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Polarization-insensitive Terahertz Graphene-based Optical Switches.

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Title: Polarization-insensitive Terahertz Graphene-based Optical Switches.
Authors: Zhu, Jun1,2 (AUTHOR) zhujun1985@gxnu.edu.cn, Xiong, Jiayuan2 (AUTHOR)
Source: Plasmonics. May2025, Vol. 20 Issue 5, p2635-2644. 10p.
Subjects: Coupled mode theory (Wave-motion), Optical switches, Optical switching, Optical modulation, Insertion loss (Telecommunication)
Abstract: We designed a single-layer patterned graphene metasurface composed of four L-shaped graphene strips, four rectangular graphene strips, and meter-shaped graphene block. Metasurface creates dual plasmon-induced transparency (PIT) through the interaction between light and dark modes. The transmission characteristics of the structure are analyzed using the coupled mode theory and the finite element method, and the structure realizes the function of the dual-frequency optical switch. At frequencies of 3.72 THz and 6.24 THz, the optical switch modulation amplitudes are 98.04% and 95.37%, respectively, and the corresponding insertion losses are 0.16 dB and 0.08 dB respectively. In addition, the proposed structure is insensitive to changes in the polarization angle of the incident light. Under the incidence of x-polarized light and y-polarized light, the PIT effect of the two structures is consistent. This research will present a new idea for the design of terahertz multi-frequency optical switches. The optical switch has great potential for various applications such as terahertz imaging, sensors, photodetectors, and modulators. [ABSTRACT FROM AUTHOR]
Copyright of Plasmonics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Polarization-insensitive Terahertz Graphene-based Optical Switches.
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  Data: <searchLink fieldCode="JN" term="%22Plasmonics%22">Plasmonics</searchLink>. May2025, Vol. 20 Issue 5, p2635-2644. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Coupled+mode+theory+%28Wave-motion%29%22">Coupled mode theory (Wave-motion)</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+switches%22">Optical switches</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+switching%22">Optical switching</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+modulation%22">Optical modulation</searchLink><br /><searchLink fieldCode="DE" term="%22Insertion+loss+%28Telecommunication%29%22">Insertion loss (Telecommunication)</searchLink>
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  Data: We designed a single-layer patterned graphene metasurface composed of four L-shaped graphene strips, four rectangular graphene strips, and meter-shaped graphene block. Metasurface creates dual plasmon-induced transparency (PIT) through the interaction between light and dark modes. The transmission characteristics of the structure are analyzed using the coupled mode theory and the finite element method, and the structure realizes the function of the dual-frequency optical switch. At frequencies of 3.72 THz and 6.24 THz, the optical switch modulation amplitudes are 98.04% and 95.37%, respectively, and the corresponding insertion losses are 0.16 dB and 0.08 dB respectively. In addition, the proposed structure is insensitive to changes in the polarization angle of the incident light. Under the incidence of x-polarized light and y-polarized light, the PIT effect of the two structures is consistent. This research will present a new idea for the design of terahertz multi-frequency optical switches. The optical switch has great potential for various applications such as terahertz imaging, sensors, photodetectors, and modulators. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Plasmonics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11468-024-02490-3
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      – Code: eng
        Text: English
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      – SubjectFull: Optical modulation
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              Text: May2025
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