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