Combinatorial Frequency Generation in Quasi-Periodic Stacks of Nonlinear Dielectric Layers

Crystals

Oksana Shramkova¹ 

[1] School of Electronics, Electrical Engineering & Computer Science, Queen’s University Belfast, Queen’s Road, Queen’s Island, Belfast BT3 9DT, UK; E-Mail

关键词: quasi-periodic structure;    nonlinear dielectric;    nonlinear scattering;    three-wave mixing;    combinatorial frequency generation;    Fibonacci stack;    Thue-Morse sequence;   

DOI  :  10.3390/cryst4030209

来源: mdpi

【 摘 要 】

Three-wave mixing in quasi-periodic structures (QPSs) composed of nonlinear anisotropic dielectric layers, stacked in Fibonacci and Thue-Morse sequences, has been explored at illumination by a pair of pump waves with dissimilar frequencies and incidence angles. A new formulation of the nonlinear scattering problem has enabled the QPS analysis as a perturbed periodic structure with defects. The obtained solutions have revealed the effects of stack composition and constituent layer parameters, including losses, on the properties of combinatorial frequency generation (CFG). The CFG features illustrated by the simulation results are discussed. It is demonstrated that quasi-periodic stacks can achieve a higher efficiency of CFG than regular periodic multilayers.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.