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1 results

  • 11 - Terahertz Quantum Cascade Laser Sources Based on Intra-Cavity Difference-Frequency Generation

  • from Part II - Active Research Topics
  • Edited by Dan Botez, University of Wisconsin, Madison, Mikhail A. Belkin, Technische Universität München
  • Book:
    Mid-Infrared and Terahertz Quantum Cascade Lasers
    Published online:
    25 August 2023
    Print publication:
    14 September 2023, pp 342-370

  • Summary

    Terahertz quantum cascade laser sources based on intra-cavity difference frequency generation are currently the only electrically-pumped monolithic semiconductor light sources providing broadly-tunable terahertz output at frequencies up to 6 THz at room temperature. Relying on the active regions with the giant second-order nonlinear susceptibility and the Cherenkov phase matching scheme, these devices demonstrated drastic improvements in performance in the past several years and can now produce narrow-linewidth single-mode terahertz emission that is tunable from below 1 THz to almost 6 THz with power output sufficient for imaging and spectroscopic applications. This chapter provides a comprehensive overview of this device technology