Title :
Anderson localizations and photonic band-tail states observed in compositionally disordered platform
:
Myungjae Lee, Jeongkug Lee, Sunghwan Kim, Ségolène Callard, Christian Seassal, and Heonsu Jeon
:
Sci. Adv. 4(1), e1602796 (2018)
Anderson localization in random structures is an intriguing physical phenomenon, for which experimental
verifications are far behind theoretical predictions. Here we report the first experimental confirmations
of photonic band-tail states and a complete transition of Anderson localization. An optically activated
photonic crystal alloy platform enables the acquisition of extensive experimental data exclusively on
pure eigenstates, revealing direct evidences on band-tail states and Anderson localization transition
within the band-tail states. Analyses of both experimental and simulated data lead to a comprehensive
picture of photon localization that is highly consistent with theories by Anderson and others. We believe
that our results provide a strong experimental foundation upon which both the fundamental
understandings and application possibility of Anderson localization can be promoted significantly.
