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Related Experiment Video

Updated: May 7, 2026

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Demonstration of temporal cloaking.

Moti Fridman1, Alessandro Farsi, Yoshitomo Okawachi

  • 1School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.

Nature
|January 7, 2012
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate temporal cloaking, hiding events in time by manipulating light dispersion. This breakthrough in optical fiber systems reduces event amplitude by over 10x, paving the way for full spatio-temporal cloaking.

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Area of Science:

  • Physics
  • Optics
  • Electromagnetism

Background:

  • Spatial cloaking manipulates refractive index to hide objects.
  • Temporal cloaking aims to hide events within a 'time hole' in light beams.
  • This relies on manipulating material dispersion over time.

Purpose of the Study:

  • To experimentally demonstrate temporal cloaking in an optical fiber system.
  • To apply space-time duality concepts between diffraction and dispersive broadening.
  • To characterize the performance of the temporal cloak.

Main Methods:

  • Utilized an optical fiber system to manipulate light beam dispersion.
  • Accelerated the front and slowed the rear of a probe light beam to create a temporal gap.
  • Applied space-time duality principles to control temporal dispersion.

Main Results:

  • Successfully demonstrated temporal cloaking by creating a 'time hole'.
  • Reduced the amplitude of a picosecond-timescale event by over an order of magnitude when the cloak was active.
  • Showcased the spectral modification of a probe beam due to an optical interaction.

Conclusions:

  • The experimental demonstration is a significant step towards full spatio-temporal cloaking.
  • The results validate the concept of manipulating dispersion for temporal cloaking.
  • This research opens avenues for controlling events in time using optical methods.