Optical characterization of a SCISSOR device.

Here, we report on the design, fabrication and characterization of single-channel (SC-) and dual-channel (DC-) side-coupled integrated spaced sequences of optical resonators (SCISSOR) with a finite number (eight) of microring resonators using submicron silicon photonic wires on a silicon-on-insulator (SOI) wafer. We present results on the observation of multiple resonances in the through and the drop port signals of DC-SCISSOR. These result from the coupled resonator induced transparency (CRIT) which appears when the resonator band (RB) and the Bragg band (BB) are nearly coincident. We also observe the formation of high-Q (> 23000) quasi-localized modes in the RB of the drop transmission which appear when the RB and BB are well separated from each other. These multiple resonances and quasi-localized modes are induced by nanometer-scale structural disorders in the dimension of one or more rings. Finally, we demonstrate the tunability of RB (and BB) and localized modes in the DC-SCISSOR by thermo-optical or free-carrier refraction.

[1]  U. Fano.  Effects of Configuration Interaction on Intensities and Phase Shifts , 1961 .

[2]  Richard Soref,et al.  Apodized SCISSORs for filtering and switching. , 2008, Optics express.

[3]  Shanhui Fan,et al.  Sharp asymmetric line shapes in side-coupled waveguide-cavity systems , 2002 .

[4]  Qianfan Xu,et al.  Micrometre-scale silicon electro-optic modulator , 2005, Nature.

[5]  D. Van Thourhout,et al.  Compact Wavelength-Selective Functions in Silicon-on-Insulator Photonic Wires , 2006, IEEE Journal of Selected Topics in Quantum Electronics.

[6]  Y. P. Varshni.  Temperature dependence of the energy gap in semiconductors , 1967 .

[7]  M. Tomita,et al.  Tunable Fano interference effect in coupled-microsphere resonator-induced transparency , 2009 .

[8]  R. Boyd,et al.  Distributed and localized feedback in microresonator sequences for linear and nonlinear optics , 2004 .

[9]  F. Xia,et al.  Ultra-compact high order ring resonator filters using submicron silicon photonic wires for on-chip optical interconnects. , 2007, Optics express.

[10]  M. Lipson.  Guiding, modulating, and emitting light on Silicon-challenges and opportunities , 2005, Journal of Lightwave Technology.

[11]  M. Chin,et al.  Defect modes in micro-ring resonator arrays. , 2005, Optics express.

[12]  P. Dumon,et al.  Fabrication of Photonic Wire and Crystal Circuits in Silicon-on-Insulator Using 193-nm Optical Lithography , 2009, Journal of Lightwave Technology.

[13]  Guang-Can Guo,et al.  Analog to multiple electromagnetically induced transparency in all-optical drop-filter systems , 2007 .

[14]  D. Kwong,et al.  All-optical analog to electromagnetically induced transparency in multiple coupled photonic crystal cavities. , 2009, Physical review letters.

[15]  Thomas F. Krauss,et al.  Light scattering and Fano resonances in high-Q photonic crystal nanocavities , 2009 .

[16]  Xu,et al.  Scattering-theory analysis of waveguide-resonator coupling , 2000, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[17]  Roel Baets,et al.  Towards foundry approach for silicon photonics: silicon photonics platform ePIXfab , 2009 .

[18]  T. Shoji,et al.  Microphotonics devices based on silicon microfabrication technology , 2005, IEEE Journal of Selected Topics in Quantum Electronics.

[19]  Michal Lipson,et al.  Direct measurement of tunable optical delays on chip analogue to electromagnetically induced transparency. , 2006, Optics express.

[20]  F. Xia,et al.  Ultracompact optical buffers on a silicon chip , 2007 .

[21]  F. Xia,et al.  High-throughput silicon nanophotonic wavelength-insensitive switch for on-chip optical networks , 2008 .

[22]  Xiaodong Yang,et al.  Observation of femtojoule optical bistability involving fano resonances in high-Q/Vm silicon photonic crystal nanocavities , 2007 .