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Field-enhancing tapered planarized waveguides for THz quantum cascade laser frequency combs
- Source :
- EPJ Web of Conferences, Vol 266, p 09007 (2022)
- Publication Year :
- 2022
- Publisher :
- EDP Sciences, 2022.
-
Abstract
- We present a new planarized waveguide geometry for THz quantum cascade laser frequency combs with improved waveguide losses, RF and thermal dissipation properties. Ridge devices display broadband free-running comb states, and the THz emission can be further broadened by RF injection. Tapered waveguide devices feature a strong field-enhancement effect, which results in an improved comb performance. This includes free-running comb states with strong single beatnotes up to nearly -30 dBm at 90 K, almost three orders of magnitude stronger than for ridge devices. Improved comb operation is maintained also for high operating temperatures, up to 115 K.
Details
- Language :
- English
- ISSN :
- 2100014X
- Volume :
- 266
- Database :
- Directory of Open Access Journals
- Journal :
- EPJ Web of Conferences
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.80482e746bf844cc86c239cb693faee6
- Document Type :
- article
- Full Text :
- https://doi.org/10.1051/epjconf/202226609007