Analysis of Giant Reflectance Tuning Enabled by Unidirectional Guided Resonance With Embedded Absorber
Achieving giant reflectance tuning is essential for various applications, including optical communication, switching, processing, and sensing. While optical resonances effectively enhance light-matter interactions, their inherent dispersive nature limits the maximum achievable reflectance tunability...
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2025-01-01
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| Series: | IEEE Photonics Journal |
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| author | Yuefeng Hu Zixuan Zhang Chenxingyu Huang Qian Li H. Y. Fu Chao Peng |
| author_facet | Yuefeng Hu Zixuan Zhang Chenxingyu Huang Qian Li H. Y. Fu Chao Peng |
| author_sort | Yuefeng Hu |
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| description | Achieving giant reflectance tuning is essential for various applications, including optical communication, switching, processing, and sensing. While optical resonances effectively enhance light-matter interactions, their inherent dispersive nature limits the maximum achievable reflectance tunability at the resonant frequency. To overcome this challenge, we propose utilizing unidirectional guided resonances (UGRs) to deterministically close leaky channels, thereby concentrating energy flow in the desired direction. Through systematic analysis, we compare the reflectance response of UGRs with conventional guided resonances incorporating embedded absorbers, demonstrating that reflectance tunability can theoretically approach unity under ideal conditions. Furthermore, we introduce a realistic design incorporating electrically controlled indium tin oxide (ITO) with the epsilon-near-zero (ENZ) effect as an embedded absorber. Despite the absorbing layer being thinner than <inline-formula><tex-math notation="LaTeX">$1\,\text{nm}$</tex-math></inline-formula>, the theory and simulation show that our design can support a reflectance tunability of 0.76 under a driving voltage of <inline-formula><tex-math notation="LaTeX">$3\,\text{V}$</tex-math></inline-formula>. This approach presents a promising strategy for expanding the range of reflectance variations, enabling advancements in optical communication, computing, and beyond. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
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| series | IEEE Photonics Journal |
| spelling | doaj-art-e9dc6886d5924516ba69a317ae6c01cb2025-08-20T03:40:17ZengIEEEIEEE Photonics Journal1943-06552025-01-011751810.1109/JPHOT.2025.359189511091360Analysis of Giant Reflectance Tuning Enabled by Unidirectional Guided Resonance With Embedded AbsorberYuefeng Hu0Zixuan Zhang1https://orcid.org/0009-0008-8958-4917Chenxingyu Huang2https://orcid.org/0000-0003-0095-6523Qian Li3H. Y. Fu4https://orcid.org/0000-0002-4276-0011Chao Peng5https://orcid.org/0000-0002-0200-0798Peking University Shenzhen Graduate School, Peking University, Shenzhen, ChinaState Key Laboratory of Photonics and Communications, School of Electronics & Frontiers Science Center for Nano-optoelectronics, Peking University, Beijing, ChinaTsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, ChinaSchool of Electronic and Computer Engineering, Peking University, Shenzhen, ChinaTsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, ChinaState Key Laboratory of Photonics and Communications, School of Electronics & Frontiers Science Center for Nano-optoelectronics, Peking University, Beijing, ChinaAchieving giant reflectance tuning is essential for various applications, including optical communication, switching, processing, and sensing. While optical resonances effectively enhance light-matter interactions, their inherent dispersive nature limits the maximum achievable reflectance tunability at the resonant frequency. To overcome this challenge, we propose utilizing unidirectional guided resonances (UGRs) to deterministically close leaky channels, thereby concentrating energy flow in the desired direction. Through systematic analysis, we compare the reflectance response of UGRs with conventional guided resonances incorporating embedded absorbers, demonstrating that reflectance tunability can theoretically approach unity under ideal conditions. Furthermore, we introduce a realistic design incorporating electrically controlled indium tin oxide (ITO) with the epsilon-near-zero (ENZ) effect as an embedded absorber. Despite the absorbing layer being thinner than <inline-formula><tex-math notation="LaTeX">$1\,\text{nm}$</tex-math></inline-formula>, the theory and simulation show that our design can support a reflectance tunability of 0.76 under a driving voltage of <inline-formula><tex-math notation="LaTeX">$3\,\text{V}$</tex-math></inline-formula>. This approach presents a promising strategy for expanding the range of reflectance variations, enabling advancements in optical communication, computing, and beyond.https://ieeexplore.ieee.org/document/11091360/Giant reflectance tuningunidirectional guided resonances (UGRs)embedded absorberepsilon-near-zero (ENZ) |
| spellingShingle | Yuefeng Hu Zixuan Zhang Chenxingyu Huang Qian Li H. Y. Fu Chao Peng Analysis of Giant Reflectance Tuning Enabled by Unidirectional Guided Resonance With Embedded Absorber IEEE Photonics Journal Giant reflectance tuning unidirectional guided resonances (UGRs) embedded absorber epsilon-near-zero (ENZ) |
| title | Analysis of Giant Reflectance Tuning Enabled by Unidirectional Guided Resonance With Embedded Absorber |
| title_full | Analysis of Giant Reflectance Tuning Enabled by Unidirectional Guided Resonance With Embedded Absorber |
| title_fullStr | Analysis of Giant Reflectance Tuning Enabled by Unidirectional Guided Resonance With Embedded Absorber |
| title_full_unstemmed | Analysis of Giant Reflectance Tuning Enabled by Unidirectional Guided Resonance With Embedded Absorber |
| title_short | Analysis of Giant Reflectance Tuning Enabled by Unidirectional Guided Resonance With Embedded Absorber |
| title_sort | analysis of giant reflectance tuning enabled by unidirectional guided resonance with embedded absorber |
| topic | Giant reflectance tuning unidirectional guided resonances (UGRs) embedded absorber epsilon-near-zero (ENZ) |
| url | https://ieeexplore.ieee.org/document/11091360/ |
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