Detection of Nonlinearity in Photonic Lattices

IF 9.8 1区 物理与天体物理 Q1 OPTICS Laser & Photonics Reviews Pub Date : 2024-11-06 DOI:10.1002/lpor.202400937
Pengbo Jia, Zhaochen Li, Shiqiang Xia, Domenico Bongiovanni, Liqin Tang, Wenrong Qi, Yingying Zhang, Xingdong Zhao, Keyu Su, Zunlue Zhu, Yi Hu
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Abstract

Although periodic photonic structures, especially associated with nonlinearity, play a prominent role in optics nowadays, effective detection of their nonlinearity still remains a critical challenge. Here, an approach is proposed to detect the nonlinearity of photonic lattices in a direct way. By properly launching structured beams, namely Airy beams, into the lattices, the nonlinear response function of the discrete system can be directly obtained in the nonlinearly-shaped beam profiles. To be specific, a single Airy beam is utilized to map self-defocusing nonlinearity, while self-focusing nonlinearity, which is hard to visualize in the bulk case, is readily discerned by employing double Airy beams in photonic structures. The proposed method is validated numerically and experimentally by detecting different types of nonlinearities of photonic lattices fabricated in a nonlinear crystal. These findings introduce a promising route for characterizing the nonlinear response of optical structures, thereby broadening the scope of nonlinear measurement and is expected to be extended into other periodic photonic structures.

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光子晶格中的非线性检测
尽管周期性光子结构(尤其是与非线性相关的结构)在当今光学领域发挥着重要作用,但有效探测其非线性仍是一项严峻挑战。本文提出了一种直接探测光子晶格非线性的方法。通过向光子晶格适当发射结构光束(即艾里光束),可以直接从非线性形状的光束轮廓中获得离散系统的非线性响应函数。具体来说,单Airy光束可用于绘制自失焦非线性图,而在光子结构中使用双Airy光束,则可轻松辨别在块体情况下难以观察到的自失焦非线性。通过检测在非线性晶体中制造的光子晶格的不同类型的非线性,对所提出的方法进行了数值和实验验证。这些发现为表征光学结构的非线性响应引入了一条前景广阔的途径,从而拓宽了非线性测量的范围,并有望扩展到其他周期性光子结构中。
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来源期刊
CiteScore
14.20
自引率
5.50%
发文量
314
审稿时长
2 months
期刊介绍: Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.
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