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Proceedings Paper

Terahertz quantum cascade laser coupled with high efficiency to the low loss optical modes of cylindrical hollow-core waveguides
Author(s): Miriam S. Vitiello; J. H. Xu; F. Beltram; A. Tredicucci; O. Mitrofanov; James A. Harrington; H. E. Beere; D. A. Ritchie
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Paper Abstract

We demonstrate that azimuthally polarized micro-ring THz quantum-cascade lasers can be coupled to hollow metallic waveguides with efficiencies ≥96% and perfectly matched with the TE01 waveguide mode, giving attenuation losses < 3dB/m. The use of Ag coated-flexible pipe waveguides allows propagation of either vertically polarized or azimuthally polarized QCL beams with propagation losses as low as 2.1-4.4 dB/m and bending losses lower than 1.2 dB.

Paper Details

Date Published: 8 September 2011
PDF: 7 pages
Proc. SPIE 8119, Terahertz Emitters, Receivers, and Applications II, 81190F (8 September 2011); doi: 10.1117/12.899132
Show Author Affiliations
Miriam S. Vitiello, CNR-IFAC (Italy)
Istituto Nanoscienze and Scuola Normale Superiore, CNR (Italy)
J. H. Xu, Istituto Nanoscienze and Scuola Normale Superiore, CNR (Italy)
F. Beltram, Istituto Nanoscienze and Scuola Normale Superiore, CNR (Italy)
A. Tredicucci, Istituto Nanoscienze and Scuola Normale Superiore, CNR (Italy)
O. Mitrofanov, Univ. College London (United Kingdom)
James A. Harrington, Rutgers, The State Univ. of New Jersey (United States)
H. E. Beere, Univ. of Cambridge (United Kingdom)
D. A. Ritchie, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 8119:
Terahertz Emitters, Receivers, and Applications II
Manijeh Razeghi; Nicolas Péré-Laperne; Henry O. Everitt; John M. Zavada; Tariq Manzur, Editor(s)

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