A system of resonance atoms is placed in a medium with developed polariton effect. In the spectrum of polariton states there can exist a band gap. If an atom with a resonance frequency inside the polariton gap is incorporated into the medium, the atomic spontaneous emission can be strongly suppressed. This is what is called the localization of light. Nevertheless, an ensemble of resonance atoms...

In this review we discuss localization of waves by multiple scattering. In the weak case, also known as coherent backscattering, there is a twofold enhancement of the reflected intensity in the back direction. We discuss the origin of this effect, its shape with reflection angle as well as the influence of finite sample size and absorption on this shape. This discussion of the properties of the...

We describe a fast algorithm to propagate, for any user-specified accuracy, a time-harmonic electromagnetic field between two parallel planes separated by a linear, isotropic and homogeneous medium. The analytical formulation of this problem (ca 1897) requires the evaluation of the so-called Rayleigh-Sommerfeld integral. If the distance between the planes is small, this integral can be accurate...

The radiance structure inside the glass sphere (Figure 1) results from total internal reflection that allows light to reach points that are otherwise in shadow due to refraction perturbing light paths towards the center. The hard boundaries of these structures mark the narrow stripes where light travels around the sphere several times by total internal reflection, after it just managed to enter...

A bstract We present new constraints on three different models, the so-called universal, B ? L and ? ? involving a yet to be observed light vector Z ? mediator, by exploiting recent observation of coherent elastic neutrino-nucleus scattering (CE ? NS) in argon cesium-iodide performed COHERENT Collaboration. compare results obtained from combination above data sets with limits derived searches f...