Photocurrent measurements on a quantum cascade laser device by Fourier transform infrared microscope

Eli Christopher I. Enobio, Hiroki Sato, Keita Ohtani, Yuzo Ohno, Hideo Ohno

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Intersubband photocurrent in the InAs/AlSb mid-infrared quantum cascade laser (QCL) device is measured. To characterize subband energies in a fabricated and functioning QCL laser device, Fourier-transform infrared (FTIR) microscope is used to focus the probe light on the cleaved mirror of QCL. Photocurrent associated with intersubband transitions in the active layer are observed up to room temperature and the origin of peaks is identified by numerical simulation, which demonstrates the potential as a characterization tool for QCL devices.

Original languageEnglish
Article number06FE15
JournalJapanese journal of applied physics
Volume51
Issue number6 PART 2
DOIs
Publication statusPublished - 2012 Jun 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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