A photonic-crystal optical antenna for extremely large local-field enhancement

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We propose a novel design of an all-dielectric optical antenna based on photonic-band-gap confinement. Specifically, we have engineered the photonic-crystal dipole mode to have broad spectral response (Q similar to 70) and well-directed vertical-radiation by introducing a plane mirror below the cavity. Considerably large local electric-field intensity enhancement similar to 4,500 is expected from the proposed design for a normally incident planewave. Furthermore, an analytic model developed based on coupled-mode theory predicts that the electric-field intensity enhancement can easily be over 100,000 by employing reasonably high-Q (similar to 10,000) resonators. (C) 2010 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2010-11
Language
English
Article Type
Article
Keywords

RAMAN-SCATTERING; SPONTANEOUS-EMISSION; HARMONIC-GENERATION; NANOCAVITIES; RESONATORS; MODES; POWER; SLAB

Citation

OPTICS EXPRESS, v.18, no.23, pp.24163 - 24177

ISSN
1094-4087
DOI
10.1364/OE.18.024163
URI
http://hdl.handle.net/10203/96570
Appears in Collection
PH-Journal Papers(저널논문)
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