Electromagnetically induced transparency with Cu${}_2$O excitons in the presence of phonon coupling

Abstract

Highly excited Rydberg states of excitons in Cu${}_2$O semiconductors provide a promising approach to explore and control strong particle interactions in a solid-state environment. A major obstacle has been the substantial absorption background that stems from exciton-phonon coupling and lies under the Rydberg excitation spectrum, weakening the effects of exciton interactions. Here, we demonstrate that two-photon excitation of Rydberg excitons under conditions of electromagnetically induced transparency (EIT) can be used to control this background. Based on a microscopic theory that describes the known single-photon absorption spectrum, we analyze the conditions under which two-photon EIT permits separating the optical Rydberg excitation from the phonon-induced absorption background, and even suppressing it entirely. Our findings thereby pave the way for the exploitation of Rydberg blockade with Cu${}_2$O excitons in nonlinear optics and other applications.

arXiv comment11 pages, 6 figures

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Cited by in corpus (6)

• Giant Rydberg excitons in Cu${}_2$O probed by photoluminescence excitation spectroscopy
• Rydberg Excitons in Synthetic Cuprous Oxide (Cu${}_2$O)
• Microwave-optical coupling via Rydberg excitons in cuprous oxide
• Strong photon interactions from weakly interacting particles
• Quantum light from lossy semiconductor Rydberg excitons
• Nonlinear optical properties and Kerr nonlinearity of Rydberg excitons in Cu${}_2$O quantum wells