New Ultra-thin Flexible Green Laser Pointer Film
Green laser pointer is emitted from the eyes like "Superman". The "superpower" in science fiction movies has taken a step towards reality. British researchers have developed an ultra-thin flexible laser film that can be attached to the surface of optical components such as contact lenses as a unique identification mark for security verification. In recent years, with the rapid development of flexible electronic technology, organic semiconductor materials have gained broad application prospects in the fields of flexible wearable devices, biomedicine, etc. due to their ductility and good stretchability. A research team at the University of St Andrews in the United Kingdom made flexible thin-film lasers using organic semiconductor polymers. The thickness is only 200 nanometers, and the polymer can emit green laser pointer when stimulated by the light source.
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The researchers said that if the material of the film is changed, the grid beam of the green laser pointer is adjusted. The emitted laser shows a specific series of lines on a flat background. Similar to a 0 and 1 barcode, this gives a unique security identification that can be read by a security scanner. Research director Mart Gart said the laser film can be attached to different surfaces like ultra-thin stickers, such as banknotes. Experiments have proved that this flexible laser film has not only good elasticity, but also stable optical properties, which is suitable for anti-counterfeiting of banknotes. Researchers attached ultra-thin laser films to the surface of contact lenses and experimented with bull's eyes under the excitation of pulsed blue light. The green laser beam from the film was successfully projected onto a screen about 50 cm away. They also affixed a green laser pointers film to their nails, confirming their applicability to biometrics.
2019-12-26 11:47:17
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