Journal
APPLIED PHYSICS LETTERS
Volume 88, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2167801
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We propose an ultrahigh quality factor (Q) photonic crystal slab nanocavity created by the local width modulation of a line defect. We show numerically that this nanocavity has an intrinsic Q value of up to 7x10(7). Transmission measurements for fabricated Si photonic-crystal-slab nanocavities directly coupled to input/output waveguides have exhibited a loaded Q value of similar to 800 000. These theoretical and experimental Q values are very high for photonic crystal nanocavities. In addition, we demonstrate that simply shifting two holes away from a line defect is sufficient to achieve an ultrahigh Q value both theoretically and experimentally. (c) 2006 American Institute of Physics.
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