Tunable wavelength-selective add–drop in liquid crystals on a silicon microresonator

Abstract We propose and numerically investigate a tunable add–drop consisting of an optical disk microresonator embedded in nematic liquid crystals. The electro-optic cladding enables tunability via an external low-frequency voltage. All loss mechanisms as well as the features of the tunable filter are accounted for via a full-dimensional (3D + time) parallel Finite Difference Time Domain code.

[1]  Iam-Choon Khoo,et al.  Liquid Crystals: Physical Properties and Nonlinear Optical Phenomena , 1994 .

[2]  C. Conti,et al.  Wavelength shifting in photonic bandgap microcavities with isotropic media , 2004 .

[3]  Roel Baets,et al.  Modeling nematic liquid crystals in the neighborhood of edges , 2005 .

[4]  M. Peccianti,et al.  Signal processing by opto-optical interactions between self-localized and free propagating beams in liquid crystals , 2005, physics/0509063.

[5]  Richard A. Soref,et al.  Silicon-based optoelectronics , 1993, Proc. IEEE.

[6]  G. Assanto,et al.  Spatial soliton all-optical logic gates , 2006, IEEE Photonics Technology Letters.

[7]  G. Assanto,et al.  Linear array of Si-Ge heterojunction photodetectors monolithically integrated with silicon CMOS readout electronics , 2004, IEEE Journal of Selected Topics in Quantum Electronics.

[8]  Wim Bogaerts,et al.  Silicon-on-insulator optical waveguides with liquid crystal cladding for switching and tuning , 2003 .

[9]  G. Assanto,et al.  Parametric oscillations in photonic crystal slabs 3-D time-domain analysis , 2004, IEEE Photonics Technology Letters.

[10]  Steven G. Johnson,et al.  High-density integrated optics , 1999 .

[11]  Mary Lou Jepsen,et al.  A technology rollercoaster: Liquid crystal on silicon , 2007 .

[12]  R.F. Drayton,et al.  Congratulations to the 2005 MTT-S Undergraduate/Pregraduate Scholarship Awardees! , 2006, IEEE Microwave Magazine.

[13]  R. Beccherelli,et al.  Nematic Liquid Crystal Optical Channel Waveguides on Silicon , 2006, IEEE Journal of Quantum Electronics.

[14]  Nelson V. Tabiryan,et al.  Photoinduced critical opalescence and reversible all-optical switching in photosensitive liquid crystals , 2003 .

[15]  Marco Peccianti,et al.  Spatial solitons in nematic liquid crystals , 2003 .

[16]  Shanhui Fan,et al.  Coupling of modes analysis of resonant channel add-drop filters , 1999 .

[17]  H. Haus,et al.  Microring resonator channel dropping filters , 1997 .

[18]  Larry R. Dalton,et al.  Electrically Tunable Ring Resonators Incorporating Nematic Liquid Crystals as Cladding Layers , 2003 .

[19]  Francesco Simoni,et al.  Nonlinear optical properties of liquid crystals and polymer dispersed liquid crystals , 1997 .