Open AccessNanocavity absorption enhancement for two-dimensional material monolayer systems
Author(s) -
Haomin Song,
Suhua Jiang,
Dengxin Ji,
Xie Zeng,
Nan Zhang,
Kai Li,
Chu Wang,
Yun Xu,
Qiaoqiang Gan
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.007120
Subject(s) - monolayer , materials science , graphene , absorption (acoustics) , planar , optoelectronics , optics , refractive index , layer (electronics) , thin film , reflector (photography) , nanotechnology , physics , computer science , composite material , light source , computer graphics (images)
Here we propose a strategy to enhance the light-matter interaction of two-dimensional (2D) material monolayers based on strong interference effect in planar nanocavities, and overcome the limitation between optical absorption and the atomically-thin thickness of 2D materials. By exploring the role of spacer layers with different thicknesses and refractive indices, we demonstrate that a nanocavity with an air spacer layer placed between a graphene monolayer and an aluminum reflector layer will enhance the exclusive absorption in the graphene monolayer effectively, which is particularly useful for the development of atomically-thin energy harvesting/conversion devices.