Polarized thermoreflectance and reflectance study of ReS2 and ReS2:Au single crystals

Tung Pai Huang, Der-Yuh Lin, Yu Cheng Kao, Jyun De Wu, Ying Sheng Huang

Research output: Contribution to journalArticle

8 Citations (Scopus)

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 languageEnglish
Article number04DH17
JournalJapanese Journal of Applied Physics
Volume50
Issue number4 PART 2
DOIs
Publication statusPublished - 2011 Apr 1

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Single crystals
Polarization
reflectance
single crystals
polarization
Energy gap
Temperature
Rhenium
Reflectometers
rhenium
disulfides
blue shift
temperature
Doping (additives)
temperature dependence
energy

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Huang, Tung Pai ; Lin, Der-Yuh ; Kao, Yu Cheng ; Wu, Jyun De ; Huang, Ying Sheng. / Polarized thermoreflectance and reflectance study of ReS2 and ReS2:Au single crystals. In: Japanese Journal of Applied Physics. 2011 ; Vol. 50, No. 4 PART 2.
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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 journalArticle

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