A Comprehensive Study on the Optical Properties of Thin Gold-Doped Rhenium Disulphide Layered Single Crystals

被引：5

作者：

Huang, Chih-Cheng ^{[1
]}

Kao, Chen-Chia ^{[1
]}

Lin, Der-Yuh ^{[1
]}

Lin, Chih-Ming ^{[2
]}

Wu, Fan-Lei ^{[3
]}

Horng, Ray-Hua ^{[3
]}

Huang, Ying-Sheng ^{[4
]}

机构：

[1] Natl Changhua Univ Educ, Changhua 500, Taiwan

[2] Natl Hsinchu Univ Educ, Dept Appl Sci, Hsinchu 300, Taiwan

[3] Natl Chung Hsing Univ, Taichung 402, Taiwan

[4] Natl Taiwan Univ Sci & Technol, Dept Elect Engn, Taipei 106, Taiwan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2013年 / 52卷 / 04期

关键词：

BAND-EDGE TRANSITIONS; TEMPERATURE-DEPENDENCE; RES2; ANISOTROPY; SEMICONDUCTORS; SPECTROSCOPY;

D O I：

10.7567/JJAP.52.04CH11

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a comprehensive study on the optical properties of gold-doped rhenium disulphide (ReS2: Au) layer crystal. Its anisotropic optical properties were studied by using the polarization-dependent optical absorption and photoconductivity (PC) measurements. Absorption measurements indicate that the absorption edge shifted toward high energy as the sample was slimmed down to a thin piece. For the first time, excitonic transitions have been observed by this method. The room temperature transition energies were evaluated to be 1.48 eV for E-1(ex) and 1.516 eV for E-2(ex). E-1(ex) exciton dominates the transition as the polarization is parallel to the b-axis of the layer crystal, while E-2(ex) exciton is most present as the polarization is perpendicular. PC spectra are performed to check this anisotropic phenomenon. Thermoreflectance modulation (TR) and photoluminescence (PL) measurements have been performed in the temperature range of 42 to 300 K. The temperature dependence of the transition energies and broadening parameters were determined. (C) 2013 The Japan Society of Applied Physics

引用

页数：5

共 25 条

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