Acta Optica Sinica, Volume. 40, Issue 6, 0624001(2020)
Third-Order Nonlinearity and Optical Bistability Regulation Characteristic of Graphene
In this study, the third-order nonlinearity and optical bistability effect of mono-layer graphene was investigated. Using theoretical analysis and numerical simulation, the threshold value of the optical bistability of mono-layer third-order nonlinearity graphene can be tuned by changing its Fermi energy, relaxation time, two-photon absorption coefficient, and temperature. We demonstrate that the larger Fermi energy level,the higher temperature and the larger threshold value of the optical bistability. Further, a higher two-photon absorption coefficient corresponds to a higher low threshold of the bistability. Moreover, the relaxation time and two-photon absorption coefficient can significantly alter the light transmissivity of the graphene structure, although the light transmissivity is insensitive to the temperature of the graphene material. Results offer a theoretical basis for designing nanophotonic devices with micro-nano structure such as optical switches and optical sensors.
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Qiawu Lin, Renlong Zhou, Sa Yang, Dan Liu, Shuang Li, Yongming Zhao. Third-Order Nonlinearity and Optical Bistability Regulation Characteristic of Graphene[J]. Acta Optica Sinica, 2020, 40(6): 0624001
Category: Optics at Surfaces
Received: Sep. 6, 2019
Accepted: Dec. 2, 2019
Published Online: Mar. 6, 2020
The Author Email: Lin Qiawu (linqiawu@163.com), Zhou Renlong (rlzhoupc@sina.com)