期刊
OPTICS EXPRESS
卷 15, 期 26, 页码 18119-18129出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.15.018119
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Surface plasmon polaritons (SPPs) and diffraction effects such as Rayleigh anomalies (RAs) play key roles in the transmission of light through periodic subwavelength hole arrays in metal films. Using a combination of theory and experiment we show how refractive index ( RI) sensitive transmission features arise from hole arrays in thin gold films. We show that large transmission amplitude changes occur over a narrow range of RI values due to coupling between RAs and SPPs on opposite sides of the metal film. Furthermore, we show how to predict, on the basis of a relatively simple analysis, the periodicity and other system parameters that should be used to achieve this RA-SPP effect for any desired RI range. (c) 2007 Optical Society of America.
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