In-plane optical anisotropy of layered gallium telluride
Abstract
Layered gallium telluride (GaTe) has attracted much attention recently, due to its extremely high photoresponsivity, short response time, and promising thermoelectric performance. Different from most commonly studied two-dimensional (2D) materials, GaTe has in-plane anisotropy and a low symmetry with the C2h3 space group. Investigating the in-plane optical anisotropy, including the electron–photon and electron–phonon interactions of GaTe is essential in realizing its applications in optoelectronics and thermoelectrics. In this work, the anisotropic light-matter interactions in the low-symmetry material GaTe are studied using anisotropic optical extinction and Raman spectroscopies as probes. Our polarized optical extinction spectroscopy reveals the weak anisotropy in optical extinction spectra for visible light of multilayer GaTe. Polarized Raman spectroscopy proves to be sensitive to the crystalline orientation of GaTe, and shows the intricate dependences of Raman anisotropy on flake thickness, photon and phonon energies. Such intricate dependences can be explained by theoretical analyses employing first-principles calculations and group theory. Furthermore, these studies are a crucial step toward the applications of GaTe especially in optoelectronics and thermoelectrics, and provide a general methodology for the study of the anisotropy of light-matter interactions in 2D layered materials with in-plane anisotropy.
- Authors:
-
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Tohoku Univ., Sendai (Japan)
- Liaoning Shihua Univ., Fushun (China)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Chinese Academy of Sciences, Shenyang (China); Tohoku Univ., Sendai (Japan)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1338530
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Nano
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 9; Journal ID: ISSN 1936-0851
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; electron−photon interaction; group theory; light-matter interaction; optical transition selection rules; polarization-dependent optical extinction; polarization-dependent Raman spectroscopy
Citation Formats
Huang, Shengxi, Tatsumi, Yuki, Ling, Xi, Guo, Huaihong, Wang, Ziqiang, Watson, Garrett, Puretzky, Alexander A., Geohegan, David B., Kong, Jing, Li, Ju, Yang, Teng, Saito, Riichiro, and Dresselhaus, Mildred S. In-plane optical anisotropy of layered gallium telluride. United States: N. p., 2016.
Web. doi:10.1021/acsnano.6b05002.
Huang, Shengxi, Tatsumi, Yuki, Ling, Xi, Guo, Huaihong, Wang, Ziqiang, Watson, Garrett, Puretzky, Alexander A., Geohegan, David B., Kong, Jing, Li, Ju, Yang, Teng, Saito, Riichiro, & Dresselhaus, Mildred S. In-plane optical anisotropy of layered gallium telluride. United States. https://doi.org/10.1021/acsnano.6b05002
Huang, Shengxi, Tatsumi, Yuki, Ling, Xi, Guo, Huaihong, Wang, Ziqiang, Watson, Garrett, Puretzky, Alexander A., Geohegan, David B., Kong, Jing, Li, Ju, Yang, Teng, Saito, Riichiro, and Dresselhaus, Mildred S. Tue .
"In-plane optical anisotropy of layered gallium telluride". United States. https://doi.org/10.1021/acsnano.6b05002. https://www.osti.gov/servlets/purl/1338530.
@article{osti_1338530,
title = {In-plane optical anisotropy of layered gallium telluride},
author = {Huang, Shengxi and Tatsumi, Yuki and Ling, Xi and Guo, Huaihong and Wang, Ziqiang and Watson, Garrett and Puretzky, Alexander A. and Geohegan, David B. and Kong, Jing and Li, Ju and Yang, Teng and Saito, Riichiro and Dresselhaus, Mildred S.},
abstractNote = {Layered gallium telluride (GaTe) has attracted much attention recently, due to its extremely high photoresponsivity, short response time, and promising thermoelectric performance. Different from most commonly studied two-dimensional (2D) materials, GaTe has in-plane anisotropy and a low symmetry with the C2h3 space group. Investigating the in-plane optical anisotropy, including the electron–photon and electron–phonon interactions of GaTe is essential in realizing its applications in optoelectronics and thermoelectrics. In this work, the anisotropic light-matter interactions in the low-symmetry material GaTe are studied using anisotropic optical extinction and Raman spectroscopies as probes. Our polarized optical extinction spectroscopy reveals the weak anisotropy in optical extinction spectra for visible light of multilayer GaTe. Polarized Raman spectroscopy proves to be sensitive to the crystalline orientation of GaTe, and shows the intricate dependences of Raman anisotropy on flake thickness, photon and phonon energies. Such intricate dependences can be explained by theoretical analyses employing first-principles calculations and group theory. Furthermore, these studies are a crucial step toward the applications of GaTe especially in optoelectronics and thermoelectrics, and provide a general methodology for the study of the anisotropy of light-matter interactions in 2D layered materials with in-plane anisotropy.},
doi = {10.1021/acsnano.6b05002},
journal = {ACS Nano},
number = 9,
volume = 10,
place = {United States},
year = {Tue Aug 16 00:00:00 EDT 2016},
month = {Tue Aug 16 00:00:00 EDT 2016}
}
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