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Graphene-loaded metal wire grating for deep and broadband THz modulation in total internal reflection geometry
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Sun, Yiwen, Degl'Innocenti, Riccardo, Ritchie, David A., Beere, Harvey E., Xiao, Long, Ruggiero, Michael, Zeitler, J. Axel, Stantchev, Rayko I., Chen, Danni, Peng, Zhengchun, Pickwell-MacPherson, Emma and Liu, Xudong (2018) Graphene-loaded metal wire grating for deep and broadband THz modulation in total internal reflection geometry. Photonics Research, 6 (12). pp. 1151-1157. doi:10.1364/PRJ.6.001151
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Official URL: https://doi.org/10.1364/PRJ.6.001151
Abstract
We employed a metallic wire grating loaded with graphene and operating in total internal reflection (TIR) geometry to realise deep and broadband THz modulation. The non-resonant field enhancement effect of the evanescent wave in the TIR geometry and in the subwavelength wire grating was combined to demonstrate a ~77% modulation depth (MD) in the frequency range of 0.2-1.4 THz. This MD, achieved electrically with SiO2/Si gated graphene device, was 4.5 times higher than the device without metal grating in transmission geometry. By optimizing the parameters of metallic wire grating, the required sheet conductivity of graphene for deep modulation was lowered to 0.87 mS. This work has potential applications in THz communication and real-time THz imaging.
| Item Type: | Journal Article | |||||||||||||||||||||||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | |||||||||||||||||||||||||||
| Divisions: | Faculty of Science > Physics | |||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Terahertz technology, Graphene -- Industrial applications | |||||||||||||||||||||||||||
| Journal or Publication Title: | Photonics Research | |||||||||||||||||||||||||||
| Publisher: | Optical Society of America | |||||||||||||||||||||||||||
| ISSN: | 2327-9125 | |||||||||||||||||||||||||||
| Official Date: | 21 November 2018 | |||||||||||||||||||||||||||
| Dates: |
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| Date of first compliant deposit: | 7 November 2018 | |||||||||||||||||||||||||||
| Volume: | 6 | |||||||||||||||||||||||||||
| Number: | 12 | |||||||||||||||||||||||||||
| Page Range: | pp. 1151-1157 | |||||||||||||||||||||||||||
| DOI: | 10.1364/PRJ.6.001151 | |||||||||||||||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||||||||
| Publisher Statement: | © 2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved. | |||||||||||||||||||||||||||
| Access rights to Published version: | Open Access | |||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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