Tag Archives: andrea alu

Lighter, Cheaper Radio Wave Device Could Transform Telecommunications

AUSTIN, Texas — Researchers at the Cockrell School of Engineering at The University of Texas at Austin have achieved a milestone in modern wireless and cellular telecommunications, creating a radically smaller, more efficient radio wave circulator that could be used in cellphones and other wireless devices, as reported in the latest issue of Nature Physics. (more…)

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‘Life as Research Scientist’: Romain Fleury, Engineer

Due to deep passion for physics, Romain Fleury, after completion of his engineering diploma in France, joined the research group of Prof. Andrea Alù at the University of Texas at Austin, where he is currently pursuing a Ph.D degree. His research focuses on metamaterials, a new branch of science and technology that is making its way to maturity. To know and understand details about it and further more, let’s join our latest round of Q&A with the young and aspiring scientist – Mr. Romain Fleury:

Q. Let us start with your research topic. What is your research area? Will you please tell us a bit more on this? What did you find?

Romain Fleury: I am involved in cross-disciplinary research in the general area of wave physics and engineering. This includes electromagnetic and acoustic waves, but also other types of waves such as matter waves (the probability amplitude wave associated with a quantum particle). To be more specific, my current research mainly focuses on metamaterials, which are artificial materials that are structured and engineered to interact with waves in anomalous ways, and enable exotic physical phenomena that cannot be obtained with natural materials. For example, unlike naturally occurring materials, the refractive index of some metamaterials can take very extreme values, like zero, extremely large, or even negative. Of course, metamaterials are made of natural materials, with common properties, but it is the way we mix and structure these natural building blocks that give metamaterials their new, superior properties. Metamaterials have spectacular applications, like invisibility. Part of my research is focused on studying the potentials of metamaterials for cloaking applications. (more…)

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UT Austin Engineers Build First Nonreciprocal Acoustic Circulator: A One-Way Sound Device

AUSTIN, Texas — A team of researchers at The University of Texas at Austin’s Cockrell School of Engineering has built the first-ever circulator for sound. The team’s experiments successfully prove that the fundamental symmetry with which acoustic waves travel through air between two points in space (“if you can hear, you can also be heard”) can be broken by a compact and simple device.

“Using the proposed concept, we were able to create one-way communication for sound traveling through air,” said Andrea Alù, who led the project and is an associate professor and David & Doris Lybarger Endowed Faculty Fellow in the Cockrell School’s Department of Electrical and Computer Engineering. “Imagine being able to listen without having to worry about being heard in return.” (more…)

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