Science Daily June 1, 2022
Anderson localization predicts that transport in one-dimensional uncorrelated disordered systems comes to a complete halt, experiencing no transport whatsoever. However, a disordered physical system is always correlated because it must have a finite spectrum. Localization is dominant only for wave packets whose spectral extent resides within the region of the wave number span of the disorder. An international team of researchers (Israel, Germany, Spain) has experimentally shown that Anderson localization can occur and even be dominant for wave packets residing entirely outside the spectral extent of the disorder. The team studied the evolution of wave packets in synthetic photonic lattices containing bandwidth-limited (correlated) disorder and observed strong localization for wave packets centered at twice the mean wave number of the disorder spectral extent and at low wave numbers, both far beyond the spectrum of the disorder. The work sheds light on fundamental aspects of disordered systems and offers avenues for using spectrally shaped disorder for controlling transport…read more. Open Access TECHNICAL ARTICLEÂ
Localization through spectrally dependent scattering and transitions. Credit: SCIENCE ADVANCES, 25 May 2022, Vol 8, Issue 21