Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 26: Quantum Optics IV

Q 26.2: Vortrag

Dienstag, 1. März 2016, 14:45–15:00, f442

Squeezed Light from Entangled Nonidentical Emitters via Nanostructured Environments — Harald R. Haakh and •Diego Martin-Cano — Nano-Optics Division, Max Planck Institute for the Science of Light, Erlangen, Germany.

Most sources of squeezed light are based on large systems, such as nonlinear crystals or atomic vapors. Recent experiments [1,2] have proven quadrature squeezing in scattered resonance fluorescence from a single emitter, a long-standing prediction in quantum optics [3]. To assist the weak signals in such challenging measurements and to push the limits of their generation, we have recently researched the ability of nanostructures to create squeezed light from a single two-level emitter [4]. Here we present a step forward by studying nonclassical properties in collective resonance fluorescence aided by nanostructures [5]. The broadband character of the nano-architecture allows for an enhanced two-photon nonlinearity that generates squeezed light from two far-detuned quantum emitters. Our approach permits to overcome the intrinsic limitations from noninteracting single emitters and is more robust against phase decoherence induced by the environment. More generally, we show that the reduced light fluctuations arising from the interaction between the emitters provide a means to detect their entanglement. References: [1] C. Schulte et al., Nature 525, 222 (2015). [2] A. Ourjoumtsev et al, Nature 474, 623 (2011) [3] D. Walls and P. Zoller, PRL 47, 709 (1981). [4] D. Martin-Cano et al, PRL 113, 263605 (2014). [5] H. Haakh and D. Martin-Cano, ACS Phot, DOI:10.1021/acsphotonics.5b00585.