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TT: Fachverband Tiefe Temperaturen

TT 78: Quantum Optics at the Nanoscale: From Fundamental Physics to Quantum Technologies (joint session HL, DS, O, and TT, organized by DS)

TT 78.1: Vortrag

Donnerstag, 23. März 2017, 17:00–17:15, CHE 91

Sensing weak radio-frequency radiation by pulsed Autler-Townes spectroscopy — Timo Joas, Andreas M. Waeber, Georg Braunbeck, and •Friedemann Reinhard — TU München, Walter Schottky Institut and Physik-Department

Nano-emitters have shaped a new era of quantum optics, serving as convenient single photon sources, e.g. to launch surface plasmons [1,2] or to build long-distance entanglement [3]. So far, they have mostly been used in the optical (100THz) domain.

Here we employ a nano-emitter and a quantum-optical protocol to detect weak radiation in the radio-frequency (GHz) range. Our scheme is based on Autler-Townes spectroscopy [4]. We extend this technique to a pulsed protocol, which greatly improves spectral resolution, sensitivity and robustness to experimental fluctuations.

We demonstrate our approach on a NV center in diamond, where it might enable various applications. Specifically, we consider radio-astronomy, ultrasound detection and spin-phonon coupling.

[1] A.V. Akimov et al., Nature 450, 402 (2007)

[2] R. Kolesov et al., Nature Physics 5, 470 (2009)

[3] B. Hensen et al., Nature 526, 682 (2015)

[4] J.A. Gordon et al., Appl. Phys. Lett. 105, 024104 (2014)