Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.54: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal
Infrared streak cameras: Overcoming low SNR by up-conversion — •Markus Allgaier1, Vahid Ansari1, Christof Eigner1, Viktor Quiring1, Raimund Ricken1, John Matthew Donohue1, Thomas Czerniuk2, Marc Aßmann2, Manfred Bayer2, Benjamin Brecht3,1, and Christine Silberhorn1 — 1Integrated Quantum Optics, Applied Physics, University of Paderborn, 33098 Paderborn, Germany — 2Experimentelle Physik II, Technische Universität Dortmund, 44221 Dortmund, Germany — 3Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
Streak cameras are the standard tool for studying semiconductor emission in the time domain, especially for picosecond time scales. While high performance on the single-photon level has been shown for visible wavelengths, sensitivity and noise performance for the infrared range is limited. We study noise sources and quantum efficiency in commercially available streak cameras, and show that the limitations in the infrared and particularly the telecom range can be overcome using an upconversion scheme. We experimentally demonstrate single-photon sensitivity in the telecom band using an engineered sum-frequency generation process in periodically poled Titanium-indiffused waveguides in Lithium Niobate, achieving picosecond resolution. Single-photon sensitivity is verified using a parametric downconversion (PDC) source with a known average photon number of 0.2.