Negative scattering asymmetry parameter for dipolar particles: Unusual reduction of the transport mean free path and radiation pressure
Entity
UAM. Departamento de Física de la Materia CondensadaPublisher
American Physical SocietyDate
2012-03-26Citation
10.1103/PhysRevA.85.035802
Physics review A 85.3 (2012): 035802
ISSN
1050-2947 (print); 1094-1622 (online)DOI
10.1103/PhysRevA.85.035802Funded by
This work was supported by the Spanish MEC through Grants No. FIS2009-13430-C01-C02 and No. CSD2007- 00046 (Consolider NanoLight) and by the Comunidad de Madrid Microseres Project No. S2009/TIC-1476. M.Y. thanks the Mexican Consejo Nacional de Ciencia y Tecnología for a postdoctoral grant (No. 000000000162768). F.S. acknowledges financial support by the Swiss National Science Foundation (Project No. 132736) and the Adolphe Merkle FoundationProject
Gobierno de España. FIS2009-13430-C01-C02; Gobierno de España. CSD2007- 00046; Comunidad de Madrid. S2009/TIC-1476/MicroseresEditor's Version
http://dx.doi.org/10.1103/PhysRevA.85.035802Subjects
FísicaRights
© 2012 American Physical SocietyAbstract
Lossless dielectric nanospheres (made of nonmagnetic materials) with relatively low refraction index may present strong electric and magnetic dipolar resonances. We establish a relationship between the optical force from a plane wave on small electric and magnetic dipolar particles, the transport cross section, and the scattering asymmetry parameter g. In this way we predict negative g (that minimize the transport mean free path below values of the scattering mean free path) for a dilute suspension of both perfectly reflecting spheres as well as of lossless dielectric nanospheres made of moderate permittivity materials, e.g., silicon or germanium nanospheres in the infrared region. Lossless dielectric Mie spheres of relatively low refraction index (as low as 2.2) are shown to present negative g in specific spectral ranges
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Google Scholar:Gómez-Medina, R.
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Froufe-Pérez, Luis S.
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Yépez, M.
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Scheffold, F.
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Nieto-Vesperinas, Manuel
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Sáenz Gutiérrez, Juan José
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