Local field of Poynting vector around a small particle

The field lines of Poynting vector around a small particle are investigated on the basis of classical Mie theory [G. Mie, (1908)]. A particle can effectively absorb incident energy from its surrounding regions, resulting in a great increasing in its optical absorption cross-section, which could be m...

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Bibliographic Details
Main Authors: Wang, Z.B., Luk'yanchuk, B.S., Hong, M.H., Lin, Y., Chong, T.C.
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Aluminum
Data engineering
Laboratories
Laser theory
Light scattering
Magnetic memory
Mie scattering
Optical scattering
Particle scattering
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Summary:The field lines of Poynting vector around a small particle are investigated on the basis of classical Mie theory [G. Mie, (1908)]. A particle can effectively absorb incident energy from its surrounding regions, resulting in a great increasing in its optical absorption cross-section, which could be much greater than its geometrical cross-section. In general, the absorbed energy flows into the particle through some limited portion of its surface instead of the whole surface. For small /spl epsiv/" particle, the excited particle would release energy by dipole radiation but this radiation is confined in a small region near to the particle. Our simulation also reveals the generation of the "optical vortex" around the particle, as that could be used for a new principle of magnetic storage.
DOI:10.1109/CLEOPR.2003.1274574