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Microcavity lasers 'first of their kind'

A team from Switzerland have developed a laser that is smaller than the beam of energy it emits.
Researchers at ETH Zurich in Switzerland have developed possibly the world s smallest laser system.

The microcavity laser is just 30 nm but is capable of emitting at up to 200 nm and, as such, is the first laser to feature an electron cavity smaller than the beam it emits.

Optics.org reported the team behind the technology feel it has applications in a range of areas, including quantum optics studies and in radio astronomy.

"It can be made extremely small compared with the emitted wavelength and has a very flexible cavity design. We could scale the size of the cavity down even further," commented Jerome Faist from ETH s Institute for Quantum Electronics.

The breakthrough came when the researchers replaced the traditional Fabry-Perot resonators in the optical cavity with an electron resonator, enabling electronic feedback.

ETH Zurich is a research university that presently enables approximately 20,000 people from 80 nations to carry out projects in a range of scientific fields. However, its main areas of expertise are in engineering sciences and architecture, system-oriented sciences, mathematics and natural sciences.
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