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Opt Express. 2009 Jun 22;17(13):10800-5.

Optical magnetic plasma in artificial flowers.

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1
IQSL, Hewlett-Packard Research Lab, Palo Alto, CA 94304, USA. jingjingl@hp.com

Abstract

We report the design of an artificial flower-like structure that supports a magnetic plasma in the optical domain. The structure is composed of alternating "petals" of conventional dielectrics (epsilon > 0) and plasmonic materials (Re(epsilon ) < 0). The induced effective magnetic current on such a structure possesses a phase lag with respect to the incident TE-mode magnetic field, similar to the phase lag between the induced electric current and the incident TM-mode electric field on a metal wire. An analogy is thus drawn with an artificial electric plasma composed of metal wires driven by a radio frequency excitation. The effective medium of an array of flowers has a negative permeability within a certain wavelength range, thus behaving as a magnetic plasma.

PMID:
19550479
[Indexed for MEDLINE]
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