“Topological photonic anomalies”

Dr. Henning Schomerus
Condensed Matter Theory, Lancaster University

Jun. 24 (Mon.), 11:00 AM
E6-2. 1st fl. #1323

Abstract:
Quantum anomalies arise from topological states with distinct properties that typically are probed by external fields. Here I describe how such anomalous properties can be directly observed in photonic systems, including lasers [1,2,3], exciton polaritoncondensates [4] and supersymmetric discrete-time quantum walks [5].

[1] Topologically protected midgap states in complex photonic lattices
Henning Schomerus,
Opt. Lett. 38, 1912-1914 (2013).
[2] Selective enhancement of topologically induced interface states in a dielectric resonator chain
Charles Poli, Matthieu Bellec, Ulrich Kuhl, Fabrice Mortessagne, and Henning Schomerus,
Nat. Commun. 6, 6710 (2015).
[3] Topological hybrid silicon microlasers
Han Zhao, Pei Miao, Mohammad H. Teimourpour, Simon Malzard, Ramy El-Ganainy, Henning Schomerus, and Liang Feng,
Nat. Commun. 9, 981 (2018). [4] Exciton Polaritons in a Two-Dimensional Lieb Lattice with Spin-Orbit Coupling
C. E. Whittaker et al
Phys. Rev. Lett. 120, 097401 (2018).
[5] Supersymmetric Polarization Anomaly in Photonic Discrete-Time Quantum Walks
Sonja Barkhofen, Lennart Lorz, Thomas Nitsche, Christine Silberhorn, and Henning Schomerus,
Phys. Rev. Lett. 121, 260501 (2018)