Bow-Tie Cavity for Terahertz Radiation
Authors: Consolino L., Campa A., Mazzotti D., Vitiello M. S., De Natale P., Bartalini S.
Autors Affiliation: CNR – Istituto Nazionale di Ottica (INO)
European Laboratory for Non-linear Spectroscopy (LENS)
NEST, CNR – Istituto Nanoscienze and Scuola Normale Superiore
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 = 5.1×10^5. The resonator performances and the relevant parameters are theoretically predicted and discussed, and a comparison among simulated and experimental spectra is given.
Volume: 6 Pages from: 1-1 to: 1-8
KeyWords: terahertz radiation; optical cavity;