Coupling between the exciton and cavity modes in a GaAs/GaAlAs asymmetric microcavity structure

D. Y. Lin, Y. H. Chou, Y. S. Huang, K. K. Tiong

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The coupling effect between the cavity mode and excitonic states in a GaAsGaAlAs asymmetric microcavity structure was studied via angle and temperature dependent reflectance and piezoreflectance (PzR) measurements in the angular range 10°<θinc<60° and temperature range 20 K<T<300 K. The so-called cavity mode (CM) consists of photonic waves confined in the microcavity, and shifts to higher energy with increasing angle or decreasing temperature, whereas the angle independent excitonic states of the quantum well structure shift to higher energy with decreasing temperature. By varying the angle of incidence of the probe beam and temperature, the coupling strength between the excitonic transitions and CM can be tuned. The related PzR features have shown significant enhancement when the cavity mode matches up with the excitonic transitions. A detailed experimental study of the resonance enhancement effect between the excitonic transitions and CM is presented.

Original languageEnglish
Article number093511
JournalJournal of Applied Physics
Issue number9
Publication statusPublished - 2005 May 1


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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