Planarized waveguides for high-performance THz quantum cascade laser frequency combs

Urban Senica; Tudor Olariu; Andres Forrer; Mattias Beck; Jérôme Faist; Giacomo Scalari

doi:10.1117/12.2609363

5 March 2022 Planarized waveguides for high-performance THz quantum cascade laser frequency combs

Urban Senica, Tudor Olariu, Andres Forrer, Mattias Beck, Jérôme Faist, Giacomo Scalari

Proceedings Volume PC12009, Quantum Sensing and Nano Electronics and Photonics XVIII; PC120090E (2022) https://doi.org/10.1117/12.2609363
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We present a planarized double metal waveguide THz quantum cascade laser, where the top contact metallization extends beyond the active region, above the surrounding low-loss BCB polymer. Placing wire bonds over the BCB-covered area enables the fabrication of extremely narrow waveguide dimensions with reduced power dissipation. Compared to a standard double metal waveguide, improvements in waveguide losses, dispersion, RF and thermal properties are observed. Measurement results feature frequency comb operation with free-running beatnotes as strong as -30 dBm, self-starting harmonic states, RF-driven broadband emission, comb operation up to 110 K, and laser operation up to 118 K in continuous-wave.

Conference Presentation

Citation Download Citation

Urban Senica, Tudor Olariu, Andres Forrer, Mattias Beck, Jérôme Faist, and Giacomo Scalari "Planarized waveguides for high-performance THz quantum cascade laser frequency combs", Proc. SPIE PC12009, Quantum Sensing and Nano Electronics and Photonics XVIII, PC120090E (5 March 2022); https://doi.org/10.1117/12.2609363

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