Journal article
Heterogeneous terahertz quantum cascade lasers exceeding 1.9 THz spectral bandwidth and featuring dual comb operation
- Rösch, Markus ETH Zurich, Institute of Quantum Electronics, Auguste-Piccard-Hof 1, 8093 Zurich, Switzerland
- Beck, Mattias ETH Zurich, Institute of Quantum Electronics, Auguste-Piccard-Hof 1, 8093 Zurich, Switzerland
- Süess, Martin J. ETH Zurich, Institute of Quantum Electronics, Auguste-Piccard-Hof 1, 8093 Zurich, Switzerland
- Bachmann, Dominic TU Wien, Photonics Institute and Center for Micro- and Nanostructures, Gußhausstraße 27-29, 1040 Vienna, Austria
- Unterrainer, Karl TU Wien, Photonics Institute and Center for Micro- and Nanostructures, Gußhausstraße 27-29, 1040 Vienna, Austria
- Faist, Jérôme ETH Zurich, Institute of Quantum Electronics, Auguste-Piccard-Hof 1, 8093 Zurich, Switzerland
- Scalari, Giacomo ETH Zurich, Institute of Quantum Electronics, Auguste-Piccard-Hof 1, 8093 Zurich, Switzerland
Published in:
- Nanophotonics. - Walter de Gruyter GmbH. - 2018, vol. 7, no. 1, p. 237-242
English
Abstract 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.
- Language
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- English
- Open access status
- gold
- Identifiers
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- DOI 10.1515/nanoph-2017-0024
- ISSN 2192-8614
- Persistent URL
- https://folia.unifr.ch/global/documents/241397
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