Regensburg 2019 – wissenschaftliches Programm
HL 45.31: Poster
Donnerstag, 4. April 2019, 18:30–21:00, Poster E
Optical amplification of spin noise spectroscopy via homodyne detection — •Pavel Sterin, Julia Wiegand, Jens Hübner, and Michael Oestreich — Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstr. 2, D-30167 Hannover, Germany
Spin noise (SN) spectroscopy measurements on delicate semiconductor spin systems, like single InGaAs quantum dots, are currently limited by electrical noise of the detection system rather than by optical shot noise. Here, we report a realization of homodyne SN spectroscopy enabling shot noise limited SN measurements. The proof-of-principle measurements on impurities in an isotopically enriched rubidium atom vapor show that homodyne SN spectroscopy can be utilized even in the low frequency spectrum which facilitates advanced semiconductor spin research like higher order SN measurements on spin qubits.