Broadband heterogeneous quantum cascade lasers

Manijeh Razeghi*, Neelanjan Bandyopadhyay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Heterogeneous quantum cascade lasers have emerged as an important broadband radiation source for mid-infrared spectroscopy and sensing. Multiple quantum cascade stages with discrete peak wavelengths are grown together in single active region to have a broad gain. Different wavelength laser can be chosen by appropriate feedback mechanism. Heterogeneous strain-balanced Al0.63In0.37As/ Ga0.35In0.65As/Ga0.47In0.53As quantum cascade lasers, having 5 and 6 quantum cascade stages respectively, has been demonstrated with gain between 6.2-9.9 μm and 5.9-10.9 μm in mid-infrared region.

Original languageEnglish (US)
Pages (from-to)135-143
Number of pages9
JournalNATO Science for Peace and Security Series B: Physics and Biophysics
StatePublished - 2017


  • Broadband laser
  • Mid-infrared
  • Quantum cascade lasers
  • Semiconductor lasers

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering


Dive into the research topics of 'Broadband heterogeneous quantum cascade lasers'. Together they form a unique fingerprint.

Cite this