@inproceedings{15d5c0957bbf4456921de345b36a7bc2,
title = "Strain engineering photonic properties in monolayer semiconductors through mechanically-reconfigurable wrinkling",
abstract = "Inhomogeneous and three-dimensional strain engineering in two dimensional materials opens up new avenues to straintronic devices for control strain sensitive photonic properties. Here we present a method to tune strain by wrinkling monolayer WSe2 attached to a 15 nm thick ALD support layer and compressing the heterostructure on a soft substrate. The ALD film stiffens the 2D material, enabling optically resolvable micron scale wrinkling rather than nanometer scale crumpling and folding. Using photoluminescence spectroscopy, we show the wrinkling introduces periodic modulation of the bandgap by 47 meV, corresponding with strain modulation from +0.67% tensile strain at the wrinkle crest to -0.31% compressive strain at the trough. Moreover, we show that cycling the substrate strain mechanically reconfigures the magnitude and direction of wrinkling and resulting band tuning. These results pave the way towards stretchable multifuctional devices based on strained 2D materials.",
keywords = "2D materials, Nanomechanics, Strain Engineering",
author = "Hossain, {M. A.} and Yue Zhang and {Van Der Zande}, {Arend M.}",
note = "Publisher Copyright: {\textcopyright} 2020 SPIE.; Physical Chemistry of Semiconductor Materials and Interfaces XIX 2020 ; Conference date: 24-08-2020 Through 04-09-2020",
year = "2020",
doi = "10.1117/12.2567539",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Christian Nielsen and Daniel Congreve and Musser, {Andrew J.}",
booktitle = "Physical Chemistry of Semiconductor Materials and Interfaces XIX",
}