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(Color online) (a) Measured transmitted terahertz pulses through the reference and the hole array. Inset: a scanning electron microscopy image of the array. (b) Measured (open circles) and the Fano fit (solid curve) of transmittance. The fitting parameters are , , , and for the mode. Inset: corresponding data of phase change.
(Color online) (a) Measured absolute transmittance of the hole arrays with fixed hole length of and various hole widths. For clarity, the curves are vertically displaced by 0.36. (b) Absolute (squares) and normalized (circles) peak transmittance as a function of hole width. The solid lines are guides for the eye.
(Color online) Angle-dependent amplitude transmission for arrays with hole dimensions of (a) and (b) . The open circles represent the peak frequencies of the Al–Si SP modes and nonresonant transmission.
Calculated coupling coefficient of the Al–Si SP modes with non-resonant transmission for different hole widths at normal incidence. The dotted line is a guide for the eye.
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