Phase-change periodic surface structures for engineering of excitonic photoluminescence in WS2 monolayers

P. I. Trofimov,T. Ivanova,P. I. Lazarenko, M. Fedyanina,I. S. Sinev

ST PETERSBURG POLYTECHNIC UNIVERSITY JOURNAL-PHYSICS AND MATHEMATICS（2022）

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摘要

Due to their two-dimensional nature, transition metal dichalcogenide monolayers exhibit extremely strong sensitivity of their excitonic response to the permittivity of the sur-rounding medium. Here, we show that the intensity and wavelength of their excitonic photolu-minescence can be spatially modulated by periodic structures induced by laser pulses in phase change material films.

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关键词

phase change materials,Ge2Sb2Te5,transition metal dichalcogenides,WS2,laser induced periodic surface structures,phase change gratings,exciton screening

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