Bound states in the continuum in photonic structures
A.A. Bogdanov†b,c aNonlinear Physics Centre, Research School of Physical Sciences and Engineering, Australian National University, Mlls Road, Bldng 59, Canberra, 0200, Australia bSchool of Physics and Engineering, ITMO University, Birzhevaya liniya V.O., 16, St. Peterburg, 199034, Russian Federation cHarbin Engineering University, Qingdao Innovation and Development Center, Sansha road 1777, Qingdao, Shandong, 266000, China
Bound states in the continuum (BICs) are a striking example of how a solution to a simple problem of quantum mechanics, obtained about a century ago, can serve as an incentive to study a wide range of resonance phenomena in wave physics. Due to the giant radiative lifetime, BICs have found multiple applications in various fields of physics studying wave processes, in particular, in hydrodynamics, atomic phys„ics, and acoustics. In this review, we present a broad view of the physics of BICs and related effects, focusing primarily on photonic dielectric structures. We consider the history of the development of BIC studies, the main physical mechanisms of their formation, and specific examples of structures that can support such states. We also discuss possible practical applications of BICs in optics, photonics, and radiophysics.
Keywords: bound states in the continuum, metasurfaces, res„onators, Fano resonance, diffraction structures, nanophotonics PACS:42.25.Bs, 42.25.Fx, 42.79.Dj, 42.82.Et (all) DOI:10.3367/UFNe.2021.12.039120 URL: https://ufn.ru/en/articles/2023/5/c/ Citation: Koshelev K L, Sadrieva Z F, Shcherbakov A A, Kivshar Yu S, Bogdanov A A "Bound states in the continuum in photonic structures" Phys. Usp.66 494–517 (2023)