SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 39: Quantum Optics & Nano-Optics

Q 39.6: Vortrag

Mittwoch, 8. März 2023, 15:45–16:00, F342

Quantum light source based on two-photon interferences — •Martin Cordier, Max Schemmer, Philipp Schneeweiss, Jürgen Volz, and Arno Rauschenbeutel — Department of Physics, Humboldt-Universität zu Berlin, 10099 Berlin, Germany

The transmission of coherent light through an optically dense ensemble has wide applications ranging from biology to chemical spectroscopy. Since the 18th century it has been commonly described by Beer-Lambert's law. Recently, it has been shown that, the light transmitted through an ensemble of two-level emitters is violated due to incoherent scattering at the single emitter level [1]. Here, building on the work of [2,3], we realize an interferometer that allows us to tune the quantum phase between the transmitted coherent and incoherent light fields. By tuning this phase we show interference fringes in the photon coincidence rate. Beyond clarifying the fundamental nature of what is commonly termed incoherently scattered light, our study lends itself to developing applications in quantum technologies, such as novel quantum light sources.

[1] Veyron et al., Phys. Rev. Research 4, 033033 (2022).

[2] Mahmoodian, et al., Physical Review Letters 121, 143601 (2018).

[3] Prasad et al., Nature Photonics 1 (2020).