Excitons and cavity polaritons for ultracold atoms in an optical lattice

Journal Article · Sun Jul 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.013817· OSTI ID:21011313

Zoubi, Hashem; Ritsch, Helmut ^[1]

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1. Institut fur Theoretische Physik, Universitat Innsbruck, Technikerstrasse 25, A-6020 Innsbruck (Austria)

We study the resonant electronic excitation dynamics for ultracold atoms trapped in a deep optical lattice prepared in a Mott-insulator state. Excitons in these artificial crystals are similar to Frenkel excitons in noble atom or molecular crystals. They appear when the atomic excited state linewidth is smaller than the exciton bandwidth generated by dipole-dipole coupling. When the atoms are placed within a cavity the electronic excitations and the quantized cavity mode get coupled. In the collective strong coupling regime excitations form two branches of cavity polaritons with Rabi splitting larger than the atomic and the cavity linewidth. To demonstrate their properties we calculate the transmission, reflection, and absorption spectra for an incident weak probe field, which show resonances at the polariton frequencies.

• OSTI ID: 21011313
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
ATOMS
CAVITIES
COUPLING
DIPOLES
EXCITATION
EXCITED STATES
EXCITONS
MOLECULAR CRYSTALS
OPTICAL MODELS
POLARONS
PROBES
REFLECTION
RESONANCE
STRONG-COUPLING MODEL
TEMPERATURE RANGE 0000-0013 K
TRANSMISSION
TRAPPING