ElectronsParticle physicsFirst page of articledoi:10.1002/scin.5591770719Charles PetitJohn Wiley & Sons, Ltd.Science News
High harmonic generation provides a means of producing attosecond pulses of light which are the shortest, controllable probes available to science for time-resolving ultrafast dynamics. We review techniques based on high harmonic generation for generating single attosecond pulses using high-power, multi-...
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Within atoms and molecules, electrons zip around at extreme speeds. Capturing their to-and-fro is only possible with pulses of light that are extremely short. Attosecond laser is akin to a camera flash that lasts billions of billions of times briefer than a second. When viewed in such short ...
When an atom or molecule absorbs a photon of light, it can emit an electron in a process known as the photoelectric effect. Einstein's description of the photoelectric effect, also known as photoionization, laid the theoretical foundation for quantum mechanics. However, the instantaneous nature of...
a, Vector potentials of the laser pulses in our calculations. The wavelength and the intensity of the IR field are 800 nm and 5.88 × 1013W/cm2. The centre frequency of XUV pulse is ωXUV=2 a.u., and its intensity is 1 × 1013W/cm2. b c, Photoelectron energy spectra ...
Photoelectron quantum-state tomography is demonstrated in helium and argon atoms upon the absorption of ultrashort, extreme ultraviolet light pulses. The purity and degree of entanglement of a mixed photoelectron and ion state are quantified following coherent two-photon ionizati...
Baltuska, A. et al. Attosecond control of electronic processes by intense light fields.Nature421, 611–615 (2003). ADSGoogle Scholar Yakovlev, V. S. & Scrinzi, A. High harmonic imaging of few-cycle laser pulses.Phys. Rev. Lett.91, 153901 (2003). ...
压力可能与后工业社会快节奏的生活有关,但是身体的压力反应系统自古便已存在。 ParaCrawl Corpus These special lasers are used to generate light pulses in the attosecond range, for example. 这些特殊激光器主要用于产生阿秒级光脉冲。 ParaCrawl Corpus ...
Attosecond light pulses in the extreme ultraviolet have drawn a great deal of attention due to their ability to interrogate electronic dynamics in real time. Nevertheless, to follow charge dynamics and excitations in materials, element selectivity is a prerequisite, which demands such pulses in the ...