The optical properties of a weak probe field in a graphene ensemble under Raman excitation

We investigate the coherent manipulation of certain optical properties in graphene under Raman excitation by using a density-matrix approach. It is shown that the absorption and dispersion, the group velocity, and the transmission coefficient of the probe field can be efficiently controlled through...

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Bibliographic Details
Published in:Laser physics letters 2016-06, Vol.13 (6), p.65202
Main Authors: Raheli, Ali, Hamedi, H R, Sahrai, M
Format: Article
Language:English
Subjects:
graphene
group velocity
optical bistability
transmission coefficient
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Summary:We investigate the coherent manipulation of certain optical properties in graphene under Raman excitation by using a density-matrix approach. It is shown that the absorption and dispersion, the group velocity, and the transmission coefficient of the probe field can be efficiently controlled through proper adjustment of the intensity and frequency detuning of the control field. In addition, the optical bistability (OB) behavior is explored for the proposed system. It is found that the bistable threshold intensity and related hysteresis loop of OB can be controlled by the parameters of the system. The results obtained may be used in real experiments for the development of new types of nanoelectronic devices used for the realization of all-optical switching processes.
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-2011/13/6/065202