Two-photon Rabi splitting and optical Stark effect in semiconductor microcavities
Year: 1999
Authors: Carusotto I., La Rocca G.C.
Autors Affiliation: Scuola Normale Super Pisa, INFM, I-56126 Pisa, Italy; Univ Salerno, Dipartimento Fis, I-84081 Baronissi, SA, Italy.
Abstract: We have studied two-photon nonlinear optical effects arising in a microcavity geometry from resonant two-photon absorption or second-harmonic generation. The transmission spectrum of the cavity is shown to depend on light intensity according to a simple two-level picture with an intensity-dependent coupling: at resonance the system exhibits a two-photon Rabi splitting. The absorption spectrum of a weak probe beam in a pumped cavity is found to strongly depend on pump intensity and detuning; the resulting effect is a sort of two-photon analogue of the usual optical Stark effect. For moderate pump intensities a two-level picture with a pump-dependent coupling can account for the main results, while at higher intensities new unexpected features show up; in particular, we predict the appearance of gain in well-determined spectral regions due to hyper-Raman processes. Finally, we have shown how the coupling coefficients appearing in our formalism can be obtained from a detailed knowledge of the material and geometrical properties of a specific system. For illustrative purposes, we have estimated the required light intensities using realistic data for a GaAs-based semiconductor microcavity. [S0163-1829(99)00932-7].
Journal/Review: PHYSICAL REVIEW B
Volume: 60 (7) Pages from: 4907 to: 4919
KeyWords: Sub-2nd Harmonic-generation; Quantum-well Structures; 2nd-harmonic Generation; 2-photon Absorption; Nonequilibrium Transitions; Nonlinear Optics; Raman-scattering; Room-temperature; Sum-rules; Band-gapDOI: 10.1103/PhysRevB.60.4907Citations: 23data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)