A Novel Approach for the Fourier Transform of Photoreflectance Spectra

Jenn Shyong Hwang, Chung Chih Chang, Mei Fei Chen, Chia Wei Kuo, Yan Ten Lu

Research output: Contribution to journalArticlepeer-review


In a surface-intrinsic-n + (SIN +) structure, the strong electric field in the intrinsic layer gives rise to level splitting (∼20 meV) between heavy-hole (HH) and light-hole (LH) bands. This causes inaccuracy in the traditional scaling Fourier analysis of photoreflectance (PR). In this work, we present a novel technique for obtaining the valence-band split from the Fourier spectrum of PR of GaAs. A linear combination of the FKO spectra of HH and LH is adopted as a trial function. Besides two linear coefficients, the band gaps for HH and LH are also treated as adjusted parameters. We develop an efficient algorithm for fitting the trial function to the PR spectrum in Fourier space. The field-induced splits are observed in PR spectra obtained under various pump beam intensities.

Original languageEnglish
Pages (from-to)2851-2854
Number of pages4
JournalJournal of the Physical Society of Japan
Issue number12
Publication statusPublished - 2002 Dec

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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