SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 30: Nano-optics
Q 30.2: Vortrag
Mittwoch, 8. März 2023, 11:15–11:30, F442
Reentrant delocalization transition in one-dimensional photonic quasicrystals — Sachin Vaidya1, •Christina Jörg1,2, Kyle Linn2, Megan Goh3, and Mikael C. Rechtsman1 — 1Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA — 2Physics Department and Research Center OPTIMAS, TU Kaiserslautern, D- 67663 Kaiserslautern, Germany — 3Department of Physics, Amherst College, Amherst, MA 01002, USA
Over the past few years, there has been significant interest in exploring the localization of waves propagating in disordered media, also known as Anderson localization. We experimentally demonstrate that the localization transition in certain one-dimensional photonic quasicrystals (PhQC) is followed by a surprising second delocalization transition upon further increasing quasiperiodic disorder strength - an example of a reentrant transition. We measure this localization and reentrant delocalization via the inhibition and complete recovery of transmission through an Aubry-André type PhQC for increasing quasiperiodic modulation. To further shed light on the observed reentrant transition, we also develop a tight-binding model inspired by the PhQCs that captures the essential localization physics of our system.