Electric and magnetic dipolar response of germanium nanospheres: Interference effects, scattering anisotropy, and optical forces
Entity
UAM. Departamento de Física de la Materia CondensadaPublisher
Society of Photo-Optical Instrumentation Engineers (SPIE); Elsevier B.V.Date
2011-11-11Citation
10.1117/1.3603941
Journal of Nanophotonics 5.1 (2011): 053512
ISSN
1934-2608 (online)DOI
10.1117/1.3603941Funded by
This work has been supported by the EU NMP3-SL-2008-214107-Nanomagma, the Spanish MICINN Consolider NanoLight (CSD2007-00046), FIS2010-21984, FIS2009- 13430-C01-C02, and FIS2007-60158, as well as by the Comunidad de Madrid Microseres-CM (S2009/TIC-1476). Work by R.G.-M. was supported by the MICINN “Juan de la Cierva” FellowshipProject
Comunidad de Madrid. S2009/TIC-1476/MICROSERES; info:eu-repo/grantAgreement/EC/FP7/214107Editor's Version
http://dx.doi.org/10.1117/1.3603941Subjects
Anisotropic optical materials; Magneto-optical materials; Nanomaterials; Particles; Resonators; Scattering; FísicaNote
Gómez-Medina, Raquel, et al. "Electric and magnetic dipolar response of germanium nanospheres: interference effects, scattering anisotropy, and optical forces", Journal of Nanophotonics, Elsevier B.V., 5 (1), 053512, (2011). Copyright 2013 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibitedRights
© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)Abstract
The coherent combination of electric and magnetic responses is the basis of the electromagnetic behavior of new engineered metamaterials. The basic constituents of their meta-atoms usually have metallic character and consequently high absorption losses. Based on standard "Mie" scattering theory, we found that there is a wide window in the near-infrared (wavelengths 1 to 3 μm), where light scattering by lossless submicrometer Ge spherical particles is fully described by their induced electric and magnetic dipoles. The interference between electric and magnetic dipolar fields is shown to lead to anisotropic angular distributions of scattered intensity, including zero backward and almost zero forward scattered intensities at specific wavelengths, which until recently was theoretically established only for hypothetically postulated magnetodielectric spheres. Although the scattering cross section at zero backward or forward scattering is exactly the same, radiation pressure forces are a factor of 3 higher in the zero forward condition
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Google Scholar:Gómez-Medina, Raquel
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García-Cámara, Braulio
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Suárez-Lacalle, Irene
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González, Francisco
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Moreno, Fernando
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Nieto-Vesperinas, Manuel
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Sáenz Gutiérrez, Juan José
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