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We present a planarized double metal waveguide platform for THz quantum cascade laser frequency combs with a wide top metallization, extending above the surrounding low-loss BCB polymer. Compared to a standard double metal waveguide, improvements in waveguide losses, RF and thermal properties are observed. Tapered waveguide devices display a field-enhancing effect, improving comb performance due to the enhanced four wave mixing process. These devices feature strong free-running beatnotes up to nearly -30 dBm and comb operation at high temperatures up to 115 K in continuous wave. Show more
Book titleConference on Lasers and Electro-Optics
Journal / seriesOSA Technical Digest
Pages / Article No.
Organisational unit03759 - Faist, Jérôme / Faist, Jérôme
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