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10 March 2020 High-dynamic-range time-domain terahertz spectroscopy system operating at 1 μm optical wavelength (Conference Presentation)
Deniz Turan, Nezih Tolga Yardimci, Mona Jarrahi
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Proceedings Volume 11279, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIII; 112790W (2020) https://doi.org/10.1117/12.2547034
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
We demonstrate a high dynamic range, broadband THz-TDS system that is compatible with 1 μm femtosecond lasers. In order to improve the dynamic range and bandwidth, we designed and fabricated photoconductive terahertz sources and detectors equipped with arrays of plasmonic nano-antennas fabricated on an epitaxially-grown In0.24Ga0.76As substrate. Plasmonic nano-antennas concentrate the photo-generated carriers close to the antenna-photoconductor interface. This ensures a superior performance both in terahertz generation and detection by increasing the induced ultrafast current at the antenna terminals. We demonstrate a THz-TDS system with more than a 100 dB dynamic range and a 4 THz bandwidth.
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Deniz Turan, Nezih Tolga Yardimci, and Mona Jarrahi "High-dynamic-range time-domain terahertz spectroscopy system operating at 1 μm optical wavelength (Conference Presentation)", Proc. SPIE 11279, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIII, 112790W (10 March 2020); https://doi.org/10.1117/12.2547034
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KEYWORDS
High dynamic range imaging
Terahertz spectroscopy
Femtosecond phenomena
Terahertz sources
Antennas
Fiber lasers
Millimeter wave sensors
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