2012 37th International Conference on Infrared, Millimeter, and Terahertz Waves, 2012
ABSTRACT Results on identification of liquids by a Josephson detector with a dielectric waveguide... more ABSTRACT Results on identification of liquids by a Josephson detector with a dielectric waveguide coupling are presented. Broadband and frequency-selective modes of the Josephson detector were used to extend a spectral bandwidth from 1 GHz to 500 GHz. A characterization of a liquid identifier was demonstrated for alcohols, acetone and water.
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004., 2004
IEEE MTT-S International Microwave Symposium Digest, 2007
ABSTRACT In this paper we present a high performance near-field imaging method suitable for broad... more ABSTRACT In this paper we present a high performance near-field imaging method suitable for broadband applications. Recent advances in preparing micrometer and submicrometer resolution near-field probes are reported, along with examples of applications of this method both for frequency and time domain measurements. For the latter, pulsed terahertz radiation has been used to probe a broadband (300 GHz-2 THz) spectroscopic response of substances with different dielectric properties. For frequency domain measurements a continuous wave 80 GHz radiation has been applied to metallic, semiconducting, ferroelectric and biological objects. Frequency independent high spatial resolution and high sensitivity have been demonstrated for all measurements.
2012 37th International Conference on Infrared, Millimeter, and Terahertz Waves, 2012
ABSTRACT Results on identification of liquids by a Josephson detector with a dielectric waveguide... more ABSTRACT Results on identification of liquids by a Josephson detector with a dielectric waveguide coupling are presented. Broadband and frequency-selective modes of the Josephson detector were used to extend a spectral bandwidth from 1 GHz to 500 GHz. A characterization of a liquid identifier was demonstrated for alcohols, acetone and water.
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004., 2004
IEEE MTT-S International Microwave Symposium Digest, 2007
ABSTRACT In this paper we present a high performance near-field imaging method suitable for broad... more ABSTRACT In this paper we present a high performance near-field imaging method suitable for broadband applications. Recent advances in preparing micrometer and submicrometer resolution near-field probes are reported, along with examples of applications of this method both for frequency and time domain measurements. For the latter, pulsed terahertz radiation has been used to probe a broadband (300 GHz-2 THz) spectroscopic response of substances with different dielectric properties. For frequency domain measurements a continuous wave 80 GHz radiation has been applied to metallic, semiconducting, ferroelectric and biological objects. Frequency independent high spatial resolution and high sensitivity have been demonstrated for all measurements.
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Papers by U. Poppe