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Physicists Mix Two Lasers to Create Light at 11 New Frequencies
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UCSB Press Release: "UCSB Physicists Mix Two Lasers to Create Light at Many Frequencies " [by Ripping Electrons from Their Cores]
Quote:
–– A team of physicists at UC Santa Barbara has seen the light, and it comes in many different colors. By aiming high- and low-frequency laser beams at a semiconductor, the researchers caused electrons to be ripped from their cores, accelerated, and then smashed back into the cores they left behind. This recollision produced multiple frequencies of light simultaneously. Their findings appear in the current issue of the science journal Nature
Link to 3Mb Hi Res Image
Quote:
The researchers utilize a free electron laser –– a building-size machine in UCSB's Broida Hall –– to produce the electron-hole recollisions
Quote:
"This is a very remarkable phenomenon. I have never seen anything like this before," said Mark Sherwin, whose research group made the groundbreaking discovery. Sherwin is a professor of physics at UCSB and a co-author of the paper. He is also director of the campus's Institute for Terahertz Science and Technology.
Quote:
"It's fairly routine to mix the lasers and get one or two new frequencies, Sherwin continued. "But to see all these different new frequencies, up to 11 in our experiment, is the exciting phenomenon. Each frequency corresponds to a different color."
Click for downloadable image of Benjamin Zaks (left) and Mark Sherwin
________________________________________
UCSB Press Release: "UCSB Physicists Mix Two Lasers to Create Light at Many Frequencies " [by Ripping Electrons from Their Cores]
Quote:
–– A team of physicists at UC Santa Barbara has seen the light, and it comes in many different colors. By aiming high- and low-frequency laser beams at a semiconductor, the researchers caused electrons to be ripped from their cores, accelerated, and then smashed back into the cores they left behind. This recollision produced multiple frequencies of light simultaneously. Their findings appear in the current issue of the science journal Nature
Link to 3Mb Hi Res Image
Quote:
The researchers utilize a free electron laser –– a building-size machine in UCSB's Broida Hall –– to produce the electron-hole recollisions
Quote:
"This is a very remarkable phenomenon. I have never seen anything like this before," said Mark Sherwin, whose research group made the groundbreaking discovery. Sherwin is a professor of physics at UCSB and a co-author of the paper. He is also director of the campus's Institute for Terahertz Science and Technology.
Quote:
"It's fairly routine to mix the lasers and get one or two new frequencies, Sherwin continued. "But to see all these different new frequencies, up to 11 in our experiment, is the exciting phenomenon. Each frequency corresponds to a different color."
Click for downloadable image of Benjamin Zaks (left) and Mark Sherwin
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