Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 63: Poster Session: Cryogenic Particle Detectors and Cryotechnique
TT 63.13: Poster
Donnerstag, 4. April 2019, 15:00–18:30, Poster D
Towards an opto-electronical setup for milli-Kelvin temperature experiments on single quantum emitters — •Marcel Schrodin1, Philip Schneider1, Christoph Sürgers1, and Wolfgang Wernsdorfer1,2,3 — 1Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany — 2Institut Néel, CNRS and Université Joseph Fourier, Grenoble, France — 3Institute for Nanotechnology, Karlsruhe Institute of Technology
In recent years, different kinds of single-photon sources such as color centers in diamond, single molecules, and quantum dots became the focus of attention in the wide filed of quantum technology. Many experiments already exploit the single emitter characteristics in ambient conditions. However, a comprehensive investigation of single-photon sources and an integration in quantum devices still requires cryogenic temperatures.
We want to present the design of a scanning confocal microscope for fluorescence spectroscopy of single-photon sources at mK temperatures and will show first proof-of-principle results. The optical design is based on a high-NA objective and an optical fiber which guides both the excitation and response of the sample. On-axis scanning of the sample is provided by an xyz-positioning setup. For cryogenic operation, these parts are put into a home-built table-top dilution refrigerator with 20 mK base temperature. Special care has been taken to minimize the vibrations present in the proximity of the sample.