Nonlinear trimer resonators for compact ultra-fast switching

We propose and numerically verify a scheme for compact optical modulation which can enable complex directional switching of signals in integrated micro-optical circuits within hundreds of femtoseconds. The scheme is based on a trimer comprised of two identical silica whispering gallery mode (WGM) mi...

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Veröffentlicht in:Optics express 2009-12, Vol.17 (25), p.23204-23212
Hauptverfasser: Yamaguchi, Kenzo, Fujii, Masamitsu, Haraguchi, Masanobu, Okamoto, Toshihiro, Fukui, Masuo
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container_end_page 23212
container_issue 25
container_start_page 23204
container_title Optics express
container_volume 17
creator Yamaguchi, Kenzo
Fujii, Masamitsu
Haraguchi, Masanobu
Okamoto, Toshihiro
Fukui, Masuo
description We propose and numerically verify a scheme for compact optical modulation which can enable complex directional switching of signals in integrated micro-optical circuits within hundreds of femtoseconds. The scheme is based on a trimer comprised of two identical silica whispering gallery mode (WGM) microresonators spaced by a central non-linear WGM resonator. The non-linear resonator is in the form of a silica cylinder with a thin coating of an ultrafast Kerr nonlinear material (a J-aggregate of cyanine dye). Using a two-dimensional finite-difference time-domain method and realistic material and structural parameters, we investigated the near-field coupling from a waveguide to the trimer and the subsequent switching process. In our scheme the sandwiched central control resonator has a resonant frequency that is mismatched to that of the input and output resonators. Therefore the optical energy is coupled from the waveguide into only the primary resonator in linear operation. However, for control light intensities of more than approximately 10(-2) W/microm the effective index and hence eigenfrequency of the central resonator can be shifted to match that of its neighbors and hence the optical energy can be redirected.
doi_str_mv 10.1364/OE.17.023204
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subjects Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Miniaturization
Nonlinear Dynamics
Refractometry - instrumentation
Signal Processing, Computer-Assisted - instrumentation
Transducers
Vibration
title Nonlinear trimer resonators for compact ultra-fast switching
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