A laser with a 67-attosecond pulse has been created. Free Technical Library News

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Created a laser with a 67-attosecond pulse

17.09.2012

A group of researchers from the University of Central Florida received the world's shortest laser pulse. In doing so, it may have given scientists a new tool for seeing quantum mechanics in action. This discovery was the first significant breakthrough in the field of laser pulses in the last four years.

Professor Chang of the Department of Physics and the College of Optics and Photonics and his team have achieved a 67-attosecond laser pulse of hard ultraviolet radiation. The results of their research are published in the journal Optics Letters.

An attosecond is an unimaginably small amount of time. In other words, within one second, 15 million billion pulses, such as those of Chang's team, could be sequentially generated. The achievement is all the more remarkable because no specialized equipment was used. Zhang and his colleagues created the so-called. double optical grating (DOG) method, which cuts off ultraviolet radiation in such a way as to concentrate the maximum radiation in the shortest pulse of light. In addition to the light pulse itself, scientists have also developed ultra-fast cameras to measure it.

"Dr. Chang's success in creating ever shorter light pulses will help open the door to a previously hidden world where we can observe the movement of electrons in atoms and molecules, follow chemical reactions," said Michael Johnson, dean of the UCF College of Science. but now we can see quantum mechanics in action."

The desire to obtain ever shorter light pulses has been going on since the invention of the laser for more than fifty years. For the first time, attosecond pulses were demonstrated only in 2001. Since then, scientists around the world have been trying to achieve shorter and shorter pulses to better understand the subatomic world. The previous record - an impulse of 80 attoseconds - was achieved in 2008 at the Max Planck Institute in Haarlem, Germany.

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