Coherence and Quantum Optics IX

M. Nevière, E. Popov, R. Reinisch +1 more

Kerr-type leaky resonators are distributed couplers. They can be prism or \ngrating couplers, Fabry-Pérot's or multilayer devices all which include a nonlinear \nmedium that exhibits the optical Kerr effect [IX. 1 and IX.2]. One of the key features of \nthe optical Kerr effect is that it gives rise to a light-intensity dependent refractive index, \nallowing in this way to control light with light [IX.3]. This constitutes a fascinating field \nof nonlinear optics. The resulting all-optical interactions lead to numerous manifestations \nranging from optical bistability to "exotic" behavior such as self-pulsing, chaos, strange \npattern, light bullets, etc. The first observations of optical bistability date back to the \n1970s [ІХ.4-ІХ.7]. A proper study of these effects requires the development of a spatiotemporal theory of the optical Kerr effect in leaky resonators [IX.8].

Joseph H. Eberly, L. Mandeļ, E. Wolf

V. V. Krivolapchuk, Moskalenko, E. S., Alexander L. Zhmodikov +2 more

The present report studies the IX line shape in photoluminescence (PL) spectra originating from the DQW of GaAs depending on the electric field value applied to the structure. We observe unusual IX line shape behaviour in the definite range of bath temperatures and pumping intensities and discuss our results in terms of possible revealing of the collective excitations in a dense IX gas which were previoulsly predicted.

Joseph H. Eberly, L. Mandeļ, E. Wolf

Collective

Xiao‐Qing Luo, Zeng-Zhao Li, Tiefu Li +2 more

Kerr-nonlinearity induced self-focusing or self-defocusing effect provides the opportunity for exploring fundamental phenomena related to the light-matter interactions. Here we show that the linear and nonlinear dispersion responses are significantly sensitive to both the detunings and the tunneling strengths of the indirect-excitonic (IX) states in an asymmetric triple quantum dot system. In particular, the nonlinear dispersion properties are dominated by the tunnel-enhanced cross-Kerr nonlinearity from one of the IX states. Meanwhile, by varying the detunings of other IX states, we reveal that the tunnel-enhanced cross-Kerr nonlinearity gives rise to the realization of the self-focusing and self-defocusing effects. Moreover, by taking into account the effect of the longitudinal-acoustic-phonon induced dephasing of the IX states, it is possible to modulate the height and position of the peak of the self-focusing or self-defocusing effect. Our results may have potential applications in nonlinear-optics and quantum-optics devices based on the tunnel-enhanced nonlinearities in this solid-state system.