Terahertz emission from transient currents and coherent phonons in layered MoSe2 and WSe2-Reference-Cited by-同舟云学术

Terahertz emission from transient currents and coherent phonons in layered MoSe2 and WSe2

Published:2023-04-24 Issue:16 Volume:133 Page:
ISSN:0021-8979
Container-title:Journal of Applied Physics
language:en
Short-container-title:

Author:

Afalla Jessica¹^ORCID,Muldera Joselito²^ORCID,Takamizawa Semmi³,Fukuda Takumi³^ORCID,Ueno Keiji⁴^ORCID,Tani Masahiko²^ORCID,Hase Muneaki¹^ORCID

Affiliation:

1. Faculty of Pure and Applied Sciences, University of Tsukuba 1 , Tennodai 1-1-1, Tsukuba 305-8573, Japan

2. Research Center for Development of Far Infrared Region, University of Fukui 2 , Bunkyo 3-9-1, Fukui 910-8507, Japan

3. Graduate School of Pure and Applied Sciences, University of Tsukuba 3 , Tennodai 1-1-1, Tsukuba 305-8573, Japan

4. Department of Chemistry, Saitama University 4 , Shimookubo 255, Saitama 338-8570, Japan

Abstract

Terahertz (THz) time-domain emission spectroscopy was performed on layered 2H-MoSe 2 and 2H-WSe 2. The THz emission shows an initial cycle attributed to surge currents and is followed by oscillations attributed to coherent interlayer phonon modes. To obtain the frequencies of the interlayer vibrations, an analysis of the THz emission waveforms was performed, separating the two contributions to the total waveform. Results of the fitting show several vibrational modes in the range of 5.87–32.75 cm − 1 for the samples, attributed to infrared-active interlayer shear and breathing modes. This study demonstrates that THz emission spectroscopy provides a means of observing these low-frequency vibrational modes in layered materials.

Funder

Core Research for Evolutional Science and Technology

Cooperative Research Program of Research Center for Development of Far Infrared Region, University of Fukui

Publisher

AIP Publishing

Subject

General Physics and Astronomy

Link

https://pubs.aip.org/aip/jap/article-pdf/doi/10.1063/5.0146489/16966960/165103_1_5.0146489.pdf

Reference40 articles.

1. Electronics and optoelectronics of two-dimensional transition metal dichalcogenides;Nat. Nanotechnol.,2012

2. Emerging photoluminescence in monolayer MoS2;Nano Lett.,2010

3. Photoluminescence emission and raman response of monolayer MoS2, MoSe2, and WSe2;Opt. Express,2013

4. Fundamental absorption edges and indirect band gaps in W1−xMoxSe2 (o≤x≤1);J. Phys. C: Solid State Phys.,1984

5. Origin of indirect optical transitions in few-layer MoS2, WS2, and WSe2;Nano Lett.,2013

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