• The researchers demonstrate a new approach for generating terahertz waves using intense laser pulses in air that could potentially be improved for applications in the monitoring of explosives or drugs.
  • Until now, approaches to use a plasma as a broadband source of terahertz have commonly used an elongated plasma generated by combining together two laser beams of different frequencies, i.e., colors.
  • An advantage of this "one-color" approach to generating terahertz radiation is the fact that the terahertz waves propagate in a different direction to the laser beam. This makes it easier for potentially coupling the terahertz waves to a wave guide on a microchip, for example.

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