Low-Threshold and High-Extinction-Ratio Optical Bistability within a Graphene-Based Perfect Absorber
A kind of graphene-based perfect absorber which can generate low-threshold and high-extinction-ratio optical bistability in the near-IR band is proposed and simulated with numerical methods. The interaction between input light and monolayer graphene in the absorber can be greatly enhanced due to the...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-01-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/13/3/389 |
| _version_ | 1827759680929136640 |
|---|---|
| author | Zhengzhuo Zhang Qiaoge Sun Yansong Fan Zhihong Zhu Jianfa Zhang Xiaodong Yuan Chucai Guo |
| author_facet | Zhengzhuo Zhang Qiaoge Sun Yansong Fan Zhihong Zhu Jianfa Zhang Xiaodong Yuan Chucai Guo |
| author_sort | Zhengzhuo Zhang |
| collection | DOAJ |
| description | A kind of graphene-based perfect absorber which can generate low-threshold and high-extinction-ratio optical bistability in the near-IR band is proposed and simulated with numerical methods. The interaction between input light and monolayer graphene in the absorber can be greatly enhanced due to the perfect absorption. The large nonlinear coefficient of graphene and the strong light-graphene interaction contribute to the nonlinear response of the structure, leading to relatively low switching thresholds of less than 2.5 MW/cm<sup>2</sup> for an absorber with a <i>Q</i> factor lower than 1000. Meanwhile, the extinction ratio of bistable states in the absorber reaches an ultrahigh value of 47.3 dB at 1545.3 nm. Moreover, the influence of changing the structural parameters on the bistable behaviors is discussed in detail, showing that the structure can tolerate structural parametric deviation to some extent. The proposed bistable structure with ultra-compact size, low thresholds, high extinction ratio, and ultrafast response time could be of great applications for fabricating high-performance all-optical-communication devices. |
| first_indexed | 2024-03-11T09:32:10Z |
| format | Article |
| id | doaj.art-35ffc391a50a40839f0bf7354f925359 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T09:32:10Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-35ffc391a50a40839f0bf7354f9253592023-11-16T17:33:58ZengMDPI AGNanomaterials2079-49912023-01-0113338910.3390/nano13030389Low-Threshold and High-Extinction-Ratio Optical Bistability within a Graphene-Based Perfect AbsorberZhengzhuo Zhang0Qiaoge Sun1Yansong Fan2Zhihong Zhu3Jianfa Zhang4Xiaodong Yuan5Chucai Guo6College of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, ChinaA kind of graphene-based perfect absorber which can generate low-threshold and high-extinction-ratio optical bistability in the near-IR band is proposed and simulated with numerical methods. The interaction between input light and monolayer graphene in the absorber can be greatly enhanced due to the perfect absorption. The large nonlinear coefficient of graphene and the strong light-graphene interaction contribute to the nonlinear response of the structure, leading to relatively low switching thresholds of less than 2.5 MW/cm<sup>2</sup> for an absorber with a <i>Q</i> factor lower than 1000. Meanwhile, the extinction ratio of bistable states in the absorber reaches an ultrahigh value of 47.3 dB at 1545.3 nm. Moreover, the influence of changing the structural parameters on the bistable behaviors is discussed in detail, showing that the structure can tolerate structural parametric deviation to some extent. The proposed bistable structure with ultra-compact size, low thresholds, high extinction ratio, and ultrafast response time could be of great applications for fabricating high-performance all-optical-communication devices.https://www.mdpi.com/2079-4991/13/3/389grapheneperfect absorberoptical bistabilitynonlinear opticsnanostructure |
| spellingShingle | Zhengzhuo Zhang Qiaoge Sun Yansong Fan Zhihong Zhu Jianfa Zhang Xiaodong Yuan Chucai Guo Low-Threshold and High-Extinction-Ratio Optical Bistability within a Graphene-Based Perfect Absorber Nanomaterials graphene perfect absorber optical bistability nonlinear optics nanostructure |
| title | Low-Threshold and High-Extinction-Ratio Optical Bistability within a Graphene-Based Perfect Absorber |
| title_full | Low-Threshold and High-Extinction-Ratio Optical Bistability within a Graphene-Based Perfect Absorber |
| title_fullStr | Low-Threshold and High-Extinction-Ratio Optical Bistability within a Graphene-Based Perfect Absorber |
| title_full_unstemmed | Low-Threshold and High-Extinction-Ratio Optical Bistability within a Graphene-Based Perfect Absorber |
| title_short | Low-Threshold and High-Extinction-Ratio Optical Bistability within a Graphene-Based Perfect Absorber |
| title_sort | low threshold and high extinction ratio optical bistability within a graphene based perfect absorber |
| topic | graphene perfect absorber optical bistability nonlinear optics nanostructure |
| url | https://www.mdpi.com/2079-4991/13/3/389 |
| work_keys_str_mv | AT zhengzhuozhang lowthresholdandhighextinctionratioopticalbistabilitywithinagraphenebasedperfectabsorber AT qiaogesun lowthresholdandhighextinctionratioopticalbistabilitywithinagraphenebasedperfectabsorber AT yansongfan lowthresholdandhighextinctionratioopticalbistabilitywithinagraphenebasedperfectabsorber AT zhihongzhu lowthresholdandhighextinctionratioopticalbistabilitywithinagraphenebasedperfectabsorber AT jianfazhang lowthresholdandhighextinctionratioopticalbistabilitywithinagraphenebasedperfectabsorber AT xiaodongyuan lowthresholdandhighextinctionratioopticalbistabilitywithinagraphenebasedperfectabsorber AT chucaiguo lowthresholdandhighextinctionratioopticalbistabilitywithinagraphenebasedperfectabsorber |