Scientists for first time develop laser from fluorescent jellyfish proteins
Posted on:22 Aug 2016 18:12:57
Free Current Affairs to Your Email
22 August 2016 Current Affairs: Scientists for the first time have developed LASER (light amplification by stimulated emission of radiation) from fluorescent jellyfish proteins that were grown in bacteria. The first of its kind represents a major advance breakthrough in so-called polariton lasers operating at room temperature.
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. Major difference between laser and other sources of light is that, laser emits light coherently.
Polariton laser works by passing photons back and forth between excited molecules. Unlike conventional lasers, the photons in Polariton laser are released and reabsorbed within the device itself before zooming out as laser light.
To develop the fluorescent Polariton laser, scientists had engineered barrel-shaped fluorescent proteins from jellyfish DNA. They had filled optical microcavities (between two mirrors) with this protein before subjecting them to optical pumping. Nanosecond flashes of blue light from an external laser were used to bring the system up to the required energy to create laser light. After the threshold was reached for polariton lasing, scientists pumped more energy into the device setup that resulted in conventional lasing.
Significance : These lasers have the potential to be far more efficient and compact than conventional ones. It could open up research avenues in quantum physics and optical computing. Consumes less energy compared to conventional lasers. It can be used for the purpose more efficient optical communications or in medical lasers that are less destructive to living tissue.
FreshersLive - No.1 Job site in India. Here you can find latest 2017 government as well as private job recruitment notifications for different posts vacancies in India. Get top company jobs for both fresher and experienced. Job Seekers can get useful interview tips, resume services & interview Question and answer. Practice online test free which is helpful for interview preparation. Register with us to get latest employment news/rojgar samachar notifications. Also get latest free govt and other sarkari naukri job alerts daily through E-mail.