Navigation Links
Penn metamaterials experts show a way to reduce electrons' effective mass to nearly 0
Date:12/18/2012

PHILADELPHIA The field of metamaterials involves augmenting materials with specially designed patterns, enabling those materials to manipulate electromagnetic waves and fields in previously impossible ways. Now, researchers from the University of Pennsylvania have come up with a theory for moving this phenomenon onto the quantum scale, laying out blueprints for materials where electrons have nearly zero effective mass.

Such materials could make for faster circuits with novel properties.

The work was conducted by Nader Engheta, the H. Nedwill Ramsey Professor of Electrical and Systems Engineering in Penn's School of Engineering and Applied Science, and Mario G. Silveirinha, who was a visiting scholar at the Engineering School when their collaboration began. He is currently an associate professor at the University of Coimbra, Portugal.

Their paper was published in the journal Physical Review B: Rapid Communications.

Their idea was born out of the similarities and analogies between the mathematics that govern electromagnetic waves Maxwell's Equations and those that govern the quantum mechanics of electrons Schrdinger's Equations.

On the electromagnetic side, inspiration came from work the two researchers had done on metamaterials that manipulate permittivity, a trait of materials related to their reaction to electric fields. They theorized that, by alternating between thin layers of materials with positive and negative permittivity, they could construct a bulk metamaterial with an effective permittivity at or near zero. Critically, this property is only achieved when an electromagnetic wave passes through the layers head on, against the grain of the stack. This directional dependence, known as anisotropy, has practical applications.

The researchers saw parallels between this phenomenon and the electron transport behavior demonstrated in Leo Esaki's Nobel Prize-winning work on superlattices
'/>"/>

Contact: Evan Lerner
elerner@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. First 3-D nanoscale optical cavities from metamaterials
2. Metamaterials, quantum dots show promise for new technologies
3. Topological transitions in metamaterials
4. Metamaterials may advance with new femtosecond laser technique
5. The Medzilla Employment Report for December, 2012: Unemployment Drops to Lowest Rate in 4 Years; Experts Predict Unprecedented Growth in Healthcare IT
6. CoreLab Partners, Medical Image Assessment Experts, Announces Its Entry Into the Early Alzheimers Imaging Market Space
7. No on Prop. 37: French Rat Study Author Made Reporters Sign Confidentiality Agreements Prohibiting them from Consulting Independent Scientific Experts
8. Northwestern University Joins VIVO Network with Elseviers SciVal Experts
9. UMass Amherst, Harvard experts say better systems needed for medical device cybersecurity
10. Maths experts question key ecological theory
11. TAKE Solutions Brings Together Leading Experts and TAKE Customers at “Converge 2012” to Discuss Business
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/22/2014)... 2014 Involution Studios , a ... a new infographic, Understanding Ebola . The ... designed, easy to follow informative tool for anyone wanting ... symptoms and prevention. , "As the news has spread ... Ebola outbreak represents not only a healthcare crisis with ...
(Date:10/22/2014)... SC (PRWEB) October 22, 2014 ... of its cardiovascular pharmacogenetics menu, which enables healthcare ... outcomes. With PCLS’s evidence-based results, healthcare providers ... and optimize their therapy, while minimizing risks for ... the U.S., according to the FDA [1] more ...
(Date:10/22/2014)... Nuvilex, Inc. (OTCQB: NVLX) – According to ... are living with diabetes, with  that number expected to ... market for diabetes treatments is approximately $500 billion.  ... from pancreatic cancer.  Pancreatic cancer is the fourth most ... the United States , and according to ...
(Date:10/20/2014)... , Oct. 20, 2014 Mapp ... experimental ZMapp™ antibody therapeutic to fight the Ebola ... difficult and time-consuming the production of pharmaceuticals can ... research publisher said that while some may be ... this compound, those with industry knowledge are well ...
Breaking Biology Technology:Involution Studios' Ebola Infographic Provides Key Disease Information and Statistics at a Glance 2PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 2PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 3Nuvilex Brief Analyst Report: Thinking Outside the Box by BrokerBank Securities, Inc. 2Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 2Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 3
... The Wisconsin Alumni Research Foundation ( WARF ) and ... nutritional supplement manufacturer today with willful and deliberate patent ... , ,The French company, Arkopharma , and its ... the suit when they continued to sell certain products ...
... - The growing body of university research under development beyond ... grow at an even faster pace as the result of ... System presidents and the Wisconsin Alumni Research Foundation. ... for researchers at UW System schools. The focus, however, extends ...
... Lee Dreyfus made a few waves when he suggested ... blue-eyed Arabs of the Upper Midwest" by selling fresh ... many of his ideas, often delivered off-the-cuff to mask ... Dreyfus proposal simultaneously stirred the imagination and set off ...
Cached Biology Technology:WARF sues French company over patent violation 2WiSys to distribute $1 million in research funds 2WiSys to distribute $1 million in research funds 3WiSys to distribute $1 million in research funds 4Fresh water could be a deep economic wellspring for Wisconsin 2Fresh water could be a deep economic wellspring for Wisconsin 3
(Date:10/14/2014)... Ohio (Oct. 14, 2014)—It,s been millions of years since ... a team led by Ohio University scientists is breathing ... model airflow through dinosaur snouts. The research has important ... only breathe but to enhance the sense of smell ... ,nosy, animals," said Ohio University doctoral student Jason Bourke, ...
(Date:10/14/2014)... kind of stem cell that can become either a liver ... to a study published today in the journal Stem ... contradicts current theory on how organs arise from cell layers ... and future treatment for, liver cancer., Thanks to stem cells, ... made up of more than 200 cell types. The original, ...
(Date:10/14/2014)... team of scientists led by researchers at the ... University of Miami Miller School of Medicine (UMMSM) ... pathway underlying bipolar (manic depressive) disorder, a breakthrough ... bipolar affective disorder, as well as depression and ... published online this week in Nature Molecular ...
Breaking Biology News(10 mins):Dinosaur breathing study shows that noses enhanced smelling and cooled brain 2Dinosaur breathing study shows that noses enhanced smelling and cooled brain 3Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 2Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 3Rare genetic disease protects against bipolar disorder 2Rare genetic disease protects against bipolar disorder 3
... known PSA blood test for prostate cancer in men may ... breast cancer, the most common form of cancer in women ... ACS journal Analytical Chemistry . Chien Chou and ... test also is a potential biomarker of breast cancer in ...
... is available in German and Spanish . ... Chile pose a higher threat to its neighbour, Argentina, than ... of Concepcin in Chile and the Helmholtz Centre for Environmental ... particular, 22 non-native species which occur in Chile on connecting ...
... has shown that light is the key to getting our ... exploring the resynchronisation mechanism in insects has discovered a molecule ... University of London looked at the impact of light on ... flies. They identified a novel molecule, QUASIMODO (QSM), which was ...
Cached Biology News:Chile is more dangerous for Argentina than vice versa 2Chile is more dangerous for Argentina than vice versa 3Newly discovered molecule essential to resetting 'body clocks' 2
Canine Serum...
NORMAL DONOR DONKEY SERUM...
Homo sapiens toll interacting protein Antigen: Recombinant Protein...
Mouse monoclonal [PRMT5-21] to PRMT5 ( Abpromise for all tested applications). entrezGeneID: 10419 SwissProtID: O14744...
Biology Products: