TY - JOUR
T1 - Landau Rainbow Induced by Artificial Gauge Fields
AU - Zhao, Wen
AU - Zheng, Yanji
AU - Lu, Cuicui
AU - Wang, Zhihao
AU - Liu, Yong Chun
AU - Zhang, Shuang
N1 - Publisher Copyright:
© 2024 American Physical Society.
PY - 2024/12/6
Y1 - 2024/12/6
N2 - The ability to generate Landau levels using a pseudomagnetic field (PMF), also called an artificial gauge field, opens up new pathways for exploring fundamental physics and developing novel applications based on topological protection. In this Letter, we simultaneously realize a PMF and a pseudoelectric field (PEF) on a photonic crystal platform and observe a rainbow effect of the Landau zeroth modes. While a PMF induces a series of discretized Landau levels of photons in a similar way as the quantum Hall effect for electrons, a PEF breaks the degeneracy of the flat band of Landau levels over a broad range. Thus, different frequencies of the Landau modes can be dispersed into different spatial positions, leading us to term this phenomenon the "Landau rainbow."The Landau rainbow, induced by the joint action of PMFs and PEFs, features robustness, broadband capability, and scalability, and may find applications in areas such as slow-light effect, multifrequency divider, and optical information multiplexing.
AB - The ability to generate Landau levels using a pseudomagnetic field (PMF), also called an artificial gauge field, opens up new pathways for exploring fundamental physics and developing novel applications based on topological protection. In this Letter, we simultaneously realize a PMF and a pseudoelectric field (PEF) on a photonic crystal platform and observe a rainbow effect of the Landau zeroth modes. While a PMF induces a series of discretized Landau levels of photons in a similar way as the quantum Hall effect for electrons, a PEF breaks the degeneracy of the flat band of Landau levels over a broad range. Thus, different frequencies of the Landau modes can be dispersed into different spatial positions, leading us to term this phenomenon the "Landau rainbow."The Landau rainbow, induced by the joint action of PMFs and PEFs, features robustness, broadband capability, and scalability, and may find applications in areas such as slow-light effect, multifrequency divider, and optical information multiplexing.
UR - http://www.scopus.com/inward/record.url?scp=85211240203&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.133.233801
DO - 10.1103/PhysRevLett.133.233801
M3 - Article
C2 - 39714650
AN - SCOPUS:85211240203
SN - 0031-9007
VL - 133
JO - Physical Review Letters
JF - Physical Review Letters
IS - 23
M1 - 233801
ER -