title: Understanding fractional-order surface plasmons.
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.
authors: School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
authors: Yuping
authors: Y
authors: Yang
authors: Daniel
authors: D
authors: Grischkowsky