光子晶体
二次谐波产生
等离子体
光学
非线性系统
物理
电场
高次谐波产生
光子学
强度(物理)
材料科学
能量转换效率
谐波
带隙
光电子学
激光器
声学
量子力学
作者
Cheng Yang,Chenghao Guo,Chuan Peng,Haifeng Zhang
标识
DOI:10.1002/andp.202300190
摘要
Abstract In this paper, a 1D nonlinear plasma photonic crystal (NPPC) structure composed of polarized ferroelectric crystals and nonlinear plasma periodic alternation is proposed. The transfer matrix method is employed to analyze the second harmonic generation (SHG) problem of this structure. In the designed NPPCs, the fundamental wave (FW) operates in the gigahertz (GHz) band and the nonlinear plasma is controlled by an external high‐intensity control wave (CW). Numerical simulations are performed to investigate the effects of different incident angles and external CW intensities on the total conversion efficiency (T‐con) of the second harmonic wave (SHW). Additionally, the internal electric field distribution and incident light intensity within the nonlinear structure are analyzed. The importance of the relationship between the FW frequency and photonic band gap (PBG) in enhancing SHG is summarized. The results demonstrate that the optimal structure can be obtained by changing the structural parameters, such that the FW and SHW are tuned to the edge of the PBG. At this point, the electromagnetic field density is large, the group velocity is small, the local field is enhanced, and the nonlinear optical interaction is increased, resulting in a significant increase in the T‐con of the SHW.
科研通智能强力驱动
Strongly Powered by AbleSci AI