TY - JOUR
T1 - Generating and Enhancing THz Pulses via an Antenna-Coupled Unitraveling-Carrier Photodiode Array
AU - Che, Ming
AU - Kondo, Kazuya
AU - Kato, Kazutoshi
N1 - Funding Information:
This work was supported in part by the National Institute of Information and Communications Technology (NICT) under Grants 00901 and 02801, in part by theMIC/SCOPE under Grant 195010002, in part by the Collaborative Research Based on Industrial Demand/JST under Grant JPMJSK1513, in part by JSPS KAKENHI under Grants JP20H00253 and JP21K18730, and in part by 2022 Research Start Program 202206, Kyushu University.
Publisher Copyright:
© 2011-2012 IEEE.
PY - 2023/5/1
Y1 - 2023/5/1
N2 - Terahertz (THz) pulses with picosecond-level duration are generated and enhanced by fabricating arrayed InP/InGaAs unitraveling-carrier photodiodes (UTC-PDs) with integrated planar bowtie antennas. We experimentally demonstrated THz pulses generation from an UTC-PD with a duration of 10ps and 25GHz repetition rate. Compared with those of an individual UTC-PD excited at a photocurrent of 3mA and dc bias voltage of -1.5V, the pulsed THz waves generated from three arrayed UTC-PDs exhibited a 7-dB power enhancement gain after optical time alignment through optic-fiber delay lines. Experimental results indicate that this optoelectronic THz pulses generation based on arrayed UTC-PDs can achieve scalable directional gain and low-profile assembly. Enhanced THz pulses generation will be beneficial for the applications of quasi-time-domain THz spectroscope and pulse-based THz communications.
AB - Terahertz (THz) pulses with picosecond-level duration are generated and enhanced by fabricating arrayed InP/InGaAs unitraveling-carrier photodiodes (UTC-PDs) with integrated planar bowtie antennas. We experimentally demonstrated THz pulses generation from an UTC-PD with a duration of 10ps and 25GHz repetition rate. Compared with those of an individual UTC-PD excited at a photocurrent of 3mA and dc bias voltage of -1.5V, the pulsed THz waves generated from three arrayed UTC-PDs exhibited a 7-dB power enhancement gain after optical time alignment through optic-fiber delay lines. Experimental results indicate that this optoelectronic THz pulses generation based on arrayed UTC-PDs can achieve scalable directional gain and low-profile assembly. Enhanced THz pulses generation will be beneficial for the applications of quasi-time-domain THz spectroscope and pulse-based THz communications.
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U2 - 10.1109/TTHZ.2023.3251736
DO - 10.1109/TTHZ.2023.3251736
M3 - Article
AN - SCOPUS:85149483833
SN - 2156-342X
VL - 13
SP - 280
EP - 285
JO - IEEE Transactions on Terahertz Science and Technology
JF - IEEE Transactions on Terahertz Science and Technology
IS - 3
ER -