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Related Concept Videos

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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Related Experiment Video

Updated: Jun 24, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Ultrafast, reconfigurable all-optical beam steering and spatial light modulation.

Claudio U Hail1,2, Lior Michaeli1,3, Harry A Atwater4

  • 1Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, CA, USA.

Nature Nanotechnology
|June 22, 2026
PubMed
Summary
This summary is machine-generated.

Researchers achieved ultrafast light modulation using the optical Kerr effect in a dielectric metasurface. This breakthrough enables subfemtosecond, reconfigurable control of light for advanced photonic applications.

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Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Related Experiment Videos

Last Updated: Jun 24, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Area of Science:

  • Photonics
  • Metamaterials
  • Ultrafast Optics

Background:

  • Spatiotemporal light control is crucial for photonic applications.
  • Current methods rely on slow electronic transitions (picosecond response times).

Purpose of the Study:

  • To demonstrate ultrafast, reconfigurable light modulation using the optical Kerr effect in a metasurface.
  • To overcome the limitations of slow carrier relaxation in existing photonic materials.

Main Methods:

  • Utilized resonant light-matter interactions in a high-quality factor dielectric metasurface.
  • Employed all-optical tuning of the refractive index with a spatially structured pump beam.
  • Leveraged the subfemtosecond optical Kerr effect for light modulation.

Main Results:

  • Achieved pulse-limited beam steering (74-fs response time) up to ±13° in the near-infrared.
  • Demonstrated programmable deflection angles controlled by the pump beam pattern.
  • Observed phenomena including pump self-modulation, self-diffraction, and linear frequency conversion.

Conclusions:

  • The optical Kerr effect in metasurfaces enables ultrafast, reconfigurable spatial light modulation.
  • This approach offers a pathway to subwavelength and subcycle control of light.
  • Potential applications in signal processing, pulse shaping, and ultrafast imaging.