Optically pumped electrically driven THz generation - An approach for an efficient room-temperature THz quantum cascade laser?

Inès Waldueller, Weng W. Chow, Michael C. Wanke

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We investigate an optically pumped electrically driven laser scheme as an approach for terahertz (THz) quantum cascade lasers.The scheme keeps the advantages of optical conversion, and increases the efficiency by recycling the pump photons. Using a microscopic theory based on the Maxwell-semiconductor Bloch equations, we demonstrate that the approach offers a path to room-temperature THz generation. Furthermore, we show how successful recovery of the pump intensity can yield optical conversion efficiencies exceeding the Manley-Rowe limit.

Original languageEnglish (US)
Pages (from-to)1084-1088
Number of pages5
JournalIEEE Journal on Selected Topics in Quantum Electronics
Volume13
Issue number5
DOIs
StatePublished - Sep 2007
Externally publishedYes

Keywords

  • Gain without inversion
  • Intersubband semiconductor laser
  • Manley-Rowe quantum limit
  • Optical conversion
  • Quantum cascade laser (QCL)
  • Terahertz (THz) generation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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