High-Speed Y-Ba-Cu-O Direct Detection System for Monitoring Picosecond THz Pulses

• Published in: IEEE transactions on terahertz science and technology 2013-01, Vol.3 (1), p.81-86
• Main Authors: Thoma, P., Scheuring, A., Wunsch, S., Il'in, K., Semenov, A., Hubers, H., Judin, V., Muller, A-S, Smale, N., Adachi, M., Tanaka, S., Kimura, S., Katoh, M., Yamamoto, N., Hosaka, M., Roussel, E., Szwaj, C., Bielawski, S., Siegel, M.
• Format: Article
• Language: English
• Subjects: Coherent synchrotron radiation; Detectors; Educational institutions; high-temperature superconductor {\hbox{YBa}}_{2}{\hbox{Cu}}_{3}{\hbox{O}}_{7-\delta}; Laser beams; Lenses; picosecond THz pulses; Synchrotron radiation; thin-film THz detectors; Yttrium barium copper oxide
• ISSN: 2156-342X; 2156-3446
• DOI: 10.1109/TTHZ.2012.2234209

A high-speed YBa 2 Cu 3 O 7-δ direct detection system was developed to monitor terahertz picosecond pulses in the time domain. High-T C superconducting thin-film YBa 2 Cu 3 O 7-δ microbridges with critical temperatures of T C = 85 K were embedded into a planar log-spiral antenna to couple the broadband terahertz radiation (0.1 -2 THz) of several picosecond pulsed sources. The YBa 2 Cu 3 O 7-δ detectors were installed in a liquid nitrogen cryostat equipped with 18 GHz effective bandwidth readout electronics. THz pulses generated at the electron storage rings ANKA and UVSOR-II have been resolved with a temporal resolution of 30 ps (full width at half maximum) limited by the readout electronics bandwidth. Beam dynamic effects of bursting coherent synchrotron radiation were successfully monitored.