FRAME: femtosecond videography for atomic and molecular dynamics

Andreas Ehn; Joakim Bood; Zheming Li; Edouard Berrocal; Marcus Aldén; Elias Kristensson

doi:10.1038/lsa.2017.45

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FRAME: femtosecond videography for atomic and molecular dynamics

Original Articles

- FRAME: femtosecond videography for atomic and molecular dynamics
- Light: Science & Applications Vol. 6, Issue 3, (2017)
- Affiliations：
  
  Division of Combustion Physics, Department of Physics, Lund University, Lund SE-223 63, Sweden
- Author bio：
  
  M Aldén, Email: marcus.alden@forbrf.lth.se
- Funds：
- DOI：10.1038/lsa.2017.45
  CLC：
- Published：2017-09，
  
  Published Online：15 March 2017，
  
  Received：11 October 2016，
  
  Revised：02 March 2017，
  
  Accepted：10 March 2017
- Accepted：
Scan QR Code
Ehn, A. et al. FRAME: femtosecond videography for atomic and molecular dynamics. Light: Science & Applications, 6, e17045 (2017).
DOI：

Ehn, A. et al. FRAME: femtosecond videography for atomic and molecular dynamics. Light: Science & Applications, 6, e17045 (2017). DOI： 10.1038/lsa.2017.45.

摘要

Abstract

Many important scientific questions in physics

chemistry and biology require effective methodologies to spectroscopically probe ultrafast intra- and inter-atomic/molecular dynamics. However

current methods that extend into the femtosecond regime are capable of only point measurements or single-snapshot visualizations and thus lack the capability to perform ultrafast spectroscopic videography of dynamic single events. Here we present a laser-probe-based method that enables two-dimensional videography at ultrafast timescales (femtosecond and shorter) of single

non-repetitive events. The method is based on superimposing a structural code onto the illumination to encrypt a single event

which is then deciphered in a post-processing step. This coding strategy enables laser probing with arbitrary wavelengths/bandwidths to collect signals with indiscriminate spectral information

thus allowing for ultrafast videography with full spectroscopic capability. To demonstrate the high temporal resolution of our method

we present videography of light propagation with record high 200 femtosecond temporal resolution. The method is widely applicable for studying a multitude of dynamical processes in physics

chemistry and biology over a wide range of time scales. Because the minimum frame separation (temporal resolution) is dictated by only the laser pulse duration

attosecond-laser technology may further increase video rates by several orders of magnitude.

关键词

Keywords

imaging techniquesultrafast photonicsultrafast spectroscopyvideography

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