Abstract
In this article, we present the optical study of undoped and Au-doped rhenium disulphide (ReS2 and ReS2:Au) using temperature- and polarization-dependent thermoreflectance (PTR) and reflectance (R) measurements. We have observed the indirect band gaps (Eg||, E g⊥), and direct band-edge excitonic transitions (E ex1, Eex2, Eex 3 and Eex4) at various polarization angles. The amplitudes of Eex1 and Eex2 transitions have an orthogonal characteristic and follow the Malus rule. A small blue-shift of indirect band gaps has been observed for the ReS2:Au sample, we believe that this result is contributed from the doping effects. We also measured the temperature-dependent PTR spectra in the temperature range from 55 to 300 K, and determined the temperature dependences of the transition energies and broadening parameters of Eex1 and E ex2 transitions. Reflectance measurements at various polarizations have been performed to confirm our observations.
| Original language | English |
|---|---|
| Article number | 04DH17 |
| Journal | Japanese Journal of Applied Physics |
| Volume | 50 |
| Issue number | 4 PART 2 |
| DOIs | |
| Publication status | Published - 2011 Apr 1 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
- Physics and Astronomy(all)
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Polarized thermoreflectance and reflectance study of ReS2 and ReS2:Au single crystals. / Huang, Tung Pai; Lin, Der-Yuh; Kao, Yu Cheng; Wu, Jyun De; Huang, Ying Sheng.
In: Japanese Journal of Applied Physics, Vol. 50, No. 4 PART 2, 04DH17, 01.04.2011.Research output: Contribution to journal › Article
TY - JOUR
T1 - Polarized thermoreflectance and reflectance study of ReS2 and ReS2:Au single crystals
AU - Huang, Tung Pai
AU - Lin, Der-Yuh
AU - Kao, Yu Cheng
AU - Wu, Jyun De
AU - Huang, Ying Sheng
PY - 2011/4/1
Y1 - 2011/4/1
N2 - In this article, we present the optical study of undoped and Au-doped rhenium disulphide (ReS2 and ReS2:Au) using temperature- and polarization-dependent thermoreflectance (PTR) and reflectance (R) measurements. We have observed the indirect band gaps (Eg||, E g⊥), and direct band-edge excitonic transitions (E ex1, Eex2, Eex 3 and Eex4) at various polarization angles. The amplitudes of Eex1 and Eex2 transitions have an orthogonal characteristic and follow the Malus rule. A small blue-shift of indirect band gaps has been observed for the ReS2:Au sample, we believe that this result is contributed from the doping effects. We also measured the temperature-dependent PTR spectra in the temperature range from 55 to 300 K, and determined the temperature dependences of the transition energies and broadening parameters of Eex1 and E ex2 transitions. Reflectance measurements at various polarizations have been performed to confirm our observations.
AB - In this article, we present the optical study of undoped and Au-doped rhenium disulphide (ReS2 and ReS2:Au) using temperature- and polarization-dependent thermoreflectance (PTR) and reflectance (R) measurements. We have observed the indirect band gaps (Eg||, E g⊥), and direct band-edge excitonic transitions (E ex1, Eex2, Eex 3 and Eex4) at various polarization angles. The amplitudes of Eex1 and Eex2 transitions have an orthogonal characteristic and follow the Malus rule. A small blue-shift of indirect band gaps has been observed for the ReS2:Au sample, we believe that this result is contributed from the doping effects. We also measured the temperature-dependent PTR spectra in the temperature range from 55 to 300 K, and determined the temperature dependences of the transition energies and broadening parameters of Eex1 and E ex2 transitions. Reflectance measurements at various polarizations have been performed to confirm our observations.
UR - http://www.scopus.com/inward/record.url?scp=79955392244&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955392244&partnerID=8YFLogxK
U2 - 10.1143/JJAP.50.04DH17
DO - 10.1143/JJAP.50.04DH17
M3 - Article
AN - SCOPUS:79955392244
VL - 50
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
SN - 0021-4922
IS - 4 PART 2
M1 - 04DH17
ER -