Efficient Second Harmonic Generation Through Selective Photonic Crystal-Microcavity Coupling

In this paper, a new 2-D frequency converter based on second harmonic generation (SHG) in GaAs photonic crystal waveguides is proposed. The input waveguide, where the second order nonlinear process takes place, is coupled to a secondary waveguide that is designed to allow only SH propagation. A row...

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Bibliographic Details
Published in:Journal of lightwave technology 2009-11, Vol.27 (21), p.4763-4772
Main Authors: Letizia, R., Obayya, S.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Couplings
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Frequency conversion
Frequency converters
Fundamental areas of phenomenology (including applications)
Gallium arsenide
Integrated optics. Optical fibers and wave guides
Joining
Microcavities
multiresolution time domain (MRTD)
Nonlinearity
Optical and optoelectronic circuits
Optical materials
Optics
Perfectly matched layers
Performance analysis
Photonic bandgap materials
Photonic crystals
Physics
Resonance
Second harmonic generation
second harmonic generation (SHG)
Time domain analysis
Tuning
waveguide-microcavities coupling
Waveguides
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Summary:In this paper, a new 2-D frequency converter based on second harmonic generation (SHG) in GaAs photonic crystal waveguides is proposed. The input waveguide, where the second order nonlinear process takes place, is coupled to a secondary waveguide that is designed to allow only SH propagation. A row of photonic crystal microcavity resonators is then placed parallel to the waveguides in order to assist the field coupling. By tuning the resonance of the microcavities at second harmonic wave, the waveguides-microcavities arrangement showed good enhancement of conversion efficiency and selectivity. The performance of the proposed frequency converter has been analyzed by using multiresolution time domain (MRTD) scheme developed for nonlinear problems in conjunction with uniaxial perfectly matched layer (UPML) boundary conditions that rigorously truncate the computational window.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2009.2026490