Bow-Tie Cavity for Terahertz Radiation

Year: 2018

Authors: Consolino L., Campa A., Mazzotti D., Vitiello MS., De Natale P., Bartalini S.

Autors Affiliation: CNR, Ist Nazl Ott, Via N Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; LENS European Lab Nonlinear Spect, Via N Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; CNR, Ist Nanosci, NEST, Piazza San Silvestro 12, I-56127 Pisa, Italy; Scuola Normale Super Pisa, Piazza San Silvestro 12, I-56127 Pisa, Italy.

Abstract: We report on the development, testing, and performance analysis of a bow-tie resonant cavity for terahertz (THz) radiation, injected with a continuous-wave 2.55 THz quantum cascade laser. The bow-tie cavity employs a wire-grid polarizer as input/output coupler and a pair of copper spherical mirrors coated with an unprotected 500 nm thick gold layer. The improvements with respect to previous setups have led to a measured finesse value F = 123, and a quality factor Q = 5.1 center dot 10(5). The resonator performances and the relevant parameters are theoretically predicted and discussed, and a comparison among simulated and experimental spectra is given.

Journal/Review: PHOTONICS

Volume: 6 (1)      Pages from: 1-1  to: 1-8

More Information: The authors acknowledge financial support by: European Union FET-Open grant 665,158-ULTRAQCL project; European Union ERC Consolidator grant 681,379-SPRINT; European ESFRI Roadmap Extreme Light Infrastructure-ELI project; European Commission-H2020 Laserlab-Europe, EC grant agreement number: 654148.
KeyWords: resonant cavity; terahertz radiation; quantum cascade laser
DOI: 10.3390/photonics6010001

Citations: 6
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