The rise of the laser pixels

This article posted on physorg.com describes the work of Cambridge physicists who are developing a new class of microscopic lasing devices using chiral nematic liquid crystals as the lasing medium. The most interesting aspect of this new laser technology is that the frequency of the light emitted can be tuned dynamically by altering the periodicity of the molecular orientation of the liquid crystal medium, for example with a local electric field, as in current liquid crystal displays.