Robust determination of the anisotropic polarizability of nanoparticles using coherent confocal microscopy
JOSA A, Vol. 25, Issue 8, pp. 2102-2113 (2008)
http://dx.doi.org/10.1364/JOSAA.25.002102
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Abstract
A coherent confocal microscope is proposed as a means to fully characterize the elastic scattering properties of a nanoparticle as a function of wavelength. Using a high numerical aperture lens, two-dimensional scanning, and a simple vector-beam shaper, the rank-2 polarizability tensor is estimated from a single confocal image. A method for computationally efficient data processing is described, and numerical simulations show that this algorithm is robust to noise and uncertainty in the focal plane position. The proposed method is a generalization of techniques that provide an estimate of a limited set of scattering parameters, such as a single orientation angle for rodlike particles. The measurement of the polarizability obviates the need for a priori assumptions about the nanoparticle.
© 2008 Optical Society of America
OCIS Codes
(120.5410) Instrumentation, measurement, and metrology : Polarimetry
(180.3170) Microscopy : Interference microscopy
(290.0290) Scattering : Scattering
(110.1758) Imaging systems : Computational imaging
(100.3200) Image processing : Inverse scattering
ToC Category:
Scattering
History
Original Manuscript: April 9, 2008
Manuscript Accepted: June 8, 2008
Published: July 24, 2008
Virtual Issues
Vol. 3, Iss. 9 Virtual Journal for Biomedical Optics
Citation
Brynmor J. Davis and P. Scott Carney, "Robust determination of the anisotropic polarizability of nanoparticles using coherent confocal microscopy," J. Opt. Soc. Am. A 25, 2102-2113 (2008)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-25-8-2102
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