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Conferences > CLEO_Europe > 2007 > CB15 > CB15_4
  • CLEO/Europe and IQEC 2007 Conference Digest
  • (Optica Publishing Group, 2007),
  • paper CB15_4

THz microcavity lasers with sub-wavelength mode volumes and thresholds in the milli-Ampere range

Y. Chassagneux, J. Palomo, R. Colombelli, S. Barbieri, S. Dhillon, C. Sirtori, H. Beere, J. Alton, and D. Ritchie

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Abstract

Quantum cascade (QC) lasers are semiconductor injection lasers. However, in these devices electrons do not recombine with valence band holes, but instead undergo a quantum jump between quantized conduction band states, called subbands, of a suitably designed multi-quantum-well structure. The possibility of almost arbitrary design for the multi-quantum-well structure allows QC lasers to cover a wavelength range where few compact sources are available, i.e. the THz range (70 μm < λ < 200 μm).

© 2007 IEEE

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