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Prabhathan, Patinharekandy Sreekanth, Kandammathe Valiyaveedu Teng, Jinghua Singh, Ranjan |
| author_sort | Prabhathan, Patinharekandy |
| collection | NTU |
| description | Thin film coatings with tunable colors have a broad range of applications, from solid-state reflective displays to steganography. Here, we propose a novel approach to chalcogenide phase change material (PCM)-incorporated steganographic nano-optical coatings (SNOC) as thin film color reflectors for optical steganography. The proposed SNOC design combines a broad-band and a narrow-band absorber made up of PCMs to achieve tunable optical Fano resonance in the visible wavelength, which is a scalable platform for accessing the full-color range. We demonstrate that the line width of the Fano resonance can be dynamically tuned by switching the structural phase of PCM from amorphous to crystalline, which is crucial for obtaining high-purity colors. For steganography applications, the cavity layer of SNOC is divided into an ultralow loss PCM and a high index dielectric material with identical optical thickness. We show that electrically tunable color pixels can be fabricated using the SNOC on a microheater device. |
| first_indexed | 2024-10-01T07:59:44Z |
| format | Journal Article |
| id | ntu-10356/170324 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:59:44Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1703242023-09-07T02:51:05Z Electrically tunable steganographic nano-optical coatings Prabhathan, Patinharekandy Sreekanth, Kandammathe Valiyaveedu Teng, Jinghua Singh, Ranjan School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute Science::Physics Color Filters Fano Resonance Thin film coatings with tunable colors have a broad range of applications, from solid-state reflective displays to steganography. Here, we propose a novel approach to chalcogenide phase change material (PCM)-incorporated steganographic nano-optical coatings (SNOC) as thin film color reflectors for optical steganography. The proposed SNOC design combines a broad-band and a narrow-band absorber made up of PCMs to achieve tunable optical Fano resonance in the visible wavelength, which is a scalable platform for accessing the full-color range. We demonstrate that the line width of the Fano resonance can be dynamically tuned by switching the structural phase of PCM from amorphous to crystalline, which is crucial for obtaining high-purity colors. For steganography applications, the cavity layer of SNOC is divided into an ultralow loss PCM and a high index dielectric material with identical optical thickness. We show that electrically tunable color pixels can be fabricated using the SNOC on a microheater device. Agency for Science, Technology and Research (A*STAR) National Research Foundation (NRF) R.S. acknowledges the funding support from the National Research Foundation Singapore (Award No. NRF-CRP23-2019-0005). J.T. acknowledges the funding support from the National Research Foundation Singapore under CRP program (Grant No. NRF-CRP26-2021-0004), A*STAR (Agency for Science, Technology and Research) under AME IRG Program (Grant No. A2083c0058), and HBMS IAF-PP (Grant No. H19H6a0025). 2023-09-07T02:51:05Z 2023-09-07T02:51:05Z 2023 Journal Article Prabhathan, P., Sreekanth, K. V., Teng, J. & Singh, R. (2023). Electrically tunable steganographic nano-optical coatings. Nano Letters, 23(11), 5236-5241. https://dx.doi.org/10.1021/acs.nanolett.3c01244 1530-6984 https://hdl.handle.net/10356/170324 10.1021/acs.nanolett.3c01244 37200154 2-s2.0-85160776244 11 23 5236 5241 en NRF-CRP23-2019-0005 NRF-CRP26-2021-0004 A2083c0058 H19H6a0025 Nano Letters © 2023 American Chemical Society. All rights reserved. |
| spellingShingle | Science::Physics Color Filters Fano Resonance Prabhathan, Patinharekandy Sreekanth, Kandammathe Valiyaveedu Teng, Jinghua Singh, Ranjan Electrically tunable steganographic nano-optical coatings |
| title | Electrically tunable steganographic nano-optical coatings |
| title_full | Electrically tunable steganographic nano-optical coatings |
| title_fullStr | Electrically tunable steganographic nano-optical coatings |
| title_full_unstemmed | Electrically tunable steganographic nano-optical coatings |
| title_short | Electrically tunable steganographic nano-optical coatings |
| title_sort | electrically tunable steganographic nano optical coatings |
| topic | Science::Physics Color Filters Fano Resonance |
| url | https://hdl.handle.net/10356/170324 |
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