Anomalous microwave reflection from a metal surface induced by spoof surface plasmon

doi:10.1088/1674-1056/21/1/017301

Abstract The reflection of X-band microwaves (8-12 GHz) from a metallic aluminum (Al) surface with groove grating corrugations was investigated experimentally. It was shown that the reflection of p-polarization is much less than the microwave reflected from the corresponding area of an unruled Al surface, with selective wavelength. The experimental results demonstrated that the anomalous microwave reflection is strongly associated with the excitation of spoof surface plasmons at the Al-air interface by the surface grating coupler. This near-total absence of reflected microwaves is similar to the famous Wood's anomaly in the optical regime and is of fundamental importance to the applications of spoof surface plasmons in the microwave regime.

Keywords: spoof surface plasmons anomalous reflection metal surface

Received: 22 September 2011
Revised: 08 October 2011
Accepted manuscript online:

PACS:	73.20.Mf	(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
	42.25.Gy	(Edge and boundary effects; reflection and refraction)
	78.66.Bz	(Metals and metallic alloys)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2008CB717800) and the Doctoral Program of Ministry of Education of China (Grant No. 20093402110027).

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Wang Liang(王亮), Cao Jin-Xiang(曹金祥), LŰ You(吕铀), Liu Lei(刘磊), Du Yin-Chang(杜寅昌), and Wang Jian(汪建) Anomalous microwave reflection from a metal surface induced by spoof surface plasmon 2012 Chin. Phys. B 21 017301

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Anomalous microwave reflection from a metal surface induced by spoof surface plasmon

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