Control of cavity modes in coupled periodic waveguides
Date
2009
Authors
Lavrinenko, Andrei
Ha, Sangwoo
Sukhorukov, Andrey
Kivshar, Yuri
Journal Title
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Volume Title
Publisher
American Institute of Physics (AIP)
Abstract
We demonstrate that the modes of coupled cavities created in periodic waveguides can depend critically on the lateral shift between the cavities. In the absence of such shift, the modes feature symmetric or antisymmetric profiles, and their frequency splitting generally increases as the cavities are brought closer. We show that the longitudinal shift enables flexible control over the fundamental modes, which frequency detuning can be reduced down to zero. Our coupled-mode theory analysis reveals an intrinsic link between the mode tuning and the transformation of slow-light dispersion at the photonic band-edge. We illustrate our approach through direct numerical modelling of cavities created in arrays of dielectric rods, nanobeam structures, and two-dimensional photonic-crystal waveguides.
Description
Keywords
Keywords: Cavity; Photonic bandgap; Photonic-crystal
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Source
TACONA-Photonics 2009: Proceedings of the 2nd International Workshop
Type
Conference paper
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Restricted until
2037-12-31