Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation
The third-order nonlinear processes in nanophotonic devices may have great potentials for developing ultra-compact nonlinear optical sources, ultrafast optical switches and modulators, etc. It is known that the performance of the nonlinear nanophotonic devices strongly relies on the optical resonanc...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac3317 |
| _version_ | 1827872615704821760 |
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| author | Yang Li Xuecai Zhang Yutao Tang Wenfeng Cai Kuan Liu Ningbin Mao Kingfai Li Junhong Deng Yanjun Liu Tun Cao Guixin Li |
| author_facet | Yang Li Xuecai Zhang Yutao Tang Wenfeng Cai Kuan Liu Ningbin Mao Kingfai Li Junhong Deng Yanjun Liu Tun Cao Guixin Li |
| author_sort | Yang Li |
| collection | DOAJ |
| description | The third-order nonlinear processes in nanophotonic devices may have great potentials for developing ultra-compact nonlinear optical sources, ultrafast optical switches and modulators, etc. It is known that the performance of the nonlinear nanophotonic devices strongly relies on the optical resonances and the selection of appropriate nonlinear materials. Here, we demonstrate that the third harmonic generations (THG) can be greatly enhanced at subwavelength scale by incorporating α-Ge _2 Sb _2 Te _5 (α-GST) into the nanocavity metasurface. Under pumping of a near-infrared femtosecond laser, the THG from the nanocavity metasurface is ∼50 times stronger than that from the bare GST planar film. In addition, the nanocavity metasurface also provides a powerful platform for characterizing the third-order nonlinear susceptibility of the active medium in the cavity. We expect that the GST-based nanocavity metasurface could open new routes for achieving high efficiency nonlinear nanophotonic devices. |
| first_indexed | 2024-03-12T16:26:18Z |
| format | Article |
| id | doaj.art-438f8473a60242dea280ce08c6f9f61d |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:26:18Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-438f8473a60242dea280ce08c6f9f61d2023-08-08T15:42:04ZengIOP PublishingNew Journal of Physics1367-26302021-01-01231111500910.1088/1367-2630/ac3317Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generationYang Li0Xuecai Zhang1Yutao Tang2Wenfeng Cai3Kuan Liu4Ningbin Mao5Kingfai Li6Junhong Deng7Yanjun Liu8https://orcid.org/0000-0001-8724-0434Tun Cao9https://orcid.org/0000-0003-3536-0092Guixin Li10School of Biomedical Engineering, Dalian University of Technology , Dalian, 116024, People’s Republic of China; Department of Materials Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of China; Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of ChinaDepartment of Electrical and Electronic Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of ChinaSchool of Biomedical Engineering, Dalian University of Technology , Dalian, 116024, People’s Republic of ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of China; Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of ChinaDepartment of Electrical and Electronic Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of ChinaSchool of Biomedical Engineering, Dalian University of Technology , Dalian, 116024, People’s Republic of ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of China; Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology , Shenzhen, 518055, People’s Republic of China; Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices, Southern University of Science and Technology , Shenzhen 518055, People’s Republic of ChinaThe third-order nonlinear processes in nanophotonic devices may have great potentials for developing ultra-compact nonlinear optical sources, ultrafast optical switches and modulators, etc. It is known that the performance of the nonlinear nanophotonic devices strongly relies on the optical resonances and the selection of appropriate nonlinear materials. Here, we demonstrate that the third harmonic generations (THG) can be greatly enhanced at subwavelength scale by incorporating α-Ge _2 Sb _2 Te _5 (α-GST) into the nanocavity metasurface. Under pumping of a near-infrared femtosecond laser, the THG from the nanocavity metasurface is ∼50 times stronger than that from the bare GST planar film. In addition, the nanocavity metasurface also provides a powerful platform for characterizing the third-order nonlinear susceptibility of the active medium in the cavity. We expect that the GST-based nanocavity metasurface could open new routes for achieving high efficiency nonlinear nanophotonic devices.https://doi.org/10.1088/1367-2630/ac3317nanocavitymetasurfacethird harmonic generationplasmonics |
| spellingShingle | Yang Li Xuecai Zhang Yutao Tang Wenfeng Cai Kuan Liu Ningbin Mao Kingfai Li Junhong Deng Yanjun Liu Tun Cao Guixin Li Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation New Journal of Physics nanocavity metasurface third harmonic generation plasmonics |
| title | Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation |
| title_full | Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation |
| title_fullStr | Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation |
| title_full_unstemmed | Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation |
| title_short | Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation |
| title_sort | ge2sb2te5 based nanocavity metasurface for enhancement of third harmonic generation |
| topic | nanocavity metasurface third harmonic generation plasmonics |
| url | https://doi.org/10.1088/1367-2630/ac3317 |
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