Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchability
Structural coloration using metasurfaces has been steadily researched to overcome the limitations of conventional color printing using pigments by improving the resolution, lowering the toxicity, and increasing the durability. Many metasurfaces have been demonstrated for dynamic structural coloratio...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2020-11-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2020-0440 |
| _version_ | 1811214343125073920 |
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| author | Jung Chunghwan Yang Younghwan Jang Jaehyuck Badloe Trevon Lee Taejun Mun Jungho Moon Seong-Won Rho Junsuk |
| author_facet | Jung Chunghwan Yang Younghwan Jang Jaehyuck Badloe Trevon Lee Taejun Mun Jungho Moon Seong-Won Rho Junsuk |
| author_sort | Jung Chunghwan |
| collection | DOAJ |
| description | Structural coloration using metasurfaces has been steadily researched to overcome the limitations of conventional color printing using pigments by improving the resolution, lowering the toxicity, and increasing the durability. Many metasurfaces have been demonstrated for dynamic structural coloration to convert images at the visible spectrum. However, the previous works cannot reach near-zero scattering when colors are turned-off, preventing it from being cryptographic applications. Herein, we propose a completely on/off switchable structural coloration with polarization-sensitive metasurfaces, enabling full-colored images to be displayed and hidden through the control of the polarization of incident light. It is confirmed that the nanostructure exhibits the polarization-dependent magnetic field distributions, and near-zero scattering is realized when the polarization of incident light is perpendicular to the long axis of the nanofins. Also, the metasurfaces are made up of triple-nanofin structures whose lengths affect locations of resonance peaks, resulting in full-color spectrum coverages. With such advantages, a QR code image, a two-color object image, and an overlapped dual-portrait image are obtained with the metasurfaces. Such demonstrations will provide potential applications in the fields of high-security information encryption, security tag, multichannel imaging, and dynamic displays. |
| first_indexed | 2024-04-12T06:01:42Z |
| format | Article |
| id | doaj.art-722e48b1a5154e99833271c04e699eb8 |
| institution | Directory Open Access Journal |
| issn | 2192-8606 2192-8614 |
| language | English |
| last_indexed | 2024-04-12T06:01:42Z |
| publishDate | 2020-11-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-722e48b1a5154e99833271c04e699eb82022-12-22T03:45:00ZengDe GruyterNanophotonics2192-86062192-86142020-11-0110291992610.1515/nanoph-2020-0440Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchabilityJung Chunghwan0Yang Younghwan1Jang Jaehyuck2Badloe Trevon3Lee Taejun4Mun Jungho5Moon Seong-Won6Rho Junsuk7Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of KoreaDepartment of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of KoreaDepartment of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of KoreaDepartment of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of KoreaDepartment of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of KoreaDepartment of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of KoreaDepartment of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of KoreaDepartment of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, Republic of KoreaStructural coloration using metasurfaces has been steadily researched to overcome the limitations of conventional color printing using pigments by improving the resolution, lowering the toxicity, and increasing the durability. Many metasurfaces have been demonstrated for dynamic structural coloration to convert images at the visible spectrum. However, the previous works cannot reach near-zero scattering when colors are turned-off, preventing it from being cryptographic applications. Herein, we propose a completely on/off switchable structural coloration with polarization-sensitive metasurfaces, enabling full-colored images to be displayed and hidden through the control of the polarization of incident light. It is confirmed that the nanostructure exhibits the polarization-dependent magnetic field distributions, and near-zero scattering is realized when the polarization of incident light is perpendicular to the long axis of the nanofins. Also, the metasurfaces are made up of triple-nanofin structures whose lengths affect locations of resonance peaks, resulting in full-color spectrum coverages. With such advantages, a QR code image, a two-color object image, and an overlapped dual-portrait image are obtained with the metasurfaces. Such demonstrations will provide potential applications in the fields of high-security information encryption, security tag, multichannel imaging, and dynamic displays.https://doi.org/10.1515/nanoph-2020-0440anticounterfeitingcryptographydynamic metasurfacefull-color displaystructural colorswitchable metasurface |
| spellingShingle | Jung Chunghwan Yang Younghwan Jang Jaehyuck Badloe Trevon Lee Taejun Mun Jungho Moon Seong-Won Rho Junsuk Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchability Nanophotonics anticounterfeiting cryptography dynamic metasurface full-color display structural color switchable metasurface |
| title | Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchability |
| title_full | Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchability |
| title_fullStr | Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchability |
| title_full_unstemmed | Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchability |
| title_short | Near-zero reflection of all-dielectric structural coloration enabling polarization-sensitive optical encryption with enhanced switchability |
| title_sort | near zero reflection of all dielectric structural coloration enabling polarization sensitive optical encryption with enhanced switchability |
| topic | anticounterfeiting cryptography dynamic metasurface full-color display structural color switchable metasurface |
| url | https://doi.org/10.1515/nanoph-2020-0440 |
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