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Research Highlights

Published: Tue, 06/20/2017 - 3:15pm

The Kapteyn-Murnane group has come up with a novel way to use fast bursts of extreme ultraviolet light to capture how strongly electrons interact with each other in materials. This research is important for figuring out how quickly materials can change their state from insulating to conducting, or from magnetic to nonmagnetic. In the future such fast switching may lead to faster and more efficient nanoelectronics.

In this work, graduate student Cong Chen, research associate Zhensheng Tao, and their colleagues used sequences of attosecond (10-18 s) bursts of extreme ultraviolet light to compare how long it took an electron to be emitted from the same energy levels, or bands, in two different metals––copper (Cu) and nickel (Ni).

In the past, scientists thought that the photoelectric effect, in which a high-energy photon kicks out an electron from a material, was instantaneous. More recently, with the advent of shorter and shorter laser pulses, scientists have been able to investigate such super-fast processes directly. And, they have discovered many surprises. In Chen’s and Tao’s work, the researchers found that the photoelectron lifetime was 100...

Published: Jun 28, 2016

Fellow Judah Levine recently presented a discussion of our understanding of time from antiquity...

Published: Jun 02, 2016

The Kapteyn/Murnane group has measured how long it takes an electron born into an excited state...

Published: May 04, 2016

The Ye group just solved a major problem for using...

Published: Apr 21, 2016

Move over, single-atom laser cooling! The Holland theory group has just come up with a stunning...

Published: Apr 20, 2016

The old JILA molecule factory (built in 2002) produced the world’s first ultracold polar...

Published: Mar 31, 2016

The Ye and Rey groups have discovered the strange rules of quantum baseball in which strontium (...

Published: Feb 10, 2016

Cong Chen and his colleagues in the Kapteyn/Murnane group have generated one of the most complex...

Published: Jan 28, 2016

The Rey and Ye groups are in the midst of an extended collaboration on using the Ye group’s...

Published: Dec 08, 2015

In 2008, Fellow Jeff Linsky and his colleague Seth Redfield of Wesleyan University used spectral...

Published: Dec 03, 2015

Imagine laser-like x-ray beams that can “see” through materials––all the way into the heart of...

Published: Nov 30, 2015

In the future, quantum microwave networks may handle quantum information transfer via optical...

Published: Nov 06, 2015

JILA’s cold molecule collaboration (Jin and Ye Groups, with theory support from the Rey Group)...

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