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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...

Published: Nov 02, 2015

The Regal and Rey groups have come up with a novel way to generate and propagate quantum...

Published: Oct 21, 2015

Scientists often use ultracold atoms to study the behavior of atoms and electrons in solids and...

Published: Oct 16, 2015

Fellow Phil Armitage and his collaborator Jake Simon of the Southwest Research Institute...

Published: Oct 16, 2015

The Perkins Group has demonstrated a 50-to-100 times improvement in the time resolution for...

Published: Oct 05, 2015

It took Eric Cornell three years to build JILA’s first Top Trap with his own two hands in the...

Published: Sep 21, 2015

The Kapteyn/Murnane group, with Visiting Fellow Charles Durfee, has figured out how to use...

Published: Aug 19, 2015

Graduate student Brian Lester of the Regal group has taken an important step toward building...

Published: Aug 14, 2015

Ever wondered how magnetic pressure alone might be able to maintain the structure of an...

Published: Aug 10, 2015

Compact and transportable optical lattices are coming soon to a laboratory near you, thanks to...

Published: Aug 06, 2015

When an ordinary star like our Sun wanders very close to a supermassive black hole, it’s very...

Published: Jul 16, 2015

For astrophysicists like Fellow Jeff Linsky, the Lyman-α spectral line of atomic hydrogen is a...

Published: Jul 01, 2015

A grand challenge of ultracold physics is figuring out how fermions become bosons. This is an...

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