突然自聚焦波进入时空域
Abruptly autofocusing waves enter space-time
AI总结：
曹等人通过实验合成球形艾里波包，首次实现从（2+1）维空间自聚焦到全时空域的转变，为超快结构化光等领域开辟了新机遇。
AI中文摘要：
传统高斯聚焦会将光能逐渐集中在焦平面附近，而突然自聚焦波在其大部分演化过程中保持较低的峰值强度，仅在预定焦点处发生突然、高对比度的强度激增。自2010年被提出以来，其二维空间实现已应用于粒子操纵、材料加工、太赫兹产生及非线性光学等领域。曹等人近期的工作通过实验合成球形艾里波包，实现了从（2+1）维空间自聚焦到全时空域的转变，这一进展为超快结构化光、紧密局域化能量传输及非线性光子学开辟了新机遇。
英文摘要：
Whereas conventional Gaussian focusing gradually concentrates optical energy around the focal plane, abruptly autofocusing waves maintain a low peak intensity over most of their evolution before undergoing a sudden, high-contrast intensity surge at a prescribed focus. Since their introduction in 2010, their two-dimensional spatial realizations have enabled applications ranging from particle manipulation and material processing to terahertz generation and nonlinear optics. The recent work of Cao et al. marks the transition from (2+1)-dimensional spatial autofocusing to the full space-time domain through the experimental synthesis of spherical Airy wavepackets. This advance opens new opportunities for ultrafast structured light, tightly localized energy delivery, and nonlinear photonics.
