Hexagonally poled lithium niobate: A two-dimensional nonlinear photonic crystal
Hexagonally poled lithium niobate: A two-dimensional nonlinear photonic crystal
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DOI：
10.1103/physrevlett.84.4345
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发表时间：
2000-05-08
影响因子：
8.6
通讯作者：
Hanna, DC
中科院分区：
文献类型：
--
作者：
Broderick, NGR;Ross, GW;Hanna, DC
我们报告了我们认为是二维（2D）非线性光子晶体的第一个例子的制造[Berger，Phys.Rev.Lett. 81，4136（1998）]，其中折射率是常数，但二阶非线性极化率是空间周期性的。这种晶体允许使用多个倒易晶格矢量进行有效的准相位匹配和谐波产生。利用皮秒脉冲测量了外部二次谐波转换效率>60%。制造技术是非常通用的，应该允许制造广泛的二维晶体，包括准晶体。
We report on the fabrication of what we believe is the first example of a two-dimensional (2D) nonlinear photonic crystal [Berger, Phys. Rev. Lett. 81, 4136 (1998)], where the refractive index is constant but where the 2nd order nonlinear susceptibility is spatially periodic. Such crystals allow for efficient quasi-phase-matched and harmonic generation using multiple reciprocal lattice vectors. External 2nd harmonic conversion efficiencies >60% were measured with picosecond pulses. The fabrication technique is extremely versatile and should allow for the fabrication of a broad range of 2D crystals including quasicrystals.