Probing strong-field QED with Doppler-boosted PetaWatt-class lasers

在等离子体镜上生成和控制多普勒谐波，其强度接近10^22 W/cm²

Fundamental limit of intensity scaling for harmonic generation on plasma mirrors

利用皮瓦特级激光器在等离子体镜上实现接近10^22 W/cm²的多普勒谐波生成，强调了亚皮秒时间尺度上激光对比度控制对高阶谐波生成的重要性。

Coherent keV backscattering from plasma-wave boosted relativistic electron mirrors

A new parameter regime of laser wakefield acceleration driven by sub-petawatt femotsecond lasers is proposed, which enables the generation of relativistic electron mirrors further accelerated by the plasma wave. Integrated particle-in-cell simulation including the mirror formation and Thomson scattering demonstrates that efficient coherent backscattering up to keV photon energy can be obtained with moderate driver laser intensities and high density gas targets.

Light-Matter Interaction Near the Schwinger Limit Using Tightly Focused Doppler-Boosted Lasers

The Schwinger limit could be approached by focusing to its diffraction limit the light reflected by a plasma mirror irradiated by a multi-petawatt laser. We explore numerically the interaction between such intense light and matter. We find that the interaction with a relativistic counterpropagative electron beam would enable the exploration of the fully nonperturbative regime of strong-field quantum electrodynamics (SF-QED), while the interaction with an initially solid target leads to a profusion of SF-QED effects that retroact on the laser-plasma interaction. We observe in both scenarios the…

Probing Space-time Distortion with Laser Wake Field Acceleration and X-ray Free Electron Lasers

Petawatt class femtosecond lasers and x-ray free electron lasers (XFEL) open up a new page in research fields related to space and vacuum physics. One of fundamental principles can be explored by these new instruments is the equivalence principle, saying that gravitation and acceleration should be treated equivalently. If it is true this must lead to the appearance of the Unruh effect analogous to Hawking's black hole radiation. It says that a detector moving with a constant acceleration $w$ sees a boson's thermal bath with its temperature $T_w=\hbar w/2πk_B c$. Practical detection of the Unru…

Quantum vacuum processes in the extremely intense light of relativistic plasma mirror sources

The advent of Petawatt-class laser systems allows generating electro-magnetic fields of unprecedented strength in a controlled environment, driving increasingly more efforts to probe yet unobserved processes through their interaction with the quantum vacuum. Still, the lowest intensity scale governing these effects lies orders of magnitude beyond foreseen capabilities, so that such endeavor is expected to remain extremely challenging. In recent years, however, plasma mirrors have emerged as a promising bridge across this gap, by enabling the conversion of intense infrared laser pulses into coh…