TY - JOUR
T1 - Non-Hermitian Delocalization in a Two-Dimensional Photonic Quasicrystal
AU - Zhang, Zhaoyang
AU - Liang, Shun
AU - Septembre, Ismaël
AU - Yu, Jiawei
AU - Huang, Yongping
AU - Liu, Maochang
AU - Zhang, Yanpeng
AU - Xiao, Min
AU - Malpuech, Guillaume
AU - Solnyshkov, Dmitry
N1 - Publisher Copyright:
© 2024 American Physical Society.
PY - 2024/6/28
Y1 - 2024/6/28
N2 - Theoretical and experimental studies suggest that both Hermitian and non-Hermitian quasicrystals show localization due to the fractal spectrum and to the transition to diffusive bands via exceptional points, respectively. Here, we present an experimental study of a dodecagonal photonic quasicrystal based on electromagnetically induced transparency in a Rb vapor cell. First, we observe the suppression of the wave packet expansion in the Hermitian case. We then discover a new regime, where increasing the non-Hermiticity leads to delocalization, demonstrating that the behavior in non-Hermitian quasicrystals is richer than previously thought.
AB - Theoretical and experimental studies suggest that both Hermitian and non-Hermitian quasicrystals show localization due to the fractal spectrum and to the transition to diffusive bands via exceptional points, respectively. Here, we present an experimental study of a dodecagonal photonic quasicrystal based on electromagnetically induced transparency in a Rb vapor cell. First, we observe the suppression of the wave packet expansion in the Hermitian case. We then discover a new regime, where increasing the non-Hermiticity leads to delocalization, demonstrating that the behavior in non-Hermitian quasicrystals is richer than previously thought.
UR - https://www.scopus.com/pages/publications/85197348419
U2 - 10.1103/PhysRevLett.132.263801
DO - 10.1103/PhysRevLett.132.263801
M3 - 文章
C2 - 38996306
AN - SCOPUS:85197348419
SN - 0031-9007
VL - 132
JO - Physical Review Letters
JF - Physical Review Letters
IS - 26
M1 - 263801
ER -