Localization-induced coherent backscattering effect in wave dynamics.
نویسندگان
چکیده
We investigate the statistics of single-mode delay times of waves reflected from a disordered waveguide in the presence of wave localization. The distribution of delay times is qualitatively different from the distribution in the diffusive regime, and sensitive to coherent backscattering: The probability of finding small delay times is enhanced by a factor close to sqrt[2] for reflection angles near the angle of incidence. This dynamic effect of coherent backscattering disappears in the diffusive regime.
منابع مشابه
Coherent forward scattering peak induced by Anderson localization.
Numerical simulations show that, at the onset of Anderson localization, the momentum distribution of a coherent wave packet launched inside a random potential exhibits, in the forward direction, a novel interference peak that complements the coherent backscattering peak. An explanation of this phenomenon in terms of maximally crossed diagrams predicts that the signal emerges around the localiza...
متن کاملDynamics of Localization in a Waveguide
This is a review of the dynamics of wave propagation through a disordered N-mode waveguide in the localized regime. The basic quantities considered are the Wigner-Smith and single-mode delay times, plus the time-dependent power spectrum of a reflected pulse. The long-time dynamics is dominated by resonant transmission over length scales much larger than the localization length. The correspondin...
متن کاملCoherent Backscattering and Anderson Localization of Light
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...
متن کاملCoherent multiple light scattering in Faraday active materials
Wave propagation in multiple scattering media shows various kinds of coherent phenomena such as coherent backscattering [1,2] or Anderson localization [3], both of which are intimately connected to the concept of reciprocity. Manipulating reciprocity in such media is a powerful tool to study these phenomena in experiments [4]. Here we discuss the manipulation of reciprocity in reflection and tr...
متن کاملSpin-wave localization in disordered magnets
The propagation of spin waves [1] is in the focus of modern research because of its importance for spin caloritronic applications [2–6], and for future information processing devices which might either rely on magnonic [7] instead of electronic transport or combine electronic with magnonic transport. The dynamics of spin waves is mostly described by the Landau-Lifshitz-Gilbert equation, a nonli...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review. E, Statistical, nonlinear, and soft matter physics
دوره 63 2 Pt 2 شماره
صفحات -
تاریخ انتشار 2001