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Nonlinear trimer resonators for compact ultra-fast switching.

Kenzo Yamaguchi1, Masamitsu Fujii, Masanobu Haraguchi

  • 1Department of Electrical and Electronic Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan. yamaguchi@eee.tut.ac.jp

Optics Express
|January 7, 2010
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Summary
This summary is machine-generated.

We present a novel optical modulation scheme using a three-microresonator system for ultrafast signal switching in integrated photonic circuits. This method enables complex directional control of light signals in hundreds of femtoseconds.

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Area of Science:

  • Photonics
  • Nonlinear Optics
  • Materials Science

Background:

  • Integrated photonic circuits are crucial for modern optical communication and computation.
  • Efficient and fast optical switching is a key challenge in developing advanced micro-optical circuits.
  • Whispering Gallery Mode (WGM) microresonators offer unique light confinement and interaction properties.

Purpose of the Study:

  • To propose and numerically verify a compact optical modulation scheme for complex directional signal switching.
  • To achieve signal switching in integrated micro-optical circuits within hundreds of femtoseconds.
  • To investigate the potential of nonlinear WGM microresonators for ultrafast optical control.

Main Methods:

  • Numerical verification using a two-dimensional finite-difference time-domain (FDTD) method.
  • Modeling a trimer system of two identical silica WGM microresonators coupled to a central nonlinear WGM resonator.
  • Utilizing realistic material and structural parameters, including an ultrafast Kerr nonlinear material coating.

Main Results:

  • Demonstrated a scheme for compact optical modulation enabling complex directional switching.
  • Achieved signal switching in hundreds of femtoseconds.
  • Showcased that control light intensities above 10(-2) W/microm can shift the central resonator's eigenfrequency, redirecting optical energy.

Conclusions:

  • The proposed scheme offers a viable route for ultrafast optical signal switching in integrated photonic devices.
  • The nonlinear WGM microresonator trimer provides a compact and efficient platform for advanced optical modulation.
  • This work paves the way for novel functionalities in micro-optical circuits and all-optical signal processing.