A5072472198- Topological Materials and Phenomena
- Quantum Mechanics and Non-Hermitian Physics
- Metamaterials and Metasurfaces Applications
- Strong Light-Matter Interactions
- Photonic Crystals and Applications
- Photonic and Optical Devices
- Algebraic structures and combinatorial models
- Cold Atom Physics and Bose-Einstein Condensates
Southern University of Science and Technology
2024-2025
University of Hong Kong
2018
Axions, hypothetical elementary particles that remain undetectable in nature, can arise as quasiparticles three-dimensional crystals known axion insulators. Previous implementations of insulators have largely been limited to two-dimensional systems, leaving their topological properties three dimensions unexplored experiment. Here, we realize an insulator a photonic crystal and probe its properties. Demonstrated features include half-quantized Chern numbers on each surface resembles...
The topological phases in materials have been studied recent decades for their unique boundary states and transport properties. Photonic systems with band structures embrace the closely, where they not only provide platforms to testify theory, but also shed light on designing novel optical devices. In this review, we present exciting developments, supported by brief descriptions of prominent milestones photonic years. These studies may sustain further developments devices offer methods manipulations.
Recently, a concept of topological photonic alloy was proposed by mixing magnetized and non-magnetized gyromagnetic rods in two-dimensional square crystal that supports tunable Chern bandgaps robust chiral edge states even at low concentration rods. However, whether such notion can be extended to non-crystalline systems is still an open question. Here, we theoretically demonstrate quasicrystal alloys also sustain nontrivial nonreciprocal states. More interestingly, compared with the...
<title>Abstract</title> <bold>Recently, topological Dirac-vortex modes in Kekulé-distorted photonic lattices have attracted broad interest and exhibited promising applications robust devices such as cavities, lasers, fibers. However, due to the vectorial nature of electromagnetic waves that results complicated band dispersions fails tight-binding model predictions, it is challenging construct three-dimensional (3D) structures with Kekulé distortion thus far been limited two-dimensional (2D)...