High efficiency coupling of Terahertz micro-ring quantum cascade lasers to the low-loss optical modes of hollow metallic waveguides (Articolo in rivista)

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  • High efficiency coupling of Terahertz micro-ring quantum cascade lasers to the low-loss optical modes of hollow metallic waveguides (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Vitiello M.S, J.H. Xu, M. Kumar, F. Beltram, A. Tredicucci, O. Mitrofanov, H.E. Beere, D.A. Ritchie (2011)
    High efficiency coupling of Terahertz micro-ring quantum cascade lasers to the low-loss optical modes of hollow metallic waveguides
    in Optics express
    (literal)
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  • Vitiello M.S, J.H. Xu, M. Kumar, F. Beltram, A. Tredicucci, O. Mitrofanov, H.E. Beere, D.A. Ritchie (literal)
Pagina inizio
  • 1122 (literal)
Pagina fine
  • 1130 (literal)
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  • 19 (literal)
Rivista
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  • DOI: 10.1364/OE.19.001122 Acknowledgment: We would like to acknowledge Lukas Mahler for the contribution in the device fabrication. This work was partly supported by the FIRB project NG-Lab of the Italian Ministry of Research and by the Fondazione Monte dei Paschi di Siena. (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • - CNR Ist Nazl Fis Applicata Nello Carrara, I-50019 Sesto Fiorentino, Italy (M.S. Vitiello) - Scuola Normale Super Pisa, I-56127 Pisa, Italy (J.H. Xu, M. Kumar, F. Beltram, A. Tredicucci) - CNR Ist Nanosci, NEST, I-56127 Pisa, Italy (J.H. Xu, M. Kumar, F. Beltram, A. Tredicucci) 4. UCL, Dept Elect & Elect Engn, London WC1E 7JE, England (O. Mitrofanov) 5. Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England (Beere, H.E. Beere, D.A. Ritchie) (literal)
Titolo
  • High efficiency coupling of Terahertz micro-ring quantum cascade lasers to the low-loss optical modes of hollow metallic waveguides (literal)
Abstract
  • We demonstrate that azimuthally polarized surface emitting Terahertz quantum cascade lasers fabricated in a micro-ring resonator geometry can be coupled to cylindrical hollow aluminum waveguides reaching efficiencies as high approximate to 98%, when a collimating lens is used. By placing the waveguide in close contact with the QCL in a simple back-to-back geometry, the laser mode can be perfectly matched with the low loss TE(01) waveguide mode showing attenuation losses as low as approximate to 2.3-2.7 dB/m at 3.2 THz. (C) 2011 Optical Society of America (literal)
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