Optical functions of bulk and epitaxial GaSP from 0.0025 to 6 eV

M. Patrini, G. Guizzetti, M. Galli, R. Ferrini, A. Bosacchi, S. Franchi, R. Magnanin

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The complex refraction index and dielectric functions of GaSb bulk (both p and n-type) and MBE film were accurately determined from 0.0025 to 6 eV by using reflectance and ellipsometric spectroscopies, These functions, which satisfy the Kramers-Kronig causality relations, appear independent on the doping (≤ 2 × 1017 cm-3) in the interband transition region. In particular, in comparison with previous data from literature, the E0 fundamental gap is well evidenced for all the samples. Moreover, the optical functions around the gap are very different from those previously reported and the refractive index was modeled by a Sellmeier dispersion relation. The free-carriers instead strongly influence the far-infrared restrahlen region due to the phonon-plasmon coupling. In this range the optical functions were well fitted by Drude-Lorentz oscillators.

Original languageEnglish
Pages (from-to)93-98
Number of pages6
JournalSolid State Communications
Volume101
Issue number2
Publication statusPublished - Jan 1997

Fingerprint

Kramers-Kronig relations
Refraction
Molecular beam epitaxy
refraction
Refractive index
Doping (additives)
oscillators
Spectroscopy
refractivity
Infrared radiation
reflectance
spectroscopy

Keywords

  • A. semiconductors
  • B. epitaxy
  • D. optical properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Patrini, M., Guizzetti, G., Galli, M., Ferrini, R., Bosacchi, A., Franchi, S., & Magnanin, R. (1997). Optical functions of bulk and epitaxial GaSP from 0.0025 to 6 eV. Solid State Communications, 101(2), 93-98.

Optical functions of bulk and epitaxial GaSP from 0.0025 to 6 eV. / Patrini, M.; Guizzetti, G.; Galli, M.; Ferrini, R.; Bosacchi, A.; Franchi, S.; Magnanin, R.

In: Solid State Communications, Vol. 101, No. 2, 01.1997, p. 93-98.

Research output: Contribution to journalArticle

Patrini, M, Guizzetti, G, Galli, M, Ferrini, R, Bosacchi, A, Franchi, S & Magnanin, R 1997, 'Optical functions of bulk and epitaxial GaSP from 0.0025 to 6 eV', Solid State Communications, vol. 101, no. 2, pp. 93-98.
Patrini M, Guizzetti G, Galli M, Ferrini R, Bosacchi A, Franchi S et al. Optical functions of bulk and epitaxial GaSP from 0.0025 to 6 eV. Solid State Communications. 1997 Jan;101(2):93-98.
Patrini, M. ; Guizzetti, G. ; Galli, M. ; Ferrini, R. ; Bosacchi, A. ; Franchi, S. ; Magnanin, R. / Optical functions of bulk and epitaxial GaSP from 0.0025 to 6 eV. In: Solid State Communications. 1997 ; Vol. 101, No. 2. pp. 93-98.
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