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Related Experiment Video

Updated: Jan 8, 2026

$Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing$

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing

Published on: April 25, 2019

Attosecond physics in optical near fields.

Jonas Heimerl¹, Stefan Meier¹, Anne Herzig²

¹Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany.

|December 15, 2025

Summary

This summary is machine-generated.

Researchers reveal low-energy stripes in electron spectra from nanostructures, enabling precise control over attosecond electron bursts for future petahertz electronics.

Keywords:

Nanophotonics and plasmonics Nonlinear optics

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Published on: January 19, 2018

Area of Science:

Attosecond science and petahertz electronics
Quantum dynamics of electrons in optical near fields

Background:

Attosecond science, controlling electrons with ultrashort laser pulses, is evolving into petahertz electronics.
Optical-field-driven nanostructures are key components for petahertz electronics, requiring a deep understanding of electron dynamics in optical near fields.

Purpose of the Study:

To investigate near-field-induced spectral features in electron emissions from driven nanostructures.
To understand the subcycle dynamics of electrons in strong optical near-field gradients.

Main Methods:

Analysis of carrier-envelope-phase-dependent electron spectra from strongly driven nanostructures.
Investigating electron dynamics using few-cycle optical waveforms and strong near-field gradients.

Main Results:

Observation of near-field-induced low-energy stripes in electron spectra.
Demonstration of subcycle sensitivity in ponderomotive acceleration.
Access to electron momentum width at emission and tracking of electron emissions on subcycle timescales.

Conclusions:

The observed stripes provide insights into electron dynamics and enable tracking of electron emissions.
The effect allows for steering of direct electron signals, facilitating isolation of high-charge-density attosecond electron bursts.
This work paves the way for developing elements for lightfield-driven petahertz electronics.