Nonlinear detour phase holography
Nonlinear detour phase holography
复制标题
非线性绕行相位全息术
DOI：
10.1039/d0nr07069f
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发表时间：
2021
期刊：
影响因子：
6.7
通讯作者：
Sheng Yan
中科院分区：
文献类型：
--
作者：
Wang Bingxia;Hong Xuanmiao;Wang Kai;Chen Xin;Liu Shan;Krolikowski Wieslaw;Lu Peixiang;Sheng Yan
非线性光子晶体具有高效的非线性波前操控能力，为实现小型化、大规模集成化非线性器件提供了良好的平台。然而，目前的非线性光子晶体的非线性编码方法本质上需要大量无序和复杂的微结构，这在真实的制造过程中是相当具有挑战性的。在此，我们提出并实验证明了一种非线性绕道相位方法，用于非线性光子晶体中的非线性波前操纵。利用该方法，设计的非线性迂回相位全息图只需要一组形状简单的基本构建块，易于利用飞秒激光写入技术制作。通过设计非线性迂回相位图，演示了二次谐波全息图，并讨论了二次谐波全息成像过程中的准相位匹配方案。本研究概念性地将传统的迂回相位法扩展到非线性领域，为具有多功能的紧凑型非线性微器件提供了新的可能性。
Nonlinear photonic crystals are capable of highly efficient nonlinear wavefront manipulation, providing a promising platform for compact and large-scale integrated nonlinear devices. However, the current nonlinear encoding methods for nonlinear photonic crystals inherently require a number of disordered and complex microstructures, which are quite challenging in a real fabrication process. Herein we propose and experimentally demonstrate a nonlinear detour phase method for nonlinear wavefront manipulation in nonlinear photonic crystals. With the proposed method, the designed nonlinear detour phase hologram only requires a set of basic building blocks with simple shapes, which are easy to fabricate by using the femtosecond laser writing technique. The second-harmonic hologram is demonstrated by designing the nonlinear detour phase patterns, and the quasi-phase-matching scheme in the second-harmonic holographic imaging process is also discussed. This study conceptually extends the conventional detour phase method into the nonlinear regime, offering new possibilities for compact nonlinear micro-devices with multi-functions.