First-principles calculation of optical properties of germanium under pressure

Hao Chen, Min Li, Norhana Arsad, Songhua Xie

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The absorption of Germanium (Ge) rises dramatically with decreased incident wavelength in the absorption region of ≤1900nm, where the absorption would affect the measurement of refractive index, on the other hand has no absorption in the transparence region of >1900nm. The band structure and optical properties of Ge is calculated within the framework of density functional theory with local density approximation (DFT-LDA). The results show that the band gap is 0.571eV, which is closer to the experimental value as compared to Generalized Gradient Approximation (GGA) calculations. As the pressure increases from 0 to 2 GPa, the indirect band gap increases linearly with a gradient of 4.29× 10-2 eV/GPa, and the refractive index reduces linearly with a gradient of 5.903×10-2 /GPa.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8924
DOIs
Publication statusPublished - 2013
Event4th Asia-Pacific Optical Sensors Conference 2013, APOS 2013 - Wuhan
Duration: 15 Oct 201318 Oct 2013

Other

Other4th Asia-Pacific Optical Sensors Conference 2013, APOS 2013
CityWuhan
Period15/10/1318/10/13

Fingerprint

Germanium
First-principles Calculation
Optical Properties
germanium
Refractive index
Energy gap
Absorption
Optical properties
optical properties
Local density approximation
Band Gap
Band structure
gradients
Refractive Index
Density functional theory
Linearly
refractivity
Gradient
Wavelength
transparence

Keywords

  • First-principle calculations
  • Ge
  • Optical properties
  • Pressure
  • Refractive index

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Chen, H., Li, M., Arsad, N., & Xie, S. (2013). First-principles calculation of optical properties of germanium under pressure. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8924). [892408] https://doi.org/10.1117/12.2031874

First-principles calculation of optical properties of germanium under pressure. / Chen, Hao; Li, Min; Arsad, Norhana; Xie, Songhua.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8924 2013. 892408.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chen, H, Li, M, Arsad, N & Xie, S 2013, First-principles calculation of optical properties of germanium under pressure. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8924, 892408, 4th Asia-Pacific Optical Sensors Conference 2013, APOS 2013, Wuhan, 15/10/13. https://doi.org/10.1117/12.2031874
Chen H, Li M, Arsad N, Xie S. First-principles calculation of optical properties of germanium under pressure. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8924. 2013. 892408 https://doi.org/10.1117/12.2031874
Chen, Hao ; Li, Min ; Arsad, Norhana ; Xie, Songhua. / First-principles calculation of optical properties of germanium under pressure. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8924 2013.
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