Super thin film can help the laser eye

Lasers developed by the research team at St Andrews University can be used for security checks.

Scientists at the University of St Andrews, Scotland, built a millimeter thick that could be attached to contact lenses, Newsweek reported Monday. This membrane allows the user to shoot a laser beam from the eye.

The film is made of an organic semiconductor polymer. It emits very weak laser light when another laser is shining in. Each membrane can produce a unique bar code in the form of slender lines on the plane.

The team hopes the new technology brings many useful applications. Membrane can be used to identify as a type of security stamp. This small and lightweight item can also be attached to other items such as polymer money, counterfeit money, even as an explosive detector.

In a study published in the journal Nature Communications, the team described the membrane and demonstrated its ability to emit a laser by attaching it to contact lenses and placing it on the eye, often used in experiments because of many similarities. self-eye As a result, the membrane is safe if used on humans.

"Our research marks a new milestone in the development of lasers, particularly that lasers can be used in soft environments, in human sensors, or used as authenticity on money." paper, " said Malte Gather, professor of physics at St Andrews University.