Low-Threshold Optical Bistability in the Graphene-Oxide Integrated Asymmetric Nanocavity at Visible Light Frequencies

Nanomaterials

Zeqiang Wang¹  Min Gu¹  Qiming Zhang¹  Xiaoguang Ma¹  Boyuan Cai¹  Zhengfen Wan¹  Yunyue Zhang¹ 

[1] Institute of Photonic Chips, University of Shanghai for Science and Technology, Shanghai 200093, China;

关键词: graphene oxide;    nanocavity;    optical bistability;   

DOI  :  10.3390/nano12071117

来源: DOAJ

【 摘 要 】

Here, we propose an optical bistable device structure with a few layers of graphene oxide integrated in the metal-dielectric-metal based asymmetric nanocavity. Through the light confinement in the nanocavity, the third order nonlinear absorption of graphene oxide can be significantly enhanced, which experimentally delivers low-threshold optical bistability at the visible wavelength of 532 nm with only 267 KW/cm² intensity. In addition, the switching threshold can be further reduced via increasing the graphene oxide thickness, hence paving a new way for achieving tunable optical bistable devices at visible light frequencies.

【 授权许可】

Unknown