cloaking Archives | The American Ceramic Society

cloaking

Other materials stories that may be of interest

By April Gocha / March 16, 2016

Graphene-wrapped nanocrystals power fuel cells, ceramics convert wasted heat to electricity, and other materials stories that may be of interest for March 16, 2016.

Read More

Other materials stories that may be of interest (with video)

By Eileen De Guire / March 18, 2014

Other materials stories that may be of interest (with video)

Read More

Making a better invisibility cloak

By Eileen De Guire / November 16, 2012

Graduate student, Nathan Landry, seen holding his invisibility cloak made of fiberglass and copper strips. Credit: Duke University. Editor’s note—The generation that grew up reading the Harry Potter septology, grew up imagining things like invisibility cloaks as reality. The oldest of those young readers are now graduate school age and making invisibility cloaks for real.…

Read More

Other materials science stories that may be of interest

By / June 26, 2012

Check ‘ em out: Bringing down the cost of fuel cells Engineers at the University of Wisconsin-Milwaukee have identified a catalyst that provides the same level of efficiency in microbial fuel cells as the currently used platinum catalyst, but at 5% of the cost. Since more than 60% of the investment in making microbial fuel…

Read More

‘Transformation thermodynamics’ shows potential of thermal invisibility cloaking

By Eileen De Guire / March 28, 2012

The object in the center of the thermal cloak (letters OSA) stays cold, while the heat diffuses elsewhere. The source of the heat is on the left-hand side and held constant at 100°C, and the material inside the invisibility region remains cold. Credit: Sebastien Guenneau; Institut Fresnel, CNRS/AMU. Managing heat is no small issue, but so…

Read More

Two groups find cheaper, easier route to ‘cloaking’ in visible light

By / February 8, 2011

A pink object under the cloak becomes invisible. Credit: SMART Center. Last week I mentioned that someone has found a new, cheap way to optically “hide” objects (other than the metamaterials route). Via Gizmag, I heard about the the work of two groups who, in parallel, are using calcite crystals to make objects seem to disappear —…

Read More

Metamaterial discovery could improve light collection for solar cells

By / April 28, 2010

Caltech researchers, led by Harry Atwater, have engineered a type of metamaterial that allows it to bend light in part of the visible spectrum from nearly any angle toward an optimal direction. They report that this artificial optical material can handle light with any polarization over a broad range of incident angles, making it the…

Read More

Two New Approaches to Cloaking

By / April 9, 2009

Several research teams are actively pursuing cloaking/invisibility concepts. One of the prominent groups is at Duke University and the other is at University of California, Berkeley.

Read More

Video of the week – Two approaches to cloaking

By / January 21, 2009

[flash /ceramictechtoday/wp-content/video/cloaking_concepts.flv mode=1 f={image=/ceramictechtoday/wp-content/video/cloaking_concepts.jpg}]   Several research teams are actively pursuing cloaking/invisibility concepts. One of the prominent groups is at Duke University and the other is at University of California, Berkeley. The Berkeley team uses a crafted nano-prism of metamaterial atoms that has a negative refractive index for light of near-infrared wavelengths. The Duke team…

Read More

Who cloaked my cheese?

By / January 18, 2009

Back when “Ceramic Tech Weekly” was still just a newsletter (waaay back in mid-2008), I wrote several stories (see here and here) about the emerging technologies related to what is often referred to as “invisibility,” a.k.a., “cloaking” (hello Trekkies). Of course, there is a certain tendency to treat this as something of a novelty. But…

Read More