We present the ultrafast measurement and analysis of sub-picosecond freespace THz pulses using long lifetime (=1 ns) photoconducting antennas. We then directly correlate these results with those obtained using typical ultrashort lifetime photoconducting antennas. At low optical gating intensities GaAs based antennas exhibit a higher responsivity and signal-to-noise ratio than typical antennas based on radiation-damaged silicon-on-sapphire. Our power scaling results indicate the potential use of these devices with amplified optical pulses, large-aperture detectors, and THz antenna array.
Measurement of free-space THz pulses via long-lifetime photoconductors
1995-01-01
174493 byte
Conference paper
Electronic Resource
English
Measurement of Free-Space THz Pulses via Long-Lifetime Photoconductors
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