Nondestructive photoacoustic detection of exciton resonances in GaAs/AlGaAs multiple quantum well structures

J. H. Chu, Y. H. Bak, J. H. Kim, H. L. Park, S. H. Park, U. Kim, J. G. Choi, I. G. Kim

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We report nondestructive observations of both heavy-hole and light-hole excitons in the GaAs/AlGaAs multiple quantum wells (MQWs) using photoacoustic spectroscopy. The absorption spectra were measured by the gas-microphone photoacoustic technique with a minimal volume cell and grazing incidence method. Two distinct peaks were clearly observed in the photoacoustic signal and phase spectra of the MQW at room temperature. A photoreflectance measurement for the given MQW structure revealed that two peaks originated from the heavy-hole and light-hole excitonic resonances.

Original languageEnglish
Pages (from-to)745-747
Number of pages3
JournalApplied Physics Letters
Issue number6
Publication statusPublished - 1994 Dec 1


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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