An on-Si directional second harmonic generation amplifier for MoS2/WS2 heterostructure

Jiaxing Du; Jianwei Shi; Chun Li; Qiuyu Shang; Xinfeng Liu; Yuan Huang; Qing Zhang

doi:10.1007/s12274-022-4898-x

An on-Si directional second harmonic generation amplifier for MoS₂/WS₂ heterostructure

Jiaxing Du, Jianwei Shi, Chun Li, Qiuyu Shang, Xinfeng Liu, Yuan Huang^*, Qing Zhang^*

^*Corresponding author for this work

Advanced Research Institute of Multidisciplinary Science

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Transition metal dichalcogenides (TMD) heterostructure is widely applied for second harmonic generation (SHG) and holds great promises for laser source, nonlinear switch, and optical logic gate. However, for atomically thin TMD heterostructures, low SHG conversion efficiency would occur due to reduction of light—matter interaction length and lack of phase matching. Herein, we demonstrated a facile directional SHG amplifier formed by MoS₂/WS₂ monolayer heterostructures suspended on a holey SiO₂/Si substrate. The SHG enhancement factor reaches more than two orders of magnitude in a wide spectral range from 355 to 470 nm, and the radiation angle is reduced from 38° to 19° indicating higher coherence and better emission directionality. The giant SHG enhancement and directional emission are attributed to the great excitation and emission field concentration induced by a self-formed vertical Fabry—Pérot microcavity. Our discovery gives helpful insights for the development of two-dimensional (2D) nonlinear optical devices. [Figure not available: see fulltext.].

Original language	English
Pages (from-to)	4061-4066
Number of pages	6
Journal	Nano Research
Volume	16
Issue number	3
DOIs	https://doi.org/10.1007/s12274-022-4898-x
Publication status	Published - Mar 2023

Keywords

field enhancement
heterostructure
optical microcavity
second harmonic generation
transition metal dichalcogenides
two-dimensional (2D) materials

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10.1007/s12274-022-4898-x

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title = "An on-Si directional second harmonic generation amplifier for MoS2/WS2 heterostructure",

abstract = "Transition metal dichalcogenides (TMD) heterostructure is widely applied for second harmonic generation (SHG) and holds great promises for laser source, nonlinear switch, and optical logic gate. However, for atomically thin TMD heterostructures, low SHG conversion efficiency would occur due to reduction of light—matter interaction length and lack of phase matching. Herein, we demonstrated a facile directional SHG amplifier formed by MoS2/WS2 monolayer heterostructures suspended on a holey SiO2/Si substrate. The SHG enhancement factor reaches more than two orders of magnitude in a wide spectral range from 355 to 470 nm, and the radiation angle is reduced from 38° to 19° indicating higher coherence and better emission directionality. The giant SHG enhancement and directional emission are attributed to the great excitation and emission field concentration induced by a self-formed vertical Fabry—P{\'e}rot microcavity. Our discovery gives helpful insights for the development of two-dimensional (2D) nonlinear optical devices. [Figure not available: see fulltext.].",

keywords = "field enhancement, heterostructure, optical microcavity, second harmonic generation, transition metal dichalcogenides, two-dimensional (2D) materials",

author = "Jiaxing Du and Jianwei Shi and Chun Li and Qiuyu Shang and Xinfeng Liu and Yuan Huang and Qing Zhang",

note = "Publisher Copyright: {\textcopyright} 2022, Tsinghua University Press.",

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doi = "10.1007/s12274-022-4898-x",

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T1 - An on-Si directional second harmonic generation amplifier for MoS2/WS2 heterostructure

AU - Du, Jiaxing

AU - Shi, Jianwei

AU - Li, Chun

AU - Shang, Qiuyu

AU - Liu, Xinfeng

AU - Huang, Yuan

AU - Zhang, Qing

PY - 2023/3

Y1 - 2023/3

N2 - Transition metal dichalcogenides (TMD) heterostructure is widely applied for second harmonic generation (SHG) and holds great promises for laser source, nonlinear switch, and optical logic gate. However, for atomically thin TMD heterostructures, low SHG conversion efficiency would occur due to reduction of light—matter interaction length and lack of phase matching. Herein, we demonstrated a facile directional SHG amplifier formed by MoS2/WS2 monolayer heterostructures suspended on a holey SiO2/Si substrate. The SHG enhancement factor reaches more than two orders of magnitude in a wide spectral range from 355 to 470 nm, and the radiation angle is reduced from 38° to 19° indicating higher coherence and better emission directionality. The giant SHG enhancement and directional emission are attributed to the great excitation and emission field concentration induced by a self-formed vertical Fabry—Pérot microcavity. Our discovery gives helpful insights for the development of two-dimensional (2D) nonlinear optical devices. [Figure not available: see fulltext.].

AB - Transition metal dichalcogenides (TMD) heterostructure is widely applied for second harmonic generation (SHG) and holds great promises for laser source, nonlinear switch, and optical logic gate. However, for atomically thin TMD heterostructures, low SHG conversion efficiency would occur due to reduction of light—matter interaction length and lack of phase matching. Herein, we demonstrated a facile directional SHG amplifier formed by MoS2/WS2 monolayer heterostructures suspended on a holey SiO2/Si substrate. The SHG enhancement factor reaches more than two orders of magnitude in a wide spectral range from 355 to 470 nm, and the radiation angle is reduced from 38° to 19° indicating higher coherence and better emission directionality. The giant SHG enhancement and directional emission are attributed to the great excitation and emission field concentration induced by a self-formed vertical Fabry—Pérot microcavity. Our discovery gives helpful insights for the development of two-dimensional (2D) nonlinear optical devices. [Figure not available: see fulltext.].

KW - field enhancement

KW - heterostructure

KW - optical microcavity

KW - second harmonic generation

KW - transition metal dichalcogenides

KW - two-dimensional (2D) materials

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DO - 10.1007/s12274-022-4898-x

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SN - 1998-0124

VL - 16

SP - 4061

EP - 4066

JO - Nano Research

JF - Nano Research

IS - 3

ER -

An on-Si directional second harmonic generation amplifier for MoS₂/WS₂ heterostructure

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Keywords

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