All articles tagged with #electron dynamics
Originally Published 4 months ago — by Nature
The article reports the first use of circularly polarized attosecond pulses to study and control chiral electron dynamics in molecules, revealing attosecond-scale control over photoelectron circular dichroism (PECD) and photoionization delays, with implications for understanding chiral phenomena and applications in spintronics and biosensing.
Originally Published 2 years ago — by SciTechDaily
Researchers have used intense laser fields to investigate electron dynamics in liquids, shedding light on the high-harmonic spectrum and the role of the electron's mean free path in determining photon energy limits. By studying the behavior of liquids under intense laser irradiation, the team discovered that the maximum photon energy obtained through high-harmonic generation (HHG) in liquids is independent of the laser's wavelength. They identified the electron's mean free path as the crucial factor that imposes a ceiling on photon energy and developed an analytical model to account for electron scattering. This research provides new insights into ultrafast dynamics in liquids and establishes HHG as a spectroscopic tool for studying electron behavior in this phase of matter.
Originally Published 2 years ago — by Phys.org
Researchers from Huazhong University of Science and Technology have successfully measured the speed of molecular charge migration (CM) in a carbon-chain molecule using a high harmonic spectroscopy (HHS) method. By reconstructing the CM dynamics at the most fundamental level, the team achieved a temporal resolution of 50 attoseconds and quantified the CM speed to be several angstrom per femtosecond. The study provides valuable insights into CM dynamics in molecules and opens up possibilities for manipulating chemical reactions by controlling CM speed through molecular alignment.
Originally Published 2 years ago — by SciTechDaily
An international team of researchers, led by the University of Geneva, has developed a quantum material that allows the curvature of the space inhabited by electrons to be controlled. The material, which was created using an advanced system for fabricating materials on an atomic scale, holds promise for future electronic devices, particularly in the field of optoelectronics. The researchers believe that this new material opens up new avenues in the exploration of very high-speed electromagnetic signal manipulation and can also be used to develop new sensors.