Journal
ACS NANO
Volume 5, Issue 4, Pages 2831-2838Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn1033482
Keywords
optical nanocavity; photonic crystal; surface plasmon polariton; hybrid plasmonic mode
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Funding
- U.S. Department of Energy [DE-AC02-05CH11231]
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We propose a hybrid optical nanocavity consisting of photonic crystals coupled to a metal surface with a nanoscale air gap between. The hybridization of photonic crystal modes and, surface plasmons across the gap forms hybrid cavity modes, which are highly confined in the low-loss air gap region. Deep subwavelength mode volume and high quality factor are demonstrated at telecommunication wavelength, resulting in an extremely large Q/V-m ratio of 60 000 lambda(-3): This new type of high-Q/V-m, broad-band hybrid nanocavity opens up opportunities for various applications in enhanced light-matter interactions.
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