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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 21 — Nov. 1, 2009
  • pp: 3253–3255

Liquid-crystal tunable filter based on sapphire microspheres

Giovanni Gilardi, Domenico Donisi, Ali Serpengüzel, and Romeo Beccherelli  »View Author Affiliations

Optics Letters, Vol. 34, Issue 21, pp. 3253-3255 (2009)

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We design an integrated optoelectronic device based on the whispering-gallery modes of a sapphire microsphere integrated with a liquid-crystal tuning medium to produce a narrowband, electrically tunable, channel-dropping filter. The sapphire microsphere is glued over a diffused waveguide in a glass substrate. At the base of the microsphere, a small volume of liquid crystal is infiltrated. We numerically evaluate the performance of the device and demonstrate a voltage tuning of the narrowband resonances.

© 2009 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.4080) Fiber optics and optical communications : Modulation
(160.3710) Materials : Liquid crystals
(290.4020) Scattering : Mie theory
(300.0300) Spectroscopy : Spectroscopy
(140.3945) Lasers and laser optics : Microcavities

ToC Category:

Original Manuscript: July 17, 2009
Revised Manuscript: September 1, 2009
Manuscript Accepted: September 18, 2009
Published: October 19, 2009

Giovanni Gilardi, Domenico Donisi, Ali Serpengüzel, and Romeo Beccherelli, "Liquid-crystal tunable filter based on sapphire microspheres," Opt. Lett. 34, 3253-3255 (2009)

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  1. Lord Rayleigh, Scientific Papers (Cambridge U. Press), Vol. 5, pp. 617-620 (1912).
  2. M. Cai, O. Painter, and K. J. Vahala, Opt. Lett. 25, 1430 (2000). [CrossRef]
  3. T. Bilici, S. Isci, A. Kurt, and A. Serpengüzel, IEEE Photon. Technol. Lett. 16, 476 (2004). [CrossRef]
  4. H. C. Tapalian, J. P. Laine, and P. A Lane, IEEE Photon. Technol. Lett. 14, 1118 (2002). [CrossRef]
  5. R.K.Chang and A.J.Campillo, eds., Optical Processes in Microcavities (World Scientific, 1996). [CrossRef]
  6. S. M. Spillane, J. T. Kippenberg, and K. J. Vahala, Nature 415, 621 (2002). [CrossRef] [PubMed]
  7. M. Cai, G. Hunziker, and K. Vahala, IEEE Photon. Technol. Lett. 11, 686 (1999). [CrossRef]
  8. A. Serpengüzel, S. Arnold, and G. Griffel, Opt. Lett. 20, 654 (1995). [CrossRef] [PubMed]
  9. Y. Panitchob, G. S. Murugan, M. N. Zervas, P. Horak, S. Berneschi, S. Pelli, G. N. Conti, and J. S. Wilkinson, Opt. Express 16, 11066 (2008). [CrossRef] [PubMed]
  10. D. Armani, B. Min, A. Martin, and K. J. Vahala, Appl. Phys. Lett. 85, 5438 (2004). [CrossRef]
  11. A. d'Alessandro, D. Donisi, R. Asquini, R. Beccherelli, L. De Sio, and C. Umeton, Opt. Express 16, 9254 (2008). [CrossRef] [PubMed]
  12. D. C. Zografopoulos, E. E. Kriezis, B. Bellini, and R. Beccherelli, Opt. Express 15, 1832 (2007). [CrossRef] [PubMed]
  13. A. C. Tasolamprou, B. Bellini, D. C. Zografopoulos, E. E. Kriezis, and R. Beccherelli, J. Eur. Opt. Soc. Rapid Publ. 4, 09017 (2009). [CrossRef]
  14. B. Bellini, A. d'Alessandro, and R. Beccherelli, Opt. Mater. 29, 1019 (2007). [CrossRef]

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