General properties of dielectric optical antennas
Optics Express, Vol. 17, Issue 26, pp. 24084-24095 (2009)
http://dx.doi.org/10.1364/OE.17.024084
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Abstract
Using Mie theory we derive a number of general results concerning the resonances of spherical and cylindrical dielectric antennas. Specifically, we prove that the peak scattering cross-section of radiation-limited antennas depends only on the resonance frequency and thus is independent of refractive index and size, a result which is valid even when the resonator is atomic-scale. Furthermore, we derive scaling limits for the bandwidth of dielectric antennas and describe a cylindrical mode which is unique in its ability to support extremely large bandwidths even when the particle size is deeply subwavelength. Finally, we show that higher Q antennas may couple more efficiently to an external load, but the optimal absorption cross-section depends only on the resonance frequency.
© 2009 OSA
OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(290.4020) Scattering : Mie theory
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(280.4788) Remote sensing and sensors : Optical sensing and sensors
ToC Category:
Scattering
History
Original Manuscript: September 28, 2009
Revised Manuscript: December 5, 2009
Manuscript Accepted: December 6, 2009
Published: December 17, 2009
Citation
Jon A. Schuller and Mark L. Brongersma, "General properties of dielectric optical antennas," Opt. Express 17, 24084-24095 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-26-24084
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