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

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1];  [3];  [4];  [2];  [1];  [1];  [4];  [5]
  1. Northwestern Polytechnical Univ., Xi'an (China)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  3. Tsinghua Univ., Beijing (China)
  4. The Institute of Dongguan-Tongji Univ., Guangdong (China); Tongji Univ., Shanghai (China)
  5. Ames Lab. and Iowa State Univ., Ames, IA (United States); FORTH, Crete (Greece)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1438035
Report Number(s):
IS-J-9658
Journal ID: ISSN 2330-4022
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Photonics
Additional Journal Information:
Journal Volume: 5; Journal Issue: 4; Journal ID: ISSN 2330-4022
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; gain; graphene plasmonics; loss compensation; magnetic resonance; surface conductivity; terahertz metamaterials

Citation Formats

Fan, Yuancheng, Shen, Nian -Hai, Zhang, Fuli, Zhao, Qian, Wei, Zeyong, Zhang, Peng, Dong, Jiajia, Fu, Quanhong, Li, Hongqiang, and Soukoulis, Costas M. Photoexcited Graphene Metasurfaces: Significantly Enhanced and Tunable Magnetic Resonances. United States: N. p., 2018. Web. doi:10.1021/acsphotonics.8b00057.
Fan, Yuancheng, Shen, Nian -Hai, Zhang, Fuli, Zhao, Qian, Wei, Zeyong, Zhang, Peng, Dong, Jiajia, Fu, Quanhong, Li, Hongqiang, & Soukoulis, Costas M. Photoexcited Graphene Metasurfaces: Significantly Enhanced and Tunable Magnetic Resonances. United States. doi:10.1021/acsphotonics.8b00057.
Fan, Yuancheng, Shen, Nian -Hai, Zhang, Fuli, Zhao, Qian, Wei, Zeyong, Zhang, Peng, Dong, Jiajia, Fu, Quanhong, Li, Hongqiang, and Soukoulis, Costas M. Tue . "Photoexcited Graphene Metasurfaces: Significantly Enhanced and Tunable Magnetic Resonances". United States. doi:10.1021/acsphotonics.8b00057. https://www.osti.gov/servlets/purl/1438035.
@article{osti_1438035,
title = {Photoexcited Graphene Metasurfaces: Significantly Enhanced and Tunable Magnetic Resonances},
author = {Fan, Yuancheng and Shen, Nian -Hai and Zhang, Fuli and Zhao, Qian and Wei, Zeyong and Zhang, Peng and Dong, Jiajia and Fu, Quanhong and Li, Hongqiang and Soukoulis, Costas M.},
abstractNote = {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.},
doi = {10.1021/acsphotonics.8b00057},
journal = {ACS Photonics},
issn = {2330-4022},
number = 4,
volume = 5,
place = {United States},
year = {2018},
month = {2}
}

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Cited by: 15 works
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