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Nobel Prize for Physics

Winners include first woman in 55 years

AFP, Stockholm
Three scientists yesterday won the Nobel Physics Prize, including the first woman in 55 years, for inventing optical lasers that have paved the way for advanced precision instruments used in corrective eye surgery, the jury said.
Arthur Ashkin of the United States won one half of the nine million Swedish kronor (about $ 1.01 million or 870,000 euros) prize, while Gerard Mourou of France and Donna Strickland of Canada shared the otherhalf.
Strickland is just the third woman to win
a Nobel Physics Prize since it was first awarded in 1901, while Ashkin, 96, is the oldest person to win a Nobel, beating out American Leonid Hurwicz who was 90 when he won the 2007 Economics Prize.
Ashkin was honoured for his invention of "optical tweezers" that grab particles, atoms, viruses and other living cells with their laser beam fingers.
With this he was able to use the radiation pressure of light to move physical objects, "an old dream of science fiction," the Royal Swedish Academy of Sciences said.
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A major breakthrough came in 1987 when Ashkin used the tweezers to capture living bacteria without harming them, the Academy noted.
Ashkin made his discovery while working at AT&T Bell Laboratories from 1952 to 1991.
Meanwhile Mourou, 74, and Strickland won for helping develop a method to generate ultra-short optical pulses, "the shortest and most intense laser pulses ever created by mankind," the jury said.
Their technique is now used in correctiveeyesurgery.
Mourou was affiliated with the Ecole Polytechnique of France and the University of Michigan in the US, while Strickland, his student, is a professor at
the University ofWaterloo in Canada.
Mourou was also involved in building the Extreme Light Infrastructure (ELI) project and what is believed to be one of the world's most powerful lasers, the Apollon, in developments that researchers hope will one day help deal with nuclear waste, treating tumours and clearing debris in space.
WOMEN ARE 'OUTTHERE'
Speaking by phone to the Academy, a moved Strickland said she was thrilled to receive the Nobel prize that has been the least accessible forwomen.
"We need to celebrate women physicists because they're out there... I'm honoured to be one of those women."
Before her, only Marie Curie and Maria Goeppert Mayer had won the physics prize, in 1903 and 1963 respec-
tively.
The Royal Swedish Academy of Sciences has in the past lamented the small number of women laureates in the science fields in general.
It has insisted that it is not due to male chauvinism bias on the award committees, instead attributing it to the fact that laboratory doors were closed to women for so long.
"It's a small percentage for sure, that's why we are taking measures to encourage more nominations because we don't want to miss anyone," the head of the Academy, Goran Hansson, said yesterday.
Last year, US astrophysicists Barry Barish, Kip Thome and Rainer Weiss won the physics prize for the discovery of gravitational waves, predicted by
Albert Einstein a century ago as part of his theory of general relativity.
On Monday, two immunologists, James Allison of the US and Tasuku Honjo of Japan, won this year's Nobel Medicine Prize for research into how the body's natural defences can fight cancer.
The winners of the chemistry prize will be announced today, followed by the peace prize on Friday. The economics prize will wrap up the Nobel season on Monday, October 8.
For the first time since 1949, the Swedish Academy has postponed the announcement of the 2018 Nobel Literature Prize until next year, amid a #MeToo scandal and bitter internal dispute that has prevented it from ftmc-tioningproperly.