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Hybrid metamaterials enable fast electrical modulation of freely propagating terahertz waves
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10.1063/1.2978071
/content/aip/journal/apl/93/9/10.1063/1.2978071
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/9/10.1063/1.2978071
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Figures

Image of FIG. 1.
FIG. 1.

Schematic of hybrid metamaterials used as electrically driven terahertz modulators. (a) A metamaterial design (device A) having a very large Schottky electrical pad, a surrounding Ohmic contact, and a regular lattice parameter. (b) A second design (device B) with significantly smaller Schottky electrical pad, an interdigitated Ohmic contact, a larger lattice parameter, and an overall smaller active area.

Image of FIG. 2.
FIG. 2.

Time-domain measurements of terahertz modulation signal when applying an ac voltage alternating between 0 and (a) to device A and (b) to the photoconductive terahertz transmitter, at frequencies of 1 and , respectively.

Image of FIG. 3.
FIG. 3.

Terahertz modulation signals of device A as a function of the modulation frequency when loaded with various external series resistors. The solid curves are fits to the experimental data.

Image of FIG. 4.
FIG. 4.

Terahertz modulation signals of device B as a function of the modulation frequency when loaded with 0 and external series resistors. The solid curves are fits to the experimental data.

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/content/aip/journal/apl/93/9/10.1063/1.2978071
2008-09-04
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Hybrid metamaterials enable fast electrical modulation of freely propagating terahertz waves
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/9/10.1063/1.2978071
10.1063/1.2978071
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