Multipolar origin of bound states in the continuum
By Z. Sadrieva, K. Frizyuk, M. Petrov, Yuri Kivshar, A. Bogdanov. Physical review B, 2019
206 citations recorded by the source corpus.
Metasurfaces based on resonant subwavelength photonic structures enable novel ways of wavefront control and light focusing, underpinning a new generation of flat-optics devices. Recently emerged all-dielectric metasurfaces exhibit high-quality resonances underpinned by the physics of bound states in the continuum that drives many interesting concepts in photonics. Here we suggest a novel approach to explain the physics of bound photonic states embedded into the radiation continuum. We study dielectric metasurfaces composed of planar periodic arrays of Mie-resonant nanoparticles ("meta-atoms") which support both symmetry protected and accidental bound states in the continuum and employ the multipole decomposition approach to reveal the physical mechanism of the formation of such nonradiating states in terms of multipolar modes generated by isolated meta-atoms. Based on the symmetry of the vector spherical harmonics, we identify the conditions for the existence of bound states in the continuum originating from the symmetries of both the lattice and the unit cell. Using this formalism we predict that metasurfaces with strongly suppressed spatial dispersion can support the bound states in the continuum with the wavevectors forming a line in the reciprocal space. Our results provide a new way of designing high-quality resonant photonic systems based on the physics of bound states in the continuum.
Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/14a406f0c33a078ed98be5b7db4689db6c30adb3
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Atomic and Molecular Physics, and Optics
In Biomedical Engineering
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Applications of bound states in the continuum in photonics (2023, background): “One single resonance can also evolve into BICs if the single resonance is considered to be derived from the coupling of a set of coupled modes 22–25 or electromagnetic multipoles 26,27 , allowing for the possibility of destructive interference.”