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Resonant field enhancement near bound states in the continuum on periodic structures
Zhen Hu, Lijun Yuan, Ya Yan Lu
On periodic structures sandwiched between two homogeneous media, a bound state in the continuum (BIC) is a guided Bloch mode with a frequency within the radiation continuum. BICs a…
Bound states with complex frequencies near the continuum on lossy periodic structures
Zhen Hu, Lijun Yuan, Ya Yan Lu
On a lossless periodic dielectric structure sandwiched between two homogeneous media, bound states in the continuum (BICs) with real frequencies and real Bloch wavevectors may exis…
Unidirectional Reflectionless Transmission for Two-Dimensional -symmetric Periodic Structures
Lijun Yuan, Ya Yan Lu
Unidirectional reflectionless propagation (or transmission) is an interesting wave phenomenon observed in many -symmetric optical structures. Theoretical studies on u…
Excitation of bound states in the continuum via second harmonic generations
Lijun Yuan, Ya Yan Lu
A bound state in the continuum (BIC) on a periodic structure sandwiched between two homogeneous media is a guided mode with a frequency and a wavenumber such that propagating plane…
Computing resonant modes of circular cylindrical resonators by vertical mode expansions
Hualiang Shi, Ya Yan Lu
Open subwavelength cylindrical resonators of finite height are widely used in various photonics applications. Circular cylindrical resonators are particularly important in nanophot…
Exceptional points for resonant states on parallel circular dielectric cylinders
Amgad Abdrabou, Ya Yan Lu
Exceptional points (EPs) are special parameter values of a non-Hermitian eigenvalue problem where eigenfunctions corresponding to a multiple eigenvalue coalesce. In optics, EPs are…
Indirect link between resonant and guided modes on uniform and periodic slabs
Amgad Abdrabou, Ya Yan Lu
A uniform or periodic dielectric slab can serve as an optical waveguide for which guided modes are important, and it can also be used as a diffraction structure for which resonant…