Giant Rydberg Excitons in Cuprous Oxide

Abstract

Highly excited atoms with an electron moved into a level with large principal quantum number are fascinating hydrogen-like objects. The giant extension of these Rydberg atoms leads to huge interaction effects. Monitoring these interactions has provided novel insights into molecular and condensed matter physics problems on a single quantum level. Excitons, the fundamental optical excitations in semiconductors consisting of a negatively charged electron and a positively charged hole, are the condensed matter analogues of hydrogen. Highly excited excitons with extensions similar to Rydberg atoms are attractive because they may be placed and moved in a crystal with high precision using microscopic potential landscapes. Their interaction may allow formation of ordered exciton phases or sensing of elementary excitations in the surrounding, also on a quantum level. Here we demonstrate the existence of Rydberg excitons in cuprous oxide, Cu2O, with principal quantum numbers as large as n=25 . These states have giant wave function extensions of more than 2 micrometers, compared to about a nanometer for the ground state. The strong dipole-dipole interaction is evidenced by a blockade effect, where the presence of an exciton prevents excitation of a further exciton in its vicinity.

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Cited by in corpus (36)

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• High resolution nanosecond spectroscopy of even-parity Rydberg excitons in Cu${}_2$O
• $K$ dependent exchange interaction of the $1S$ ortho exciton in Cu${}_2$O
• Exchange interaction in the yellow exciton series of cuprous oxide
• Crossover between the Gaussian orthogonal ensemble, the Gaussian unitary ensemble, and Poissonian statistics
• Hot Polarons with Trapped Excitons and Octahedra-Twist Phonons in CH3NH3PbBr3 Hybrid Perovskite Nanowires
• Lattice dynamics and electronic transitions in a structurally-complex layered copper borate Cu${}_3$(BO${}_3$)${}_2$
• Copper plasmonics with excitons
• Exciton mass and exciton spectrum in the cuprous oxide
• Rydberg excitons in electric and magnetic fields obtained with the complex-coordinate-rotation method
• Exciton-phonon interaction breaking all antiunitary symmetries in external magnetic fields
• Van der Waals interaction potential between Rydberg atoms near surfaces
• Multicomponent exciton gas in cuprous oxide: cooling behaviour and the role of Auger decay
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• Classical and semiclassical description of Rydberg excitons in cuprous oxide
• Interseries dipole transitions from yellow to green excitons in cuprous oxide
• Signatures of exciton orbits in quantum mechanical recurrence spectra of Cu${}_2$O
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