منابع مشابه
Space group theory and Fourier space analysis of two-dimensional photonic crystal waveguides
The symmetry, Fourier space and space group properties of two-dimensional photonic crystal waveguides are discussed. The modes of the standard single missing line defect waveguide can be classified as even or odd along the transverse direction. This is contrasted with the modes of line defect waveguides with a glide plane along the propagation direction. In this case the spatial Fourier series ...
متن کاملDesign of full-k-space flat bands in photonic crystals beyond the tight-binding picture
Based on a band engineering method, we propose a theoretical prescription to create a full-k-space flat band in dielectric photonic crystals covering the whole Brillouin Zone. With wave functions distributed in air instead of in the dielectrics, such a flat band represents a unique mechanism for achieving flat dispersions beyond the tight-binding picture, which can enormously reduce the require...
متن کاملApplicability of effective medium description to photonic crystals in higher bands: Theory and numerical analysis
We consider conditions under which photonic crystals (PCs) can be homogenized in the higher photonic bands and, in particular, near the point. By homogenization we mean introducing some effective local parameters eff and μeff that describe reflection, refraction, and propagation of electromagnetic waves in the PC adequately. The parameters eff and μeff can be associated with a hypothetical homo...
متن کاملReal space renormalization group theory of disordered models of glasses.
We develop a real space renormalization group analysis of disordered models of glasses, in particular of the spin models at the origin of the random first-order transition theory. We find three fixed points, respectively, associated with the liquid state, with the critical behavior, and with the glass state. The latter two are zero-temperature ones; this provides a natural explanation of the gr...
متن کاملEtched distributed Bragg reflectors as three-dimensional photonic crystals: photonic bands and density of states.
The photonic band dispersion and density of states (DOS) are calculated for the three-dimensional (3D) hexagonal structure corresponding to a distributed Bragg reflector patterned with a 2D triangular lattice of circular holes. Results for the Si/SiO(2) and GaAs/Al(x)Ga(1-x)As systems determine the optimal parameters for which a gap in the 2D plane occurs and overlaps the 1D gap of the multilay...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2018
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.121.263903