Nematic liquid crystal waveguide arrays

• Autorzy: Brzdąkiewicz K. A. , Karpierz M. A. , Fratalocchi A. , Assanto G. , Nowinowski-Kruszelnicki E.
• Konferencja: International Workshop on Nonlinear Optics Applications ; (7 ; 17-20.06.2004 ; Konstancin, Poland)
• Języki publikacji: EN

Abstrakty

EN

We investigate linear and nonlinear light propagation in a voltage-tunable array of waveguide channels in undoped nematic liquid crystals. This novel geometry, based on a photonic structure with a periodic modulation of refractive index controlled by an electric field, offers a wealth of possibilities for the study of discrete optical phenomena. The structure, in conjunction with a giant, non-resonant and voltage-dependent reorientational nonlinearity, allows us to drive the system from bulk diffraction to discrete propagation. Theoretical and experimental investigations, carried out with near infrared light wavelength and powers of a few milliWatts, show the possibility of transverse light localization, resulting in discrete spatial solitons. Such array, with its voltage- and light-adjustable guided-wave confinement and coupling, exhibits potentials for the realization of multifunctional routers and all-optical signal processors with nematic liquid crystals.

Słowa kluczowe

EN

nonlinear optics; solitons; self-action effects; optical nonlinearity in liquid crystals; discrete diffraction

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2005
• Tom: Vol. 13, No. 2
• Strony: 107--122
• Opis fizyczny: Bibliogr. 23 poz., rys., wykr.

Twórcy

autor

Brzdąkiewicz K. A.

• Faculty of Physics, Warsaw University of Technology, 75 Koszykowa Str., 00-662 Warsaw, Poland

autor

Karpierz M. A.

• Faculty of Physics, Warsaw University of Technology, 75 Koszykowa Str., 00-662 Warsaw, Poland

autor

Fratalocchi A.

• NooEL-Nonlinear Optics and Optoelectronics Laboratory, University “Roma Tre”, Via della Vasca Navale 84, 00-146 Rome, Italy

autor

Assanto G.

• NooEL-Nonlinear Optics and Optoelectronics Laboratory, University “Roma Tre”, Via della Vasca Navale 84, 00-146 Rome, Italy

autor

Nowinowski-Kruszelnicki E.

• Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland

Bibliografia

• 1. F. Lederer, S. Darmanyan, and A. Kobyakov, “Discrete solitons”, in Spatial Solitons, edited by S. Trillo and W. Torruellas, Wiley, New York, 2002.
• 2. A.A. Sukhorukov, Y.S. Kivshar, H.S. Eisenberg, and Y. Silberberg, “Spatial optical solitons in waveguide arrays”, IEEE J. Quantum Electron. 39, 31 (2003).
• 3. D.N. Christodulides and E.D. Eugenieva, “Blocking and routing discrete solitons in two-dimensional networks of nonlinear waveguide arrays”, Phys. Rev. Lett. 87, 233901 (2001); E.D. Eugenieva, N.K. Efremidis, and D.N. Christodoulides, “Minimizing bending losses in two-dimensional discrete soliton networks”, Opt. Lett. 26, 1876 (2001), “Design of switching junctions for two-dimensional discrete soliton networks”, Opt. Lett. 26, 1978 (2001), “Minimizing bending losses in two-dimensional discrete soliton networks: errata”, Opt. Lett. 27, 369 (2002).
• 4. R. Morandotti, U. Peschel, J.S. Aitchison, H.S. Eisenberg, and Y. Silberberg, “Dynamics of discrete solitons in optical waveguide arrays”, Phys. Rev. Lett. 81, 2726 (1999).
• 5. W. Królikowski and Y.S. Kivshar, “Soliton-based optical switching in waveguide arrays”, J. Opt. Soc. Am. B13, 876 (1996).
• 6. O. Bang and P. Miller, “Exploiting discreteness for switching in waveguide arrays”, Opt. Lett. 21, 1105 (1996).
• 7. D.N. Christodoulides and R.I. Joseph, “Discrete self-focusing in nonlinear arrays of coupled waveguides”, Opt. Lett. 13, 794 (1988).
• 8. C. Etrich, F. Lederer, B. Malomed, T. Peschel, and U. Peschel, “Optical solitons in media with a quadratic nonlinearity”, in Progress in Optics, Vol. 41, pp. 483, edited by E. Wolf, Elsevier Science Publishers 2000; T. Peschel, U. Peschel, and F. Lederer, “Discrete bright solitary waves in quadratically nonlinear media”, Phys. Rev. E57, 1127 (1998).
• 9. J. Meier, G.I. Stegeman, Y. Silberberg, R. Morandotti, and J.S. Aitchison, “Nonlinear optical beam interactions in waveguide arrays”, Phys. Rev. Lett. 93, 093903 (2004).
• 10. R. Morandotti, H.S. Eisenberg, Y. Silberberg, M. Soler, and J.S. Aitchison, “Self-focusing and defocusing in waveguide arrays”, Phys. Rev. Lett. 86, 3296 (2001).
• 11. H.S. Eisenberg, Y. Silberberg, R. Morandotti, A.R. Boyd, and J.S. Aitchison, “Discrete spatial optical solitons in waveguide arrays”, Phys. Rev. Lett. 81, 3383 (1998); “Diffraction management”, Phys. Rev. Lett. 85, 1863 (2000).
• 12. P. Millar, J.S. Aitchison, J.U. Kang, G.I. Stegeman, A. Villeneuve, G.T. Kennedy, and W. Sibbett, J. Opt. Soc. Am. B14, 3224 (1997).
• 13. D. Cheskis, S. Bar-Ad, R. Morandotti, J.S. Aitchison, H.S. Eisenberg, Y. Silberberg, and D. Ross, “Strong spatiotemporal localization in a silica nonlinear waveguide array”, Phys. Rev. Lett. 91, 223901 (2003).
• 14. T. Pertsch, U. Peschel, F. Lederer, J. Burghoff, M. Will, S. Nolte, and A. Tunnermann, “Discrete diffraction in two-dimensional arrays of coupled waveguides in silica”, Opt. Lett. 29, 468 (2004).
• 15. N.K. Efremidis, S. Sears, D.N. Christodoulides, J.W. Fleischer, and M. Segev, “Discrete solitons in photorefractive optically induced photonic lattices”, Phys. Rev. E66, 046602 (2002).
• 16. J.W. Fleisher, T. Carmon, M. Segev, N.K. Efremidis, and D.N. Christodoulides, “Observation of discrete solitons in optically induced real time waveguide arrays”, Phys. Rev. Lett. 90, 023902 (2003); J.W. Fleisher, M. Segev, N.K. Efremidis, and D.N. Christodoulides, “Observation of two-dimensional discrete solitons in optically induced nonlinear photonic lattices”, Nature 422, 147 (2003).
• 17. R. Iwanow, R. Schiek, G.I. Stegeman, T. Pertsch, F. Lederer, Y. Min, and W. Sohler, “Observation of discrete quadratic solitons”, Phys. Rev. Lett. 93, 113902 (2004).
• 18. A. Fratalocchi, G. Assanto, K.A. Brzd¹kiewicz, and M.A. Karpierz, “Discrete propagation and spatial solitons in nematic liquid crystals”, Opt. Lett. 29, 1530 (2004).
• 19. I.C. Khoo and S.T. Wu, Optics and Nonlinear Optics of Liquid Crystals, World Scientific Publ., Singapore 1997; F. Simoni, Nonlinear Optical Properties of Liquid Crystals, World Scientific Publ., London, 1997.
• 20. M. Peccianti, G. Assanto, A. De Luca, C. Umeton, and I.C. Khoo, “Electrically assisted self-confinement and waveguiding in planar nematic liquid crystal cells”, Appl. Phys. Lett. 77, 7 (2000); M. Peccianti, K.A. Brzdąkiewicz, and G. Assanto, “Nonlocal spatial soliton interactions in nematic liquid crystals”, Opt. Lett. 27, 1460 (2002); G. Assanto and M. Peccianti, “Spatial solitons in nematic liquid crystals”, IEEE J. Quantum Electron. 39, 13 (2003); M.A. Karpierz, “Solitary waves in liquid crystalline waveguides”, Phys. Rev. E66, 036603 (2002); M.A. Karpierz, M. Sierakowski, M. Świłło, and T.R. Woliński, “Self focusing in liquid crystalline waveguides”, Mol. Cryst. Liq. Cryst. 320, 157 (1998).
• 21. N.V. Tabiryan, A.V. Sukhov, and B.Ya. Zel'dovich, “Orientational optical nonlinearity of liquid crystals”, Mol. Cryst. Liq. Cryst. 136, 1 (1986); P.J. Collings, M. Hird, Introductions to Liquid Crystals - Chemistry and Physics, Taylor & Francis, London 1997.
• 22. F. Lederer and Y. Silberberg, “Discrete solitons”, Opt. Photon. News 2, 49 (2002); D.N. Christodoulides, F. Lederer, and Y. Silberberg, “Discretising light behaviour in linear and nonlinear waveguide lattices”, Nature 424, 817 (2003).
• 23. A. Yariv, Optical Electronics in Modern Communications. Oxford Press, New York 1997.