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Proceedings Paper

Polymeric waveguide components for THz quantum cascade laser outcoupling
Author(s): F. Castellano; H. Beere; D. Ritchie; M. S. Vitiello
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Paper Abstract

We study the use of polymeric components to achieve efficient outcoupling of radiation from double-metal-waveguide THz quantum cascade lasers. We employ cyclicolefincopolymer to realize optical fibers with diameters between 60mm and 1000mm, and characterize their absorption coefficient at 2.9THz. We show that assembling a fiber on the facet of a singleplasmon quantum cascade laser improves its far field radiation pattern, making it narrower. We also provide a design of a broadband directional coupler that can be used to couple radiation from a doublemetal quantum cascade laser waveguide into the tapered end of a metal coated optical fiber.

Paper Details

Date Published: 7 March 2014
PDF: 6 pages
Proc. SPIE 8985, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII, 89851F (7 March 2014); doi: 10.1117/12.2041219
Show Author Affiliations
F. Castellano, NEST, CNR, Scuola Normale Superiore (Italy)
H. Beere, Univ. of Cambridge (United Kingdom)
D. Ritchie, Univ. of Cambridge (United Kingdom)
M. S. Vitiello, NEST, CNR, Scuola Normale Superiore (Italy)

Published in SPIE Proceedings Vol. 8985:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII
Laurence P. Sadwick; Créidhe M. O'Sullivan, Editor(s)

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