An atomic dimmer switch

Article Abstract:

Doron Meshulach and Yaron Silberberg of the Weizmann Institute have shown how by controlling the phase of light shone at atoms, they can be made to absorb light more or less readily, or not at all. They used a pulse shaper which incorporates two spectrometers arranged back to back, and the side-by-side filters attenuate or delay separate parts of the pulse spectrum.

Photonics

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A multiwavelength semiconductor laser

Article Abstract:

A multiple wavelength semiconductor laser has been developed that can emit up to three different wavelengths in the mid-infrared spectrum. Multiple wavelengths in a single artificial semiconductor material are obtained by the device, which has potential uses in applications such as trace gas analysis.

Semiconductor lasers

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