Engineering high Pockels coefficients in thin-film strontium titanate for cryogenic quantum electro-optic applications

IF 45.8 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-10-23 DOI:10.1126/science.adx3741

Anja Ulrich, Kamal Brahim, Andries Boelen, Michiel Debaets, Ahmed Khalil, Conglin Sun, Yishu Huang, Sandeep Seema Saseendran, Marina Baryshnikova, Paola Favia, Thomas Nuytten, Stefanie Sergeant, Kasper Van Gasse, Bart Kuyken, Kristiaan De Greve, Clement Merckling, Christian Haffner

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引用次数: 0

Abstract

Pockels materials are notable for their strong electro-optic interaction and rapid response times and are therefore used extensively in optical communications. However, at cryogenic temperatures, Pockels coefficients are reduced in many materials optimized for room-temperature operation, which is a major hurdle for emerging quantum technologies. Here, we show that strontium titanate (SrTiO₃) can be engineered to exhibit a Pockels coefficient of 345 picometers per volt at 20 hertz at cryogenic temperatures, a value twice as high as any other thin-film electro-optic material. By adjusting the stoichiometry, we were able to increase the Curie temperature and realize a ferroelectric phase yielding a high Pockels coefficient, so far with limited optical losses of decibels per centimeter. Our findings position SrTiO₃ as a promising material for cryogenic quantum photonics applications.

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低温量子电光应用中钛酸锶薄膜的工程高波克尔斯系数

Pockels材料以其强的电光相互作用和快速的响应时间而闻名，因此在光通信中得到广泛应用。然而，在低温下，许多适合室温操作的材料的波克尔斯系数降低，这是新兴量子技术的主要障碍。在这里，我们展示了钛酸锶（srtio3）可以被设计成在低温下在20赫兹下表现出345皮米/伏的波克尔系数，这个值是任何其他薄膜电光材料的两倍。通过调整化学计量，我们能够提高居里温度，并实现产生高波克尔系数的铁电相，到目前为止，每厘米的光学损失有限，仅为分贝。我们的发现表明srtio3是一种很有前途的低温量子光子学材料。

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

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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