Rydberg excitons are, with their ultrastrong mutual interactions, giant optical nonlinearities, and very high sensitivity to external fields, promising for applications in quantum sensing and nonlinear optics at the single-photon level. To design quantum applications it is necessary to know how Rydberg excitons and other excited states relax to lower-lying exciton states. Here, we present photoluminescence excitation spectroscopy as a method to probe transition probabilities from various excitonic states in cuprous oxide. We show giant Rydberg excitons at T=38 mK with principal quantum numbers up to n=30, corresponding to a calculated diameter of 3μm.
CITATION STYLE
Versteegh, M. A. M., Steinhauer, S., Bajo, J., Lettner, T., Soro, A., Romanova, A., … Zwiller, V. (2021). Giant Rydberg excitons in Cu2O probed by photoluminescence excitation spectroscopy. Physical Review B, 104(24). https://doi.org/10.1103/PhysRevB.104.245206
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