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As a centrosymmetric crystal, bulk silicon lacks the crucial second-order nonlinearity chi(2) - the cornerstone of parametric light conversion. Although it has been demonstrated that mechanical stress can create chi(2) effects, efficient parametric chi(2) processes require a means to achieve phase matching. A powerful approach for efficient parametric conversion is quasi-phase matching (QPM) by periodic...
We propose a new class of photonic devices based on periodic stress fields in silicon. Our approach creates quasi-phase matched second-order nonlinear processes that can be used, for example, for efficient midwave-infrared generation.
This paper is the first report on dynamic control of birefringence in silicon-on-insulator (SOI) waveguides by electronically tuning the stress in the waveguide. The dynamic stress is induced by a thin-film piezoelectric transducer integrated on top of the waveguide. Integrated piezoelectric transducers are used to electrically vary the dispersion in a silicon optical waveguide.
We propose two-dimensional photonic-crystal-embedded microcavities. Numerical simulations of waveguide-coupled square microcavities with square lattice of holes reveal spatially selective high-Q resonances with maximum internal field intensity about two orders of magnitude of the input field
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