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Tungsten based Anisotropic Metamaterial as an Ultra-broadband Absorber
Yinyue Lin, Yanxia Cui, Fei Ding +4
The trapped rainbow effect has been mostly found on tapered anisotropic metamaterials (MMs) made of low loss noble metals, such as gold, silver, etc. In this work, we demonstrate t…
Electrical tunability due to coalescence of exceptional points in parity-time symmetric waveguides
Jin Wang, Hui Yuan Dong, Raymond P. H. Wu +2
We demonstrate theoretically the electric tunability due to coalescence of exceptional points in PT-symmetric waveguides bounded by imperfect conductive layers. Owing to the compet…
Anomalous Light Scattering by Topological -symmetric Particle Arrays
C. W. Ling, Ka Hei Choi, T. C. Mok +2
Robust topological edge modes may evolve into complex-frequency modes when a physical system becomes non-Hermitian. We show that, while having negligible forward optical extinction…
Simultaneous Multi-frequency Topological Edge Modes between One-dimensional Photonic Crystals
Ka Hei Choi, C. W. Ling, K. F. Lee +2
We show theoretically that, in the limit of weak dispersion, one-dimensional (1D) binary centrosymmetric photonic crystals can support topological edge modes in all photonic band g…