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Related Experiment Videos

Second-harmonic generation in one-dimensional photonic edge waveguides.

Y Dumeige1, F Raineri, A Levenson

  • 1Laboratoire de Photonique et de Nanostructures, CNRS UPR 20, Route de Nozay, 91460 Marcoussis, France.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 3, 2004
PubMed
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Diffraction losses limit second-harmonic conversion efficiency in photonic crystal waveguides. This study proposes an efficient scheme using AlGaAs waveguides and an analytical model to overcome these limitations.

Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Diffraction losses in one-dimensional photonic crystal (PC) waveguides significantly impede second-harmonic (SH) conversion efficiency.
  • Understanding and mitigating these losses, particularly at the SH wavelength, is crucial for advancing nonlinear optical devices.

Purpose of the Study:

  • To numerically investigate diffraction losses in PC waveguides at the SH wavelength.
  • To propose an efficient SH conversion scheme in Al(x)Ga(1-x)As/air-etched waveguides.
  • To develop an analytical model for extrapolating conversion efficiency beyond the limits of numerical simulations.

Main Methods:

  • Utilized a finite difference time domain (FDTD) code incorporating second-order nonlinear polarization for numerical analysis.
  • Employed an analytical model to predict conversion efficiency for larger numbers of waveguide periods.

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Main Results:

  • Identified diffraction losses at the SH wavelength as a key bottleneck for conversion efficiency.
  • Demonstrated the potential of Al(x)Ga(1-x)As/air-etched waveguides for efficient SH conversion.
  • Validated the analytical model's ability to extrapolate FDTD simulation results.

Conclusions:

  • The proposed Al(x)Ga(1-x)As/air-etched waveguide design offers an efficient route for SH conversion.
  • The combination of FDTD simulations and analytical modeling provides a powerful approach to optimize PC waveguide performance.
  • This work contributes to the development of more efficient nonlinear optical devices.