Understanding fractional-order surface plasmons |
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Authors: | Yang Yuping Grischkowsky Daniel |
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Institution: | School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA. |
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Abstract: | We show experimentally that diffraction-induced surface plasmon excitation can mimic enhanced transmission and cause a highly sensitive modulation by the coherent interference between zero-order and reflected first-order diffraction in select regions of the terahertz spectrum. Based on the study of a one-dimensional metallic grating, we obtain the physical mechanisms of the fractional-order surface plasmon resonances observed with the two-dimensional grating of the metallic hole array. |
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