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High-Q resonant cavities for terahertz quantum cascade lasers

  Articoli su Riviste JCR/ISI  (anno 2015)

Autori:  Campa A., Consolino L., Ravaro M., Mazzotti D., Vitiello M. S., Bartalini S., De Natale P

Affiliazione Autori:  INO, Istituto Nazionale di Ottica, CNR, Largo Fermi 6, Firenze, 50125, Italy; LENS, European Laboratory for Non-Linear Spectroscopy, Via Carrara 1, Sesto Fiorentino FI, 50019, Italy; NEST, Istituto Nanoscienze - CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy

Riassunto:  We report on the realization and characterization of two different designs for resonant THz cavities, based on wire-grid polarizers as input/output couplers, and injected by a continuous-wave quantum cascade laser (QCL) emitting at 2.55 THz. A comparison between the measured resonators parameters and the expected theoretical values is reported. With achieved quality factor Q approximate to 2.5 x 10(5), these cavities show resonant peaks as narrow as few MHz, comparable with the typical Doppler linewidth of THz molecular transitions and slightly broader than the free-running QCL emission spectrum. The effects of the optical feedback from one cavity to the QCL are examined by using the other cavity as a frequency reference. (C) 2015 Optical Society of America

Rivista/Giornale:  OPTICS EXPRESS
Volume n.:  23 (3)      Pagine da: 3751  a: 3761
Ulteriori informazioni:  This work was partly supported by the Italian Ministry of Education, University, and Research (MIUR) through the program FIRB-Futuro in Ricerca 2010, RBFR10LULP; Laserlab-Europe, grant agreement no. 284464, EU 7th Framework Program; ESFRI Roadmap, Extreme Light Infrastructure (ELI) project.
DOI: 10.1364/OE.23.003751

*Impact Factor della Rivista: (2015) 3.148   *Citazioni: 5
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  19/05/2019

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