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Ottawa researchers find cheaper, faster way to measure the electric field of light by Staff Writers Ottawa, Canada (SPX) Oct 19, 2020
Researchers at uOttawa have created a new method to measure the temporal evolution of electric fields with optical frequencies. The new approach, which works in ambient air, facilitates the direct measurement of the field waveform and could lead to breakthroughs in high-speed electronics. To learn more, we talked to Aleksey Korobenko, a postdoctoral fellow in the Department of Physics at the University of Ottawa, and lead author of "Femtosecond streaking in ambient air", an article recently published in the journal Optica.
Please tell us about this research project. Such a measurement was first achieved using a technique called attosecond streaking - a generalization of the long-known conventional streak camera. When irradiated with a short electromagnetic pulse, the gas molecules give up their electrons that continue their motion, experiencing the pull from the field of a second, "streaking," pulse. Measuring the velocity that the electrons acquire due to this pull allows one to reconstruct the streaking pulse on attosecond time scales."
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How was this research conducted?
Is there anything you'd like to add? The research was conducted in the Joint Attosecond Science Laboratory, which is jointly operated by the University of Ottawa and the National Research Council."
Physicists conduct controlled transport of stored light experiment Mainz, Germany (SPX) Oct 14, 2020 A team of physicists led by Professor Patrick Windpassinger at Johannes Gutenberg University Mainz (JGU) has successfully transported light stored in a quantum memory over a distance of 1.2 millimeters. They have demonstrated that the controlled transport process and its dynamics has only little impact on the properties of the stored light. The researchers used ultra-cold rubidium-87 atoms as a storage medium for the light as to achieve a high level of storage efficiency and a long lifetime. ... read more
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