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World's water cycle becoming more unpredictable, UN warns

The planet's water cycle is becoming increasingly erratic, swinging between too little and too much, the United Nations warned Thursday, with an unprecedented El Niño expected to exacerbate the long-term trend.

World's water cycle becoming more unpredictable, UN warns

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Metasurface optical device boosts nonlinear frequency conversion

Nanostructured device efficiently transforms light into different frequencies – including those at technologically important near-infrared wavelengths The post Metasurface optical device boosts…

  • Scientists in Austria and US develop efficient light frequency conversion device
  • Metasurface and multi-quantum wells enhance nonlinear electron oscillations
  • Improves intensity and conversion rates for telecommunications and photonics

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