Heterogeneous terahertz quantum cascade lasers exceeding 1.9 THz spectral bandwidth and featuring dual comb operation

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  • Markus Rösch
    ETH Zurich, Institute of Quantum Electronics , Auguste-Piccard-Hof 1 , 8093 Zurich , Switzerland
  • Mattias Beck
    ETH Zurich, Institute of Quantum Electronics , Auguste-Piccard-Hof 1 , 8093 Zurich , Switzerland
  • Martin J. Süess
    ETH Zurich, Institute of Quantum Electronics , Auguste-Piccard-Hof 1 , 8093 Zurich , Switzerland
  • Dominic Bachmann
    TU Wien, Photonics Institute and Center for Micro- and Nanostructures , Gußhausstraße 27-29 , 1040 Vienna , Austria
  • Karl Unterrainer
    TU Wien, Photonics Institute and Center for Micro- and Nanostructures , Gußhausstraße 27-29 , 1040 Vienna , Austria
  • Jérôme Faist
    ETH Zurich, Institute of Quantum Electronics , Auguste-Piccard-Hof 1 , 8093 Zurich , Switzerland
  • Giacomo Scalari
    ETH Zurich, Institute of Quantum Electronics , Auguste-Piccard-Hof 1 , 8093 Zurich , Switzerland

Description

<jats:title>Abstract</jats:title> <jats:p>We report on a heterogeneous active region design for terahertz quantum cascade laser based frequency combs. Dynamic range, spectral bandwidth and output power have been significantly improved with respect to previous designs. When individually operating the lasers, narrow and stable intermode beatnote indicate frequency comb operation up to a spectral bandwidth of 1.1 THz, while in a dispersion-dominated regime a bandwidth up to 1.94 THz at a center frequency of 3 THz can be reached. A self-detected dual-comb setup has been used to verify the frequency comb nature of the lasers.</jats:p>

Journal

  • Nanophotonics

    Nanophotonics 7 (1), 237-242, 2017-09-05

    Walter de Gruyter GmbH

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