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Volume 16 Issue 2, February 2022

Mie scattering and chirality

The news that third-harmonic Mie scattering from nanoscale helices of cadmium telluride is strongly influenced by the chirality of the scatterers opens new opportunities for high-throughput analysis of chiral compounds using very small sample volumes.

See Ohnoutek et al. and Kivshar

Image: Ventsislav Valev and Lukas Ohnoutek at University of Bath and Kylian Valev at St Gregory's. Cover Design: Bethany Vukomanovic

News & Views

  • Nanoscale helix-shaped structures of CdTe are shown to exhibit strong nonlinear chiral effects that could prove useful for high-throughput chemical analysis.

    • Yuri Kivshar
    News & Views


  • An off-the-shelf silicon image sensor can directly record few-cycle optical waveforms in the mid-infrared in a single shot by employing tunnelling ionization as a temporal gate.

    • Mostafa Shalaby
    News & Views
  • Researchers reveal an effect in random media, called coherent back-emission, in which directional memory of the incoming light field persists after incident radiation ceases to be present.

    • Frank Scheffold
    • Luis S. Froufe-Pérez
    News & Views
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Review Articles

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  • Waveforms of mid-infrared few-cycle optical pulses are captured in a single shot by measuring nonlinear photocurrents in a Si-based image sensor chip. The temporal resolution of waveforms is determined by the spatial resolution of the image sensor.

    • Yangyang Liu
    • John E. Beetar
    • Michael Chini
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Amendments & Corrections

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