Quasi-flat bands in waveguide arrays

18th International Youth Scientific School "Coherent Optics and Optical Spectroscopy"

Maimistov, A.I.^1,2

Department of Solid State Physics and Nanostructures, National Research Nuclear University MEPhI, Moscow

115409, Russia^1

Department of Physics and Technology of Nanostructures, Moscow Institute for Physics and Technology, Dolgoprudny, Moscow region

141700, Russia^2

关键词: Flat band;    Linear modes;    Negative refraction index;    Photon crystals;    Refraction index;    Unit cells;    Waveguide array;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/613/1/012011/pdf
DOI  :  10.1088/1742-6596/613/1/012011

来源: IOP

【 摘 要 】

Coupled electromagnetic waves propagating in a waveguide array are discussed. This waveguide array can be considered as a one dimensional photon crystal composed from the unit cell containing three different waveguides, namely, two positive refraction index waveguides and one waveguide with negative refraction index. Spectrum of the linear modes of electromagnetic waves in this device contains the quasi-flat band.