Coherent terahertz radiation detection: Direct comparison between free-space electro-optic sampling and antenna detection
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چکیده
We compare the use of free-space electro-optic sampling ~FSEOS! with photoconducting antennas to detect terahertz ~THz! radiation in the range of 0.1–3 THz. For the same average THz power and low-frequency modulation, signal-to-noise ratio and sensitivity are better with antenna detection at frequencies smaller than 3 THz. When the modulation frequency is increased to more than 1 MHz in FSEOS, both detection schemes have comparable performance. Using a singular-electric-field THz emitter, we demonstrate the feasibility of a THz imaging system using real-time delay scanning in FSEOS and only 20 mW of laser power. @S0003-6951~98!03930-8#
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تاریخ انتشار 1998