Their technique works by using a process called two-colour holography. One wavelength of light records information on the crystal and another is used to read the data. Their method fires two light sou...
The researchers cooled the manganese oxide compound (Pr0.7Ca0.3MnO3) to below 200 K in a zero magnetic field. At this temperature the electrons drop into a low energy state, which minimizes their natu...
Recognising blood cells presents a big challenge for automated counting systems. As blood flows through veins, the cells are deformed in the direction of blood flow. Blood also contains a lot of other...
The efficiency with which light of one frequency is converted into a higher frequency in a nonlinear material increases when both frequencies travel through the material with the same phase velocity. ...
Gregory VanWiggeren and Rajarshi Roy of the Georgia Institute of Technology in the US have now used chaotic lasers to generate the complex signals of the type needed in many of today’s communica...
The growth of virtual reality has increased demand for more realistic video displays, but existing head-up display helmets are expensive and difficult to use. Gerard de Wit and Joseph Braat at Delft h...
The $40 million Magdalena Ridge Observatory will use optical interferometry to merge light signals from three new telescopes into a single image. Researchers also hope to test new adaptive optics tech...
Organic lasers are attractive for optical applications because they are inexpensive to manufacture, can be grown as thin films and have good temperature stability. Results from the Princeton team sugg...
One of the biggest changes in CAD design in the past five years is the creation of models direct from the CAD package using machine controlled tools. Recently, this design process took another leap fo...