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Continuous terahertz-wave generation using a monolithically integrated horn antenna
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View: Figures


Image of FIG. 1.
FIG. 1.

Scanning electron microscope picture of the TEM-HA. In the inset is shown the interdigitated photodetector integrated in the CPW and the feed point of the antenna.

Image of FIG. 2.
FIG. 2.

Experimental configuration of the cw-terahertz photomixing source: , half-wave plate; P, polarizer.

Image of FIG. 3.
FIG. 3.

Frequency dependence of the terahertz power for (circle) and (square), bias . Inset: photocurrent (circle) and terahertz power (square) as function of bias voltage at 779 GHz.

Image of FIG. 4.
FIG. 4.

Simulated isotropic gain of the TEM-HA in the plane. is the angle formed by the direction of the maximum gain and the ground plane. (a) , . (b) , . (c) , . (d) 3D view of the isotropic gain at .

Image of FIG. 5.
FIG. 5.

Electromagnetic simulation of the coupling efficiency between a local voltage source and the even CPW mode for the tested dimensions (square) and for a down scaling of the dimensions by a factor of 2 (circle). In the inset is shown a schematic view of the terahertz current density in the photodetector vicinity.


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Scitation: Continuous terahertz-wave generation using a monolithically integrated horn antenna