High-harmonic generation by a bright squeezed vacuum

IF 17.6 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Nature Physics Pub Date : 2024-10-02 DOI:10.1038/s41567-024-02659-x
Andrei Rasputnyi, Zhaopin Chen, Michael Birk, Oren Cohen, Ido Kaminer, Michael Krüger, Denis Seletskiy, Maria Chekhova, Francesco Tani
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Abstract

High-harmonic generation has been driving the development of attosecond science and sources. More recently, high-harmonic generation in solids has been adopted by other communities as a method to study material properties. However, so far high-harmonic generation has only been driven by classical light, despite theoretical proposals to do so with quantum states of light. Here we observe non-perturbative high-harmonic generation in solids driven by a macroscopic quantum state of light, a bright squeezed vacuum, which we generate in a single spatiotemporal mode. The process driven by a bright squeezed vacuum is considerably more efficient in the generation of high harmonics than classical light of the same mean intensity. Due to its broad photon-number distribution, covering states from 0 to 2 × 1013 photons per pulse, and strong subcycle electric field fluctuations, a bright squeezed vacuum gives access to free carrier dynamics within a much broader range of peak intensities than accessible with classical light. High-harmonic generation has so far been driven only by classical light. Now, its driving by a bright squeezed vacuum—a quantum state of light—has been observed and shown to be more efficient than using classical light.

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明亮挤压真空产生的高次谐波
高次谐波发生一直推动着阿秒科学和阿秒源的发展。最近,固体中的高次谐波发生已被其他团体采用,作为研究材料特性的一种方法。然而,迄今为止,高次谐波发生仅由经典光驱动,尽管理论上建议用光量子态来驱动高次谐波发生。在这里,我们观察到了由宏观光量子态--明亮的挤压真空--驱动的固体中的非微扰高次谐波产生。与平均强度相同的经典光相比,由明亮的挤压真空驱动的过程产生高次谐波的效率要高得多。由于其广泛的光子数分布(涵盖每个脉冲从 0 到 2 × 1013 个光子的状态)和强烈的子周期电场波动,亮挤压真空可以在比经典光更宽的峰值强度范围内获得自由载流子动力学。
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来源期刊
Nature Physics
Nature Physics 物理-物理:综合
CiteScore
30.40
自引率
2.00%
发文量
349
审稿时长
4-8 weeks
期刊介绍: Nature Physics is dedicated to publishing top-tier original research in physics with a fair and rigorous review process. It provides high visibility and access to a broad readership, maintaining high standards in copy editing and production, ensuring rapid publication, and maintaining independence from academic societies and other vested interests. The journal presents two main research paper formats: Letters and Articles. Alongside primary research, Nature Physics serves as a central source for valuable information within the physics community through Review Articles, News & Views, Research Highlights covering crucial developments across the physics literature, Commentaries, Book Reviews, and Correspondence.
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