Dynamic tuning of WSe2 exciton emission via laser annealing

Yi Yu; John J. Eng; Kunze Lu; Manlin Luo; Bongkwon Son; Pratul Venkatesh; Wen Wei Lee; Yong Hao Tham; Weibo Gao; Donguk Nam

doi:10.1117/12.2649766

12 April 2023 Dynamic tuning of WSe₂ exciton emission via laser annealing

Yi Yu, John J. Eng, Kunze Lu, Manlin Luo, Bongkwon Son, Pratul Venkatesh, Wen Wei Lee, Yong Hao Tham, Weibo Gao, Donguk Nam

Author Affiliations +

Proceedings Volume 12423, 2D Photonic Materials and Devices VI; 1242303 (2023) https://doi.org/10.1117/12.2649766
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

We present a strain engineering platform that allows the dynamic tuning of the emission wavelength of a monolayer WSe₂. A large and localized strain was induced in monolayer 2D materials by patterning a photoresist layer with internal stress into two elliptical shapes with a finite gap in between, which is referred to as a dimer in this work. By applying laser annealing on the dimer stressor while monitoring the exciton emission, we demonstrate the capability to dynamically tune the emission wavelength of the bright exciton in the monolayer WSe₂.

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Yi Yu, John J. Eng, Kunze Lu, Manlin Luo, Bongkwon Son, Pratul Venkatesh, Wen Wei Lee, Yong Hao Tham, Weibo Gao, and Donguk Nam "Dynamic tuning of WSe₂ exciton emission via laser annealing", Proc. SPIE 12423, 2D Photonic Materials and Devices VI, 1242303 (12 April 2023); https://doi.org/10.1117/12.2649766

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