Optical magnetic plasma in artificial flowers.
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.
Li
Jingjing
J
IQSL, Hewlett-Packard Research Lab, Palo Alto, CA 94304, USA. jingjingl@hp.com
Thylen
Lars
L
Bratkovsky
Alexander
A
Wang
Shiy-Yuan
SY
Williams
R Stanley
RS
D003198:Computer Simulation; D004553:Electric Conductivity; D004574:Electromagnetic Fields; D035264:Flowers / Q000502:physiology*; D008280:Magnetics; D008422:Materials Testing; D008670:Metals; D015233:Models, Statistical; D055095:Optics and Photonics; D011846:Radio Waves; D012031:Refractometry / Q000379:methods
D008670:Metals