Intersubband Lasers at Infrared and Terahertz Frequencies

Abstract

This research project was aimed at an investigation of far-infrared (FIR) and terahertz (THz) sources using intersubband transitions in step quantum well structures. Theoretical studies were carried out in order to determine the optical gain spectra. The intersubband gain was formulated as a function of the dipole matrix elements, the lineshape function, and the electron distribution functions in the lasing subbands. The dependence of the spectral gain on optical phonon scattering was investigated. Non-Lorentzian lineshape functions were obtained and it was found that the magnitude and overall shape of the spectral gain are significantly modified by the intra- and inter-subband phonon scattering rates. Effects of the confined phonon modes were evaluated and it was found that they have a significant effect on the devices considered.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 2000
Accession Number
ADA384408

Entities

People

  • George I. Haddad

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Computer Science
  • Crystal Lattice Vibrations
  • Distribution Functions
  • Electrical Engineering
  • Electronics Laboratories
  • Electrons
  • Frequency
  • Lasers
  • Phonons
  • Quantum Cascade Lasers
  • Quantum Well Lasers
  • Quantum Wells
  • Scattering
  • Semiconductor Lasers
  • Semiconductors
  • Solid State Electronics
  • Terahertz Radiation

Fields of Study

  • Materials science

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Spectroscopy.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers
  • Microelectronics
  • Quantum Computing