Title

Long-wave infrared surface plasmon grating coupler

Authors

Authors

J. W. Cleary; G. Medhi; R. E. Peale;W. R. Buchwald

Comments

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Abbreviated Journal Title

Appl. Optics

Keywords

DOPED SILICON; ANOMALIES; LIGHT; SILICIDES; Optics

Abstract

We present a simplified analytic formula that may be used to design gratings intended to couple long-wave infrared radiation to surface plasmons. It is based on the theory of Hessel and Oliner (1965). The recipe is semiempirical, in that it requires knowledge of a surface-impedance modulation amplitude, which is found here as a function of the grating groove depth and the wavelength for silver lamellar gratings at CO2 laser wavelengths. The optimum groove depth for photon-to-surface-plasmon energy conversion was found by experiment and calculation to be similar to 10%-15% of the wavelength. This value is about twice what has been reported previously in the visible spectral range for sinusoidal grating profiles. (c) 2010 Optical Society of America

Journal Title

Applied Optics

Volume

49

Issue/Number

16

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

3102

Last Page

3110

WOS Identifier

WOS:000278265600019

ISSN

1559-128X

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