To help develop a handheld electron beam-pumped semiconductor laser
that would be the first to operate in the ultraviolet, Boston University professor
Theodore Moustakas has received a $1.5 million, two-year subcontract from DARPA.
Because of the laser’s ultralow emission wavelength and compact size, it could
be exploited for a wide range of applications, including identification of biological
and chemical substances used in potential terror attacks, and in point-of-care chemical
analysis of blood and other bodily fluids. To develop the technology, Moustakas,
a member of the university’s electrical and computer engineering department,
and his co-investigators will fabricate UV laser materials and component devices.
They plan to make a laser structure that, when bombarded with an electron beam,
produces pairs of electrons and holes (positively charged particles) that recombine
and produce the UV light.
- quantum dots
- Also known as QDs. Nanocrystals of semiconductor materials that fluoresce when excited by external light sources, primarily in narrow visible and near-infrared regions; they are commonly used as alternatives to organic dyes.
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