Friday, January 4, 2013

1301.0367 (Aaron C. Hryciw et al.)

Optical design of split-beam photonic crystal nanocavities    [PDF]

Aaron C. Hryciw, Paul E. Barclay
Photonic crystal nanobeam cavities are attractive due to their high quality factors, small mode volume, low effective mass, and small physical footprint. Here we demonstrate that a high quality factor photonic crystal nanobeam can be formed by two mechanically isolated cantilevers. The resulting cavity has a physical gap in the center, enabling axial or torsional oscillation of one or both of the cavity halves. By considering the optical band structure and mode profiles of silicon waveguides perforated by elliptical holes and rectangular gaps, such "split-beam cavity" designs with quality factors exceeding 10E6 at free-space resonance wavelengths of ~ 1.6 um are achieved in finite-difference time-domain electromagnetic simulations.
View original: http://arxiv.org/abs/1301.0367

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