Fast electrical spatial light modulation in quantum confined Stark heterostructure metasurfaces
Semiconductor-based tunable metasurfaces offer a versatile solution for dynamic light control, attracting significant research interest. However, current designs face the challenge of limited modulation speeds, typically in the MHz range. Here, we propose a multiple-quantum-well-based mid-infrared t...
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| Format: | Thesis-Master by Coursework |
| Language: | English |
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Nanyang Technological University
2024
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| Online Access: | https://hdl.handle.net/10356/179103 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Semiconductor-based tunable metasurfaces offer a versatile solution for dynamic light control, attracting significant research interest. However, current designs face the challenge of limited modulation speeds, typically in the MHz range. Here, we propose a multiple-quantum-well-based mid-infrared tunable metasurface with Mie resonance, realizing an experimental modulation speed of approximately 1 GHz. Electrical tuning is accomplished by quantum-confined Stark effect, utilizing electron resonant tunneling between two coupled quantum wells which is adjustable by voltage. This performance holds potential for high-speed optical communication, dynamic beam shaping, as well as advanced photonic devices. |
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