Femtosecond laser surface modification induced the tunable of nonlinear optical property of single-crystal silicon

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2024-11-20 DOI:10.1016/j.optmat.2024.116453

Hao Liu , Jiawei Wang , Kun Wang , Ruijin Hong , Weili Zhang , Chunxian Tao , Qi Wang , Hui Lin , Zhaoxia Han , Dawei Zhang

引用次数: 0

Abstract

Tunable nonlinear optical properties were realized by femtosecond laser surface modification of single-crystal silicon with periodic grating-like structures. The as-modified samples exhibit a nonlinear behavior with a transition from reverse saturation absorption (RSA) to saturation absorption (SA) with the increase of laser power due to the introduction of oxide and defect in Si. The maximum third-order nonlinear absorption coefficients can reach −1.16 × 10⁻⁴ cm/W. And the epsilon-near-zero wavelength of as-modified samples can be tuned from 191 nm to 508 nm. The finite-difference time-domain simulation results are in good agreement with the test results of the samples.

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飞秒激光表面改性诱导单晶硅非线性光学特性可调

通过飞秒激光对具有周期性光栅样结构的单晶硅进行表面改性，实现了可调谐非线性光学特性。由于硅中氧化物和缺陷的引入，改性后的样品表现出非线性行为，随着激光功率的增加，从反向饱和吸收（RSA）过渡到饱和吸收（SA）。最大三阶非线性吸收系数可达-1.16 × 10-4 cm/W。改性样品的ε-近零波长可从 191 nm 调至 508 nm。有限差分时域模拟结果与样品的测试结果非常吻合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.