Extraction of infrared optical constants from fringing reflectance spectra

Pei-Kang Chung, Shun-Tung Yen*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We propose a simple and reliable method for extracting the optical constants of homogeneous dielectrics which can be pure or impure, and polar or nonpolar. The extraction is made from fringing reflectance spectra of slab samples with and without metal on the backside. The method is demonstrated to work well for polar semiconductors GaAs and InP in the infrared regime. The extracted extinction coefficient spectra exhibit plenty of features which correspond well to those in absorption and Raman spectra. (C) 2014 AIP Publishing LLC.

Original languageEnglish
Article number153101
Number of pages6
JournalJournal of Applied Physics
Volume116
Issue number15
DOIs
StatePublished - 21 Oct 2014

Keywords

  • COMPLEX REFRACTIVE-INDEX
  • TRANSPARENT SUBSTRATE
  • PHONON FREQUENCIES
  • THIN-LAYER
  • THICKNESS
  • TRANSMITTANCE
  • ABSORPTION
  • FILM
  • SLAB

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