Open AccessTheoretical study on the Cerenkov-type second-harmonic generation in optical superlattices without paraxial approximation
Author(s) -
Yangyang Yue,
Xiao Han,
Bo Yang,
Ronger Lu,
Xuhao Hong,
Chao Zhang,
Yiqiang Qin,
Yanyan Zhu
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.011539
Subject(s) - paraxial approximation , physics , optics , boundary value problem , second harmonic generation , superlattice , phase (matter) , quantum mechanics , laser , beam (structure)
In this paper, the Cerenkov-type second-harmonic generation in bulk optical superlattices has been studied theoretically with the non-paraxial wave equations, where the paraxial approximation is avoided. The corresponding phase-matching condition is determined strictly by solving the non-paraxial wave equations under proper boundary conditions, and the result coincides well with the traditional Cerenkov phase-matching condition. In addition, a backward Cerenkov phase-matching condition is deduced from the wave equations as well, and the physical requirement of this condition is clarified.