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.


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    Title :

    Measurement of free-space THz pulses via long-lifetime photoconductors


    Contributors:
    Sun, F.G. (author) / Wagoner, G.A. (author) / Bentz, D. (author) / Zhang, X.-C. (author)


    Publication date :

    1995-01-01


    Size :

    174493 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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