Photonics Research, 2017, 5 (1): 01000011, Published Online: Feb. 8, 2017
Photonic bandgap structure and long-range periodicity of a cumulative Fibonacci lattice Download: 691次
Multilayers Multilayers Photonic crystals Photonic crystals Bragg reflectors Bragg reflectors Interference Interference
Abstract
In this work, we study the photonic band of cumulative Fibonacci lattices, of which the structure is composed of all generated units in a Fibonacci sequence. The results are compared with distributed Bragg reflector (DBR) structures with the same numbers of layers. Photonic bandgaps are found at two characteristic frequencies, symmetrically separated from the central bandgap in the DBR counterpart. Field amplitude and phase distribution in the Fibonacci lattice indicates an interferential origin of the bandgaps. Fourier transform on the refractive index profile is carried out, and the result confirms a determinate long-range periodicity that agrees well with the photonic band structure.Province of China (Q2015002).
Xiong Hui, Chenhui Yu. Photonic bandgap structure and long-range periodicity of a cumulative Fibonacci lattice[J]. Photonics Research, 2017, 5(1): 01000011.