92 citations · 620 across the 21 of their papers we have counts for
5 papers · 1 filter
Quantum light from lossy semiconductor Rydberg excitons
Valentin Walther, Anders S. Sørensen
The emergence of photonic quantum correlations is typically associated with emitters strongly coupled to a photonic mode. Here, we show that semiconductor Rydberg excitons, which a…
Microwave-optical coupling via Rydberg excitons in cuprous oxide
Liam A. P. Gallagher, Joshua P. Rogers, Jon D. Pritchett +9
We report exciton-mediated coupling between microwave and optical fields in cuprous oxide (CuO) at low temperatures. Rydberg excitonic states with principal quantum number up t…
Nonclassical Light from Exciton Interactions in a Two-Dimensional Quantum Mirror
Valentin Walther, Lida Zhang, Susanne F. Yelin +1
Excitons in a semiconductor monolayer form a collective resonance that can reflect resonant light with extraordinarily high efficiency. Here, we investigate the nonlinear optical p…
Asymmetric Rydberg blockade of giant excitons in Cuprous Oxide
Julian Heckötter, Valentin Walther, Stefan Scheel +3
The ability to generate and control strong long-range interactions via highly excited electronic states has been the foundation for recent breakthroughs in a host of areas, from at…
Plasma-enhanced interaction and optical nonlinearities of CuO Rydberg excitons
Valentin Walther, Thomas Pohl
We theoretically investigate the nonlinear optical transmission through a cuprous oxide crystal for wavelengths that cover the series of highly excited excitons, observed in recent…