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All-optical subcycle microscopy on atomic length scales.

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  • 1Department of Physics and Regensburg Center for Ultrafast Nanoscopy (RUN), University of Regensburg, Regensburg, Germany.

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This summary is machine-generated.

Researchers developed a new optical microscopy technique achieving picometric spatial and femtosecond temporal resolution. This breakthrough allows direct observation of quantum light-matter interactions and electronic dynamics at the atomic level.

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Area of Science:

  • Condensed matter physics
  • Quantum optics
  • Nanotechnology

Background:

  • Optical microscopy aims to achieve atomic resolution for studying nanoscale dynamics.
  • Super-resolution and near-field microscopy have improved resolution but are limited by tip size.
  • Understanding quantum light-matter interactions requires tools with ultimate spatio-temporal precision.

Purpose of the Study:

  • To develop an all-optical microscopy technique with picometric spatial and femtosecond temporal resolution.
  • To explore extreme atomic nonlinearities for enhanced imaging capabilities.
  • To enable direct monitoring of ultrafast electronic dynamics at the atomic scale.

Main Methods:

  • Leveraging extreme atomic nonlinearities within tip-confined evanescent fields.
  • Utilizing a non-classical near-field response with a specific optical phase delay.
  • Applying the technique to image nanoscale defects and sample current transients.

Main Results:

  • Achieved picometric spatial and femtosecond temporal resolution in optical microscopy.
  • Discovered an efficient, non-classical near-field response confined to atomic dimensions.
  • Successfully imaged defects invisible to atomic force microscopy and sampled ultrafast current transients.

Conclusions:

  • The developed technique pushes optical microscopy to unprecedented spatio-temporal scales.
  • Enables direct access to quantum light-matter interactions and electronic dynamics in quantum materials.
  • Opens new avenues for investigating nanoscale phenomena in both conductive and insulating materials.