Graphene allows lenses with night vision capability

The research group said they clip into graphene through the two lenses in the middle to produce a can capture any light from the visible to the infrared sensor. They have made ​​a prototype smaller than a fingernail, experts said, one day it will be embedded in the lens, night vision capability to provide soldiers and other people in need. University of Michigan Zhong Zhaohui (Zhaohui Zhong) said they tiered approach can be made ​​out of ultra-thin sensor. The associate professor of electronics and computer engineering, said: "We can make the whole design to achieve the slim effect we can put it on the lens cover, or are combined with the phone.."

Zhong Zhaohui build this prototype device has been "smaller than some of the pink fingernails," and it is easy to be scaled down. He said: "If we combine it with contact lenses or other wearable electronics, it will be able to expand your horizons as you interact with the surrounding environment provides an alternative way.." This device utilizes graphene "super sensor" feature. This material when exposed to photons (light), will be a strong influence. This will lead it into the so-called "hot carrier" scientists this effect can be measured, processed and converted into an image. The research team has discovered a new method that can graphene sandwiched between two lenses in the middle, to make it as sensitive as silicon CMOS image sensors used in commercial digital cameras.

The research group in the "Nature" magazine wrote: "The ultra-wideband photodetector, the graphene is a promising candidate material because it covers the entire infrared absorption spectrum to the far-infrared spectrum of this series we report here an ultra wideband graphene layer heterostructure photodetector design. this detector is a phototransistor, by a pair of stacked graphene monolayers composed of two separated by a tunnel junction-layer film in the optical illumination, hot carriers generated in the upper layer of the excitation light will pass through the tunnel along the lower, resulting in the charge accumulation gate, and generates the channel conductance of the strong optical selection effects. demonstration of the device at room temperature photoelectric control measure from visible to mid-infrared range. "