Narrow-Linewidth Interwell THz Intersubband Emission

Abstract

Narrow-linewidth terahertz spontaneous emission resulting from interwell (or diagonal) intersubband transition from an electrically pumped multiple quantum-well (MQW) structure was observed. The center frequency of the emission peak is at 2.57 THz, and its full width at half maximum (FWHM) is 0.47 THz. The emission frequency is in good agreement with the calculated intersubband transition energy of 11.3 meV (corresponding to 2.7 THz) in a three-level system, which was designed to achieve population inversion between two radiative levels using LO-phonon assisted depopulation.

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Document Details

Document Type
Technical Report
Publication Date
Sep 29, 2000
Accession Number
ADP011731

Entities

People

  • Benjamin S. Williams
  • Bin Xu
  • Michael Melloch
  • Qing Hu

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Cascade Structures
  • Crystal Lattice Vibrations
  • Current Density
  • Electron Scattering
  • Emission Spectra
  • Energy Levels
  • Frequency
  • Ground State
  • Lasers
  • Measurement
  • Phonons
  • Quantum Efficiency
  • Quantum Wells
  • Radiation
  • Scattering
  • Semiconductors
  • Terahertz Radiation

Fields of Study

  • Materials science

Readers

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

Technology Areas

  • Quantum Computing