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Terahertz nanoresonators: Giant field enhancement and ultrabroadband performance
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Schematic of an array of rectangular holes with the length , the width , , and the periods in x and y directions, respectively, the thickness of metal film deposited on Si substrate. (b) THz nanoresonators are fabricated by electron beam lithography using negative type of photoresist patterning. (c) Our experimental setup: THz time domain spectroscopy.

Image of FIG. 2.
FIG. 2.

(a) Normalized transmitted amplitude spectra measured through an array of nanoresonators with a length , a width , and periods and (b) The same as (a) except . SEM images of the samples are shown in the insets. (c) A modal expansion based theoretical calculations with the period , and (d) .

Image of FIG. 3.
FIG. 3.

(a) Schematic of log-periodic THz nanoresonators with four different lengths (, , , and ), three different spacings (, , and ), and the same width . (b) SEM images of the two samples with different periods: (, , and ) (top) and (, , and ) (bottom). Solid line boxes denote a unit cell in each structure. (c) Normalized amplitude spectra measured through the two samples with different periods of (dashed line) and (solid line) in the range between 0.2 and 2.0 THz.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Terahertz nanoresonators: Giant field enhancement and ultrabroadband performance