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Strong quantum interaction between excitons bound by cavity photon exchange

Anonymous, Cristiano Ciuti

We theoretically predict the interaction between polaritonic excitations arising from the coupling of a cavity photon mode with bound to continuum intersubband transitions in a doped quantum well. The resulting exciton bound by photon exchange, recently demonstrated experimentally, exhibits a binding energy that can be continuously tuned by varying the cavity frequency. We show that polariton-polariton interactions, originating from both Coulomb interactions and Pauli blocking, can be dramatically enhanced by reducing the exciton binding energy, thereby increasing the effective Bohr radius along the growth direction. This regime is reminiscent of Rydberg atoms, where weak binding leads to strong quantum interactions. Our predictions indicate that this physics can give rise to giant quantum optical nonlinearities in the mid and far infrared, a spectral region that remains largely unexplored in quantum optics and offers exciting opportunities for both fundamental studies and applications.We theoretically predict the interaction between polaritonic excitations arising from the coupling of a cavity photon mode with bound to continuum intersubband transitions in a doped quantum well. The resulting exciton bound by photon exchange, recently demonstrated experimentally, exhibits a binding energy that can be continuously tuned by varying the cavity frequency. We show that polariton-polariton interactions, originating from both Coulomb interactions and Pauli blocking, can be dramatically enhanced by reducing the exciton binding energy, thereby increasing the effective Bohr radius along the growth direction. This regime is reminiscent of Rydberg atoms, where weak binding leads to strong quantum interactions. Our predictions indicate that this physics can give rise to giant quantum optical nonlinearities in the mid and far infrared, a spectral region that remains largely unexplored in quantum optics and offers exciting opportunities for both fundamental studies and applications.

arXiv:2510.24421Physical review. B./Physical review. BAug 3, 20260 citations

Optical Properties of Excitons in Semiconductor Quantum Wells and Microcavities

Lucio Claudio Andreani

EPIOPTICS Workshop on Optical Probes of Surfaces and Interfaces (EPIOPTICS)Nov 1, 20010 citations

Long-distance coupling and energy transfer between exciton states in magnetically controlled microcavities

Maciej Ściesiek, Krzysztof Sawicki, W. Pacuski +4 more

Abstract Coupling of quantum emitters in a semiconductor relies, generally, on short-range dipole-dipole or electronic exchange type interactions. Consistently, energy transfer between exciton states, that is, electron-hole pairs bound by Coulomb interaction, is limited to distances of the order of 10 nm. Here, we demonstrate polariton-mediated coupling and energy transfer between excitonic states over a distance exceeding 2 μm. We accomplish this by coupling quantum well-confined excitons through the delocalized mode of two coupled optical microcavities. Use of magnetically doped quantum wells enables us to tune the confined exciton energy by the magnetic field and in this way to control the spatial direction of the transfer. Such controlled, long-distance interaction between coherently coupled quantum emitters opens possibilities of a scalable implementation of quantum networks and quantum simulators based on solid-state, multi-cavity systems.Abstract Coupling of quantum emitters in a semiconductor relies, generally, on short-range dipole-dipole or electronic exchange type interactions. Consistently, energy transfer between exciton states, that is, electron-hole pairs bound by Coulomb interaction, is limited to distances of the order of 10 nm. Here, we demonstrate polariton-mediated coupling and energy transfer between excitonic states over a distance exceeding 2 μm. We accomplish this by coupling quantum well-confined excitons through the delocalized mode of two coupled optical microcavities. Use of magnetically doped quantum wells enables us to tune the confined exciton energy by the magnetic field and in this way to control the spatial direction of the transfer. Such controlled, long-distance interaction between coherently coupled quantum emitters opens possibilities of a scalable implementation of quantum networks and quantum simulators based on solid-state, multi-cavity systems.

arXiv:2009.08554Communications MaterialsOct 30, 202023 citations

Exciton-exciton interaction in GaAs/AlGaAs quantum wells under intense optical excitation

N. G. Yaremenko, Galib Barievich Galiev, М. В. Карачевцева +2 more

Doklady PhysicsAug 1, 20061 citation

Oservation of bound excitons stabilised by the interaction with a photonic resonator

Cortese E., Tran N. L., Jean‐Michel Manceau +5 more

We demonstrate that, in cavity-embedded doped quantum wells, strong light-matter interaction can create a bound excitonic state. Such a cavity-stabilised state is spectroscopically observed as a discrete resonance below the ionisation threshold.

Jan 1, 20210 citations

Exciton absorption of entangled photons in semiconductor quantum wells

Ferney J. Rodríguez, David Guzmán, Luis Eduardo Martínez Salazar +1 more

Bulletin of the American Physical SocietyMar 22, 20130 citations

Cavity-mediated bound excitons

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Cavity-mediated bound excitons

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