基于石墨烯的光学控制窄带太赫兹开关

GREBENCHUKOVAlexander N; ZAITSEVAnton D; KHODZITSKYMikhail K

doi:10.3788/CO.20181102.0166

Volume 11 Issue 2

Apr. 2018

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Chinese Optics > 2018 > 11(2): 166-173.

GREBENCHUKOV Alexander N, ZAITSEV Anton D, KHODZITSKY Mikhail K. Optically controlled narrowband terahertz switcher based on graphene[J]. Chinese Optics, 2018, 11(2): 166-173. doi: 10.3788/CO.20181102.0166

Citation:

GREBENCHUKOV Alexander N, ZAITSEV Anton D, KHODZITSKY Mikhail K. Optically controlled narrowband terahertz switcher based on graphene[J]. Chinese Optics, 2018, 11(2): 166-173. doi: 10.3788/CO.20181102.0166

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Optically controlled narrowband terahertz switcher based on graphene

doi: 10.3788/CO.20181102.0166

ITMO University, Saint-Petersburg 197101, Russia

Funds:

Government of Russian Federation grant 074-U01

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Author Bio:
GREBENCHUKOV Alexander(1990—), PhD student, Department of Photonics and Optical Information Technology, ITMO University, Russia. His research interests focus on graphene-based tunable terahertz metamaterials and designing structures for superresolution. E-mail:grebenchukov_a@mail.ru

ZAITSEV Anton(1995—), Undergraduate student, Department of Photonics and Optical Information Technology, ITMO University, Russia. His research interests focus on graphene-based tunable terahertz metamaterials. E-mail:anleza@ya.ru

KHODZITSKY Mikhail(1984—), Chief of Terahertz Biomedicine Laboratory, Associate professor, Department of Photonics and Optical Information Technology, ITMO University, Russia. His research interests focus on terahertz photonics, metamaterials, biophotonics and terahertz spectroscopy. E-mail:khodzitskiy@yandex.ru
Corresponding author: KHODZITSKY Mikhail K, E-mail:khodzitskiy@yandex.ru
Received Date: 14 Dec 2017
Rev Recd Date: 27 Jan 2018
Publish Date: 01 Apr 2018

Abstract

Abstract

This paper proposes an optically controlled terahertz switcher based on cross-shaped metal resonators metasurface covered by monolayer graphene. The spectral characteristics of proposed composite structure were calculated using the surface conductivity model of graphene and the finite element method. The modeling demonstrated the appearance of a narrowband resonant dip in the transmission spectrum with a modulation depth of 36.8% and a Q-factor of 250 after the optical pump intensity achieving to 0.2 W/mm². In addition, the modulation depth of such a dip can be slightly tuned by varying value of the pump intensity. Thus, the design of the optically tunable terahertz switcher may contribute to the development of functional components for terahertz communication applications.
- terahertz,
- graphene,
- optical switching devices

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References(34)

References

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