2009/01/01 by Bo Zhen, Chia Wei Hsu, Ling Lü +6 · 2 citations
Business, Management and Accounting · Engineering · Physics and Astronomy · Social Sciences · #Annihilation #Bound state #Education Methods and Integration #Education and Teacher Training #Higher Education Teaching and Evaluation #Humanities #Optical vortex #Philosophy #Photonic Crystals and Applications #Photonic and Optical Devices #Photonic crystal #Photonics #Physics #Plasmonic and Surface Plasmon Research #Polarization (electrochemistry) #Political science #Quantum mechanics #Topological defect #Topological quantum number #Topology (electrical circuits) #Vortex #physics.optics
paper · pdf · doi:10.1103/physrevlett.113.257401
published as Phys. Rev. Lett. 113, 257401 (2014)
openalex publication_date 2009/01/01 · arxiv created 2014/08/01 · arxiv updated 2014/12/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/04/28
Optical bound states in the continuum (BICs) have recently been realized in photonic crystal slabs, where the disappearance of out-of-plane radiation turns leaky resonances into guided modes with infinite lifetimes. We show that such BICs are vortex centers in the polarization directions of far-field radiation. They carry conserved and quantized topological charges, defined by the winding number of the polarization vectors, which ensure their robust existence and govern their generation, evolution, and annihilation. Our findings connect robust BICs in photonics to a wide range of topological physical phenomena.