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Self‐Erasable and Rewritable Optoexcitonic Platform for Antitamper Hardware
Author(s) -
Cheng CheHsuan,
Yang Da Seul,
Kim Jinsang,
Deotare Parag B.
Publication year - 2020
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.202001287
Subject(s) - materials science , tungsten diselenide , azobenzene , diselenide , monolayer , optoelectronics , photoluminescence , nanoscopic scale , wavelength , nanotechnology , visible spectrum , optics , transition metal , composite material , biochemistry , chemistry , physics , selenium , metallurgy , catalysis , polymer
In this work nanoscale strain engineering is utilized to create a self‐erasable and rewritable platform for antitamper hardware. The reversible structural change between trans and cis isomers in azobenzene (A3) molecules is utilized to strain the overlying tungsten diselenide (WSe 2 ) monolayer, thereby affecting its optical bandgap. Using such hybrid material combination, large (>1%) local effective strain is generated that results in dramatic shift (>11 nm) in photoluminescence wavelength. The strain can be rapidly relaxed under exposure to visible light or can be retained up to seven days under dark condition. Thus, by utilizing hyperspectral imaging, a self‐erasable and rewritable optoexcitonic platform is demonstrated that responds to environmental changes (light/temperature) to detect tampering of hardware system. In addition, the results open avenues for varied applications in information storage, time sensitive self‐destructive memories to light detection.