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Enhanced second-harmonic generation in AlGaAs microring resonators.

Zhenshan Yang1, Philip Chak, Alan D Bristow

  • 1Department of Physics and Institute for Optical Sciences, University of Totonto, Ontario, Canada. zhenshan@physics.utoronto.ca

Optics Letters
|March 7, 2007
PubMed
Summary

Harnessing resonance effects in microring resonators boosts second-harmonic generation. An angular quasi-phase-matching scheme leverages polarization changes within the ring for high efficiency.

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Area of Science:

  • Nonlinear optics
  • Integrated photonics

Background:

  • Microring resonators offer enhanced light-matter interaction for nonlinear optical processes.
  • Second-harmonic generation (SHG) is a key process for frequency conversion in photonics.

Purpose of the Study:

  • To propose and investigate an angular quasi-phase-matching (QPM) scheme for efficient SHG in microring resonators.
  • To utilize the spatial dependence of polarization within the resonator for phase matching.

Main Methods:

  • Theoretical analysis of nonlinear wave propagation in microring resonators.
  • Modeling of angular quasi-phase-matching by controlling the position of nonlinear interaction.
  • Numerical simulations to evaluate SHG efficiency based on the proposed scheme.

Main Results:

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  • Demonstrated that resonance effects in microring resonators significantly enhance SHG.
  • Proposed an angular QPM scheme by exploiting the position-dependent polarization inside the ring.
  • Showcased the potential for highly efficient frequency conversion through this tailored phase-matching approach.

Conclusions:

  • The proposed angular QPM scheme offers a novel method for achieving highly efficient second-harmonic generation in microring resonators.
  • This approach provides precise control over phase matching by leveraging the unique polarization characteristics within the resonator structure.
  • The findings pave the way for advanced integrated photonic devices for frequency conversion applications.