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Resonant slot‐antenna‐integrated uni‐travelling‐carrier photodiodes were developed for enhancing terahertz (THz)‐wave output powers while maintaining relatively broad bandwidths. Their output powers were two to three times larger at their peaks than those of a non‐resonant bowtie‐antenna‐integrated device. The output powers were enhanced at frequencies from 900 GHz to 1.6 THz for a narrow‐slot device and from 350 to 850 GHz for a wide‐slot device. Typical output powers were 3.5 μW at 1.25 THz and 28 μW at 700 GHz for a photocurrent of 10 mA with a bias voltage of only −0.4 V.
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Itô et al. (2015) studied this question.
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