Sheng Yan, Li Jingjuan, Cheng Bingying, Zhang Daozhong
Optical Physics Laboratory, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.
Appl Opt. 2007 Jun 1;46(16):3318-22. doi: 10.1364/ao.46.003318.
We present a novel design of enhanced second-harmonic generation in a periodically poled ferroelectric crystal. It profits from enhanced light intensity and slowed group velocity, which occur near photonic band edges through electro-optic modulation. The designed structure, with 108 periods and a length of 322 microm, can generate a second-harmonic beam whose conversion efficiency is 2 orders of magnitude larger than the one produced by an equivalent length of quasi-phase-matching bulk medium. This result might be beneficial to the development of optics integration and compact devices.
我们展示了一种在周期性极化铁电晶体中增强二次谐波产生的新颖设计。它得益于通过电光调制在光子带隙边缘附近出现的增强光强和减慢的群速度。所设计的结构有108个周期，长度为322微米，能够产生二次谐波光束，其转换效率比同等长度的准相位匹配块状介质产生的转换效率大两个数量级。这一结果可能有利于光学集成和紧凑型器件的发展。
