Photoexcited Graphene Metasurfaces: Significantly Enhanced and Tunable Magnetic Resonances

Fan, Yuancheng; Shen, Nian -Hai; Zhang, Fuli; Zhao, Qian; Wei, Zeyong; Zhang, Peng; Dong, Jiajia; Fu, Quanhong; Li, Hongqiang; Soukoulis, Costas M.

doi:10.1021/acsphotonics.8b00057

Title: Photoexcited Graphene Metasurfaces: Significantly Enhanced and Tunable Magnetic Resonances

Journal Article · 27 February 2018 · ACS Photonics

DOI: https://doi.org/10.1021/acsphotonics.8b00057 · OSTI ID:1438035

^[1];

^[2]; Zhang, Fuli ^[1]; Zhao, Qian ^[3]; Wei, Zeyong ^[4]; Zhang, Peng ^[2]; Dong, Jiajia ^[1]; Fu, Quanhong ^[1]; Li, Hongqiang ^[4]; Soukoulis, Costas M. ^[5]

Northwestern Polytechnical Univ., Xi'an (China)
Ames Lab. and Iowa State Univ., Ames, IA (United States)
Tsinghua Univ., Beijing (China)
The Institute of Dongguan-Tongji Univ., Guangdong (China); Tongji Univ., Shanghai (China)
Ames Lab. and Iowa State Univ., Ames, IA (United States); FORTH, Crete (Greece)

Artificially constructed metamaterials or metasurfaces with tailored resonant elements provide a revolutionary platform for controlling light at the subwavelength scale. Switchable or frequency-agile meta-devices are highly desirable in achieving more flexible functionalities and have been explored extensively by incorporating various materials, which respond to external stimuli. Graphene, a two-dimensional material showing extraordinary physical properties, has been found very promising for tunable meta-devices. However, the high intrinsic loss of graphene severely obstructs us from achieving high-quality resonance in various graphene metamaterials and metasurfaces, and the loss compensation can be considered as a straightforward strategy to take further advantages of enhanced light–graphene interactions. Here, we demonstrate that the photoexcited graphene, in which the quasi-Fermi energy of graphene changes corresponding to optical pumping, can boost the originally extremely weak magnetic resonance in a graphene split-ring metasurface, showing remarkable modulations in the transmission. In conclusion, our work pioneers the possibilities of optically pumped graphene metasurfaces for significant enhancement of resonances and feasible modulations.

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Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1438035

Report Number(s):: IS-J-9658

Journal Information:: ACS Photonics, Vol. 5, Issue 4; ISSN 2330-4022

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 113 works

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Plasmon-induced nonlinearity enhancement and homogenization of graphene metasurfaces You, Jian Wei; Panoiu, Nicolae C. arXiv https://doi.org/10.48550/arxiv.1904.11297	text	January 2019
Experimental Demonstration of Ultrafast THz Modulation in a Graphene-Based Thin Film Absorber through Negative Photoinduced Conductivity Tasolamprou, Anna C.; Koulouklidis, Anastasios D.; Daskalaki, Christina ACS Photonics, Vol. 6, Issue 3 https://doi.org/10.1021/acsphotonics.8b01595	journal	February 2019