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Polarization Control of Deterministic Single-Photon Emitters in Monolayer WSe2

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Title
Polarization Control of Deterministic Single-Photon Emitters in Monolayer WSe2
Author(s)
So, Jae-Pil; Jeong, Kwang-Yong; Lee, Jung Min; Kim, Kyoung-Ho; Lee, Soon-Jae; Huh, Woong; Kim, Ha-Reem; Choi, Jae-Hyuck; Kim, Jin Myung; Kim, Yoon Seok; Lee, Chul-Ho; Nam, SungWoo; Hong-Gyu Park
Publication Date
2021-02
Journal
NANO LETTERS, v.21, no.3, pp.1546 - 1554
Publisher
AMER CHEMICAL SOC
Abstract
Single-photon emitters, the basic building blocks of quantum communication and information, have been developed using atomically thin transition metal dichalcogenides (TMDCs). Although the bandgap of TMDCs was spatially engineered in artificially created defects for single-photon emitters, it remains a challenge to precisely align the emitter's dipole moment to optical cavities for the Purcell enhancement. Here, we demonstrate position- and polarization-controlled single-photon emitters in monolayer WSe2. A tensile strain of similar to 0.2% was applied to monolayer WSe2 by placing it onto a dielectric rod structure with a nanosized gap. Excitons were localized in the nanogap sites, resulting in the generation of linearly polarized single-photon emission with a g((2)) of similar to 0.1 at 4 K. Additionally, we measured the abrupt change in polarization of single photons with respect to the nanogap size. Our robust spatial and polarization control of emission provides an efficient way to demonstrate deterministic and scalable single-photon sources by integrating with nanocavities.
URI
https://pr.ibs.re.kr/handle/8788114/9744
DOI
10.1021/acs.nanolett.1c00078
ISSN
1530-6984
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > 1. Journal Papers (저널논문)
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