Large tunable optical absorption of CVD graphene under total internal reflection by strain engineering

We have developed a method to tune polarization-dependent optical absorption of large-scale chemical vapor deposition (CVD) graphene under total internal reflection (TIR) by strain engineering. Through control of the strain direction, the optical absorption of graphene for transverse magnetic or tra...

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Bibliographic Details
Published in:Nanotechnology 2014-11, Vol.25 (45), p.455707-455707
Main Authors: Dong, Bin, Wang, Peng, Liu, Zhi-Bo, Chen, Xu-Dong, Jiang, Wen-Shuai, Xin, Wei, Xing, Fei, Tian, Jian-Guo
Format: Article
Language:English
Subjects:
Chemical vapor deposition
Chemical vapor deposition (including plasma-enhanced cvd, mocvd, etc.)
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Devices
Electromagnetic waves
Exact sciences and technology
Fullerenes and related materials
Fullerenes and related materials
diamonds, graphite
Graphene
Materials science
Methods of deposition of films and coatings
film growth and epitaxy
Modulation
Nanotechnology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Physics
Reflection
Specific materials
Strain
total internal reflection
tunable optical absorption
Visible and ultraviolet spectra
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Summary:We have developed a method to tune polarization-dependent optical absorption of large-scale chemical vapor deposition (CVD) graphene under total internal reflection (TIR) by strain engineering. Through control of the strain direction, the optical absorption of graphene for transverse magnetic or transverse electric waves can be separately tuned. Strain-induced modulation of the optical absorption has been theoretically expected when light is normally incident through graphene. Under TIR, however, we experimentally observed a significant increase in the strain-induced tunability of optical absorption for CVD graphene, with the modulation efficiency of optical absorption in monolayer graphene increasing by a factor of three times that for normal incidence. We conclude that the strain sensitivity of optical absorption of graphene under TIR offers significant potential for application in many areas such as ultra-thin optical devices and strain sensors.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/25/45/455707