Detailed characterization of a systematic set of quantum dot infrared photodetectors

H. C. Liu*, B. Aslan, M. Korkusinski, Shun-Jen Cheng, P. Hawrylak

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

The results of a detailed characterization study on a systematic set of InAs/GaAs self-assembled quantum dot infrared photodetectors are presented. A simple physical picture is also discussed to account for the main observed features. Photoresponse characteristics in a wide spectral region from the mid- to far-infrared are reported. Clear polarization behaviors with a dominant P-polarized response in the mid-infrared and a strong S-response in the far-infrared regions are shown. These behaviors can be qualitatively understood in view of the quantum dot shape of a large in-plane diameter and a small height in the growth direction. With a set of three samples, effects of the number of electrons per quantum dot on the spectra are investigated.

Original languageEnglish
Pages (from-to)503-508
Number of pages6
JournalInfrared Physics and Technology
Volume44
Issue number5-6
DOIs
StatePublished - 21 Oct 2003

Keywords

  • Infrared photodetectors
  • Polarization
  • Quantum dots

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