Near the threshold for electromagnetically induced transparency (EIT) or coherent
population trap** (CPT), two-photon-resonance-enhanced self-focusing of a Λ system can …

Light propagation is discussed in media with a cross coupling of the electric and magnetic
component of an applied probe field. We derive the wave equations for a probe pulse …

Nonlinear effects in pulse propagation through a medium consisting of four-level double-Λ-
type systems are studied theoretically. We apply three continuous-wave driving fields and a …

We study four-wave mixing in a double-Λ system, for cw laser beams whose transverse
intensity profiles (TIP's) are initially Gaussian, by solving the Maxwell-Bloch equations …

The realization of negative refraction in atomic gases requires a strong magnetic response
of the atoms. Current proposals for such systems achieve a parametric enhancement of the …

We extend the study on a four-wave mixing (FWM) scheme of contiuous-wave lasers in a hot
rubidium vapor when the probe and coupling fields work in the electromagnetically induced …

We present a theoretical study of multiwave mixing in a driven superconducting quantum
qubit (artificial atom) with a cyclic Ξ-type three-level structure. We first show that three-wave …

Building a refrigerator based on the conversion of heat into optical energy is an ongoing
engineering challenge. Under well-defined conditions, spontaneous anti-Stokes …

Continuous wave hyper-Raman (HR) generation in a ring cavity on the 6s→ 4p transition at
1640 nm in sodium is realized for the first time by two-photon excitation of atomic sodium on …

Kontinuierliche, kohärente Strahlung bei der 1S-2P-Übergangsfrequenz des
Wasserstoffatoms, kurz Lyman-alpha, wird eine Schlüsselrolle bei Experimenten mit …