Current Progress on 229Th Nuclear Clock

doi:10.3390/photonics13020141

2026-01-31

DOI：10.3390/photonics13020141

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基于低能核跃迁的Th-229核钟作为下一代时间和频率标准已引起广泛关注，其性能有望超越当前领先的光学原子钟。由于核跃迁天然隔离于外部电磁场，其对黑体辐射和环境噪声的敏感性远低于电子跃迁，这使得核钟在稳定性和准确性方面具有独特优势。本文综述了核钟研究的最新进展，重点介绍了Th-229同位素体的物理性质、核钟的工作原理及主要实现方法。通过比较关键技术路径（特别是俘获离子和钍掺杂晶体），并引入用于驱动核跃迁的VUV频梳技术。最后，我们对该领域的未来发展方向进行了展望。

Keyword:

nuclear clock

Th-229 isomer

vacuum ultraviolet frequency comb

high-order harmonic generation

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Photonics

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songshan lake materials laboratory

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chinese academy of sciences

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56.7W

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south china university of technology

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6.8W

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