用超光速电离锋控制激光在空气中产生太赫兹辐射。

IF 9 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Physical review letters Pub Date : 2025-01-31 DOI:10.1103/PhysRevLett.134.045001

Silin Fu, Baptiste Groussin, Yi Liu, André Mysyrowicz, Vladimir Tikhonchuk, Aurélien Houard

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引用次数: 0

摘要

我们证明了由聚焦的超短激光脉冲在空气中产生的脉冲太赫兹辐射可以被引导到大角度，甚至在相对于激光传播轴的反向方向。通过飞焦技术调整发射角度，决定单色激光脉冲产生电离锋的速度和方向。这种易于调节的太赫兹源，与强激光很好地分离，为远程太赫兹光谱学开辟了令人兴奋的应用。

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Steering Laser-Produced THz Radiation in Air with Superluminal Ionization Fronts.

We demonstrate that pulsed THz radiation produced in air by a focused ultrashort laser pulse can be steered to large angles or even in the backward direction with respect to the laser propagation axis. The emission angle is adjusted by the flying focus technique, which determines the speed and direction of the ionization front created by the single-color laser pulse. This easily adjustable THz source, being well separated from the intense laser, opens exciting applications for remote THz spectroscopy.

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来源期刊

Physical review letters 物理-物理：综合

CiteScore

16.50

自引率

7.00%

发文量

2673

审稿时长

2.2 months

期刊介绍： Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks

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