Enhanced two-photon absorption and two-photon luminescence in monolayer MoS2 and WS2 by defect repairing | Zendy

Xuran Dai | Zendy; Xiaoyan Zhang | Zendy; I. M. Kislyakov | Zendy; Lei Wang | Zendy; Jiawei Huang | Zendy; Saifeng Zhang | Zendy; Ningning Dong | Zendy; Jun Wang | Zendy

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Enhanced two-photon absorption and two-photon luminescence in monolayer MoS₂ and WS₂ by defect repairing

Author(s) -

Xuran Dai,

Xiaoyan Zhang,

I. M. Kislyakov,

Lei Wang,

Jiawei Huang,

Saifeng Zhang,

Ningning Dong,

Jun Wang

Publication year - 2019

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.013744

Subject(s) - monolayer , luminescence , materials science , absorption (acoustics) , relaxation (psychology) , two photon absorption , photon , attenuation coefficient , optoelectronics , photochemistry , molecular physics , optics , nanotechnology , chemistry , laser , physics , composite material , psychology , social psychology

In this work, we investigated the nonlinear optical properties of monolayer MoS 2 and WS 2 modulated by defect engineering via chemical treatment. The results demonstrate that the two-photon luminescence (TPL) and two-photon absorption (TPA) coefficient were remarkably improved after the repair of sulfur vacancies for both monolayer MoS 2 and WS 2 . After the chemical treatment, the nonradiative relaxation path dominant in pristine monolayer MoS 2 is significantly alleviated, resulting in enhanced TPL. Our work affords an effective way to tailor the nonlinear absorption, luminescence and relaxation properties of sulfur-based two-dimensional metal dichalcogenides by defect engineering.

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