Tunable Integrated Optical Filters Based on Sapphire Microspheres and Liquid Crystals (Contributo in atti di convegno)

Type
Label
  • Tunable Integrated Optical Filters Based on Sapphire Microspheres and Liquid Crystals (Contributo in atti di convegno) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1117/12.855978 (literal)
Alternative label
  • Gilardi G. 1 and Yilmaz Y. 2 and Murib , M. S. 2 and Asquini R. 3 and d'Alessandro A. 3 and Serpengüzel A. 3 and Beccherelli R. 3 (2010)
    Tunable Integrated Optical Filters Based on Sapphire Microspheres and Liquid Crystals
    in Proc. of SPIE Photonics Europe - Silicon Photonics and Photonic Integrated Circuits Vol. 7719, 7719-1E, Bruxelles (B) 12-16 Aprile 2010, Bruxelles, 12-16 Aprile 2010
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gilardi G. 1 and Yilmaz Y. 2 and Murib , M. S. 2 and Asquini R. 3 and d'Alessandro A. 3 and Serpengüzel A. 3 and Beccherelli R. 3 (literal)
Pagina inizio
  • 7719-1E1 (literal)
Pagina fine
  • 7719-1E7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://spiedigitallibrary.org/proceedings/resource/2/psisdg/7719/1/77191E_1?isAuthorized=no (literal)
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  • Proceedings of SPIE Photonics Europe - Silicon Photonics and Photonic Integrated Circuits (literal)
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  • 7719 (literal)
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  • 7719 (literal)
Rivista
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  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
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  • 1 Consiglio Nazionale delle ricerche - Istituto per la Microelettronica e Microsistemi, Roma, Italia 2 Koç University, Microphotonics Research Laboratory, Department of Physics, Istanbul, Turkey 3 Università Roma La Sapienza, Dipartimento di Ingegneria Elettronica, Roma, Italia (literal)
Titolo
  • Tunable Integrated Optical Filters Based on Sapphire Microspheres and Liquid Crystals (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 9780819481924 (literal)
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  • G. C. Righini, (literal)
Abstract
  • We present an integrated optical narrowband electrically tunable filter based on the whispering gallery modes of sapphire microspheres and double ion-exchanged channel BK7 glass waveguides. Tuning is provided by a liquid crystal infiltrated between the spheres and the glass substrate. By suitably choosing the radii of the spheres and of the circular apertures, upon which the spheres are positioned, arrays of different filters can be realized on the same substrate with a low cost industrial process. We evaluate the performance in terms of quality factor, mode spacing, and tuning range by comparing the numerical results obtained by the numerical finite element modeling approach and with the analytical approach of the Generalized Lorenz-Mie Theory for various design parameters. By reorienting the LC in an external electrical field, we demonstrate the tuning of the spectral response of the sapphire microsphere based filter. We find that the value of the mode spacing remains nearly unchanged for the different values of the applied electric field. An increase of the applied electric field strength, changes the refractive index of the liquid crystal, so that for a fixed geometry the mode spacing remains unchanged. (literal)
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