@inproceedings{6d9c0c014df24b81ba1df73564a8075d,
title = "Biaxial strain in atomically thin transition metal dichalcogenides",
abstract = "Strain engineering in single-layer semiconducting transition metal dichalcogenides aims to tune their bandgap energy and to modify their optoelectronic properties by the application of external strain. In this paper we study transition metal dichalcogenides monolayers deposited on polymeric substrates under the application of biaxial strain, both tensile and compressive. We can control the amount of biaxial strain applied by letting the substrate thermally expand or compress by changing the substrate temperature. After modelling the substrate-dependent strain transfer process with a finite elements simulation, we performed micro-differential spectroscopy of four transition metal dichalcogenides monolayers (MoS2, MoSe2, WS2, WSe2) under the application of biaxial strain and measured their optical properties. For tensile strain we observe a redshift of the bandgap that reaches a value as large as 94 meV/% in the case of single-layer WS2 deposited on polypropylene. The observed bandgap shifts as a function of substrate extension/ compression follow the order WS2 < WSe2 < MoS2 < MoSe2.",
keywords = "differential reflectance, monolayer, optical properties, strain engineering, transition metal dichalcogenides",
author = "Riccardo Frisenda and Robert Schmidt and {Michaelis De Vasconcellos}, Steffen and Rudolf Bratschitsch and {Perez De Lara}, David and Andres Castellanos-Gomez",
note = "Publisher Copyright: {\textcopyright} 2017 SPIE. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.; null ; Conference date: 09-08-2017 Through 10-08-2017",
year = "2017",
doi = "10.1117/12.2274756",
language = "英语",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Manijeh Razeghi and Oleg Mitrofanov and Vizcaino, {Jose Luis Pau} and Tan, {Chee Hing}",
booktitle = "Optical Sensing, Imaging, and Photon Counting",
address = "United States",
}