28 April 2017 Terahertz-wave generation using resonant-antenna-integrated uni-traveling-carrier photodiodes
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Abstract
Two types of resonant antennas were integrated with uni-traveling-carrier photodiodes (UTC-PDs) to increase THz-wave output powers. Slot-antenna integrated UTC-PDs exhibited two to three times larger output powers at their peak frequencies than those of a non-resonant bowtie-antenna-integrated device. Output power was enhanced at frequencies from 900 GHz to 1.6 THz for a narrow-slot UTC-PD and from 350 to 850 GHz for a wide-slot UTC-PD. The detected output power was 3.5 μW at 1.25 THz and 28 μW at 700 GHz for a photocurrent of 10 mA with a bias voltage of -0.4 V. A resonant bowtie-antenna, which can be designed by simple analytical calculation, was also integrated with a UTC-PD. The fabricated device exhibited about three times larger output powers at its peak frequency than those of a non-resonant bowtie-antenna-integrated device with an output-power-enhanced frequency range from 400 to 700 GHz.
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Hiroshi Ito, Tadao Ishibashi, "Terahertz-wave generation using resonant-antenna-integrated uni-traveling-carrier photodiodes", Proc. SPIE 10209, Image Sensing Technologies: Materials, Devices, Systems, and Applications IV, 102090R (28 April 2017); doi: 10.1117/12.2262764; https://doi.org/10.1117/12.2262764
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