High-Birefringence and Quarter-Wave Plates at 1550 nm Using Azopolymers

IF 2.5 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-04-24 DOI:10.1109/LPT.2025.3564052

Beatriz Soares;Susana Silva;Paulo Ribeiro;Orlando Frazão

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引用次数: 0

Abstract

Azobenzenes are a class of compounds which allow the writing and erasure of linear birefringence along any desired direction, through their ability to photoisomerize. This property enables applications requiring polarization control, which, despite extensive exploration in the visible spectrum, have yet to be fully capitalized in the infrared region. This study aims to systematically characterize the creation and relaxation of induced linear birefringence dynamics in azopolymers thin films for the 1550 nm region. Maximum birefringence values as high as

$6.02\times 10^{-2}$

were attained during the recording phase with a 445 nm pump laser, that stabilized at

$5.40\times 10^{-2}$

during the relaxation phase, achieved for a

$2.4~\mu m$

sample. In addition, a maximum phase shift of

$\Delta \Phi = 0.54\pi $

stabilizing at

$\Delta \Phi = 0.50\pi $

, was observed for a

$9.7~\mu m$

sample with a 532 nm writing laser. Accordingly, this shows the promising potential of azopolymers for many applications.

查看原文本刊更多论文

使用偶氮聚合物的1550nm高双折射和四分之一波片

偶氮苯是一类化合物，通过它们的光异构化能力，可以沿着任何期望的方向写入和消除线性双折射。这种特性使得需要偏振控制的应用成为可能，尽管在可见光谱中进行了广泛的探索，但在红外区域尚未充分利用。本研究旨在系统地表征在1550nm区域偶氮聚合物薄膜中诱导线性双折射动力学的产生和弛豫。在记录阶段，445 nm泵浦激光器获得了高达$6.02\times 10^{-2}$的最大双折射率值，在弛豫阶段，$2.4~\mu m$样品稳定在$5.40\times 10^{-2}$。此外，在532 nm写入激光下，$9.7~\mu m$样品的最大相移为$\Delta \Phi = 0.54\pi $，稳定在$\Delta \Phi = 0.50\pi $。因此，这显示了偶氮聚合物在许多应用方面的良好潜力。

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

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.