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Open AccessTopological phononics arising from fluid-solid interactions
Nontrivial band topologies have been discovered in classical systems and hold great potential for device applications. Unlike photons, sound has fundamentally different dynamics and symmetries in fluids and so...
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Open AccessObservation of boundary induced chiral anomaly bulk states and their transport properties
The most useful property of topological materials is perhaps the robust transport of topological edge modes, whose existence depends on bulk topological invariants. This means that we need to make volumetric c...
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Open AccessFour-band non-Abelian topological insulator and its experimental realization
Very recently, increasing attention has been focused on non-Abelian topological charges, e.g., the quaternion group Q8. Different from Abelian topological band insulators, these systems involve multiple entangled...
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Experimental observation of non-Abelian topological charges and edge states
In the last few decades, topological phase1–11 has emerged as a new classification of matter states beyond the Ginzburg–Landau symmetry-breaking paradigm. The underlying global invariant is usually well character...
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Open AccessMomentum space toroidal moment in a photonic metamaterial
Berry curvature, the counterpart of the magnetic field in the momentum space, plays a vital role in the transport of electrons in condensed matter physics. It also lays the foundation for the emerging field of...
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Open AccessNon-Abelian gauge field optics
The concept of gauge field is a cornerstone of modern physics and the synthetic gauge field has emerged as a new way to manipulate particles in many disciplines. In optics, several schemes of Abelian synthetic...
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Open AccessTime Circular Birefringence in Time-Dependent Magnetoelectric Media
Light traveling in time-dependent media has many extraordinary properties which can be utilized to convert frequency, achieve temporal cloaking and simulate cosmological phenomena. In this paper, we focus on t...