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The Light Fantastic
Article

The Light Fantastic

Physicists in China and elsewhere are vying to build lasers so powerful they could rip apart empty space

Science, 2018

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Editorial Rating

8

Qualities

  • Scientific
  • Overview
  • Background

Recommendation

New lasers have arrived which can exert power at the level of petawatts (PW) – millions of a billion watts. All power grids combined achieve only hundredths of that power. To yield such immense power, however, the pulses produced by these table-top lasers need to be very short. Physicists now attempt durations as short as femtoseconds – millionths of a billionth of a second. Edwin Cartlidge paints a fascinating picture of the development of lasers, the challenges in reaching PW levels, and the ways forward to ever more capable lasers that will open up new possibilities in scientific research and medicine.

Take-Aways

  • Scientists in China, Europe and Japan are constructing ever more powerful lasers.
  • The key to achieving extreme power is limiting laser pulses to extremely brief durations.
  • A new generation of lasers could enable novel applications in high energy physics and nuclear medicine.

About the Author

Edwin Cartlidge is a freelance science journalist based in Rome.


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