Nanoscale lasers were given a thought to be used in computing but there were hurdles in their practical use. Now researchers have removed the hurdles and have given the green signal for its use in the optical communications and computing. The study was carried out at the University of North Carolina where the first semiconductor nanolaser was shown that can operate at the room temperature.
Traditional lasers in use today amplify the light but these nanolaser plasmons will amplify the particles that will be capable of doing what the photons in natural light cannot do. It is impossible to confine the photons in an area which is less than half of their wavelength and it limits the miniaturization of the optical devices. But the plasmons can be broken into much small pieces or parts and can be converted to smaller conventional light waves. They can then be more useful for ultra high resolution imaging required for various purposes.
The spaser uses semiconductors and metals that have long been known for their resilience but the spasers that were created in the past lost too much energy and could not be used until they were cooled down up to -250°C. Sustained lasing can be achieved in the calcium sulfide cavity and can be used for biological tests and molecule detection.
The researchers say that the practical device may be available in a few years and are trying to couple the light output to make it usable for communication and optical computing. If the research is successful then this spaser could be used making of microchips and to store more data on the CDs, DVDs and HDDs.