Open AccessHighly linear polarized photoluminescence from a rippled WSe2 monolayer
Author(s) -
Bilin Li,
Zhongqi Ren,
Ni Zhong,
Wei Xie
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.012436
Subject(s) - photoluminescence , monolayer , materials science , polarization (electrochemistry) , optics , optoelectronics , dipole , excited state , exciton , nanostructure , linear polarization , molecular physics , condensed matter physics , nanotechnology , laser , physics , atomic physics , chemistry , quantum mechanics
Shaping the topography of an atomically thin film is a novel way to engineer the optoelectronic performances of an ideal surface. In this letter, we study the photoluminescence characters of a WSe 2 monolayer of spiky nanostructures and rippled morphology, which are induced during the transfer process of monolayer to a Bi 2 Se 3 flake. Photo-excited excitons are trapped by these nanostructures, resulting in energy redshifts up to 150 meV at low temperature. We study the polarization degrees of the corresponding radiation signals and the polarization directions. Interestingly, the appearance features of monolayer correlates with the optical polarization property of the photoluminescence. Our work attracts insight to the relevance between surface topography and the dipole polarization on an ideal surface.