Navigation Links
Researchers create terahertz invisibility cloak
Date:4/27/2011

Researchers at Northwestern University have created a new kind of cloaking material that can render objects invisible in the terahertz range.

Though this design can't translate into an invisibility cloak for the visible spectrum, it could have implications in diagnostics, security, and communication.

The cloak, designed by Cheng Sun, assistant professor of mechanical engineering at Northwestern's McCormick School of Engineering and Applied Science, uses microfabricated gradient-index materials to manipulate the reflection and refraction of light. Sun's results will be presented May 4 at CLEO: 2011, the annual Conference on Lasers and Electro-Optics.

Humans generally recognize objects through two features: their shape and color. To render an object invisible, one must be able to manipulate light so that it will neither scatter at an object's surface nor be absorbed or reflected by it (the process which gives objects color).

In order to manipulate light in the terahertz frequency, which lies between infrared and microwaves, Sun and his group developed metamaterials: materials that are designed at the atomic level. Sun's tiny, prism-shaped cloaking structure, less than 10 millimeters long, was created using a technique called electronic transfer microstereolithography, where researchers use a data projector to project an image on a liquid polymer, then use light to transform the liquid layer into a thin solid layer. Each of the prism's 220 layers has tiny holes that are much smaller than terahertz wavelengths, which means they can vary the refraction index of the light and render invisible anything located beneath a bump on the prism's bottom surface; the light then appears to be reflected by a flat surface.

Sun says the purpose of the cloak is not to hide items but to get a better understanding of how to design materials that can manipulate light propagation.

"This demonstrates that we have the freedom to desi
'/>"/>

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Understanding the science of solar-based energy: more researchers are better than one
2. Researchers decode viral process that prepares cells for HIV infection
3. Dartmouth researchers advance cellulosic ethanol production
4. Researchers develop new model for cystic fibrosis
5. Use it or lose it? Researchers investigate the dispensability of our DNA
6. Sigma-Aldrich and the University of Illinois Offer New Boronic Acid Surrogates to Researchers Worldwide Through Licensing Agreement
7. Researchers write protein nanoarrays using a fountain pen and electric fields
8. Researchers show how to stamp nanodevices with rubber molds
9. The Lancets New Online Medical Journal Helps Clinicians and Medical Researchers Find Practice-Changing Evidence Quickly and Easily
10. Ultrafast lasers give CU-Boulder researchers a snapshot of electrons in action
11. VAP(R) Cholesterol Test Helps Researchers Identify Treatment Effects of Combination Therapy
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/22/2014)... (PRWEB) July 22, 2014 OHAUS ... portable, and mechanical balances and scales, proudly announces ... has won Laboratory Equipment magazine’s 2014 “Readers' Choice” ... second consecutive year the Explorer was voted the ... annual Readers’ Choice Awards celebrates “excellence in product ...
(Date:7/22/2014)... og SHENZHEN , Kina, 22. ... LTD, (BGI Tech), et datterselskab af BGI, verdens ... ny human whole exome-sekvenseringstjeneste baseret på Complete Genomics ... anset i branchen for at levere patenterede sekvenseringsteknologier ... alle typer varianter, blev købt af BGI i ...
(Date:7/22/2014)... SHENZHEN, China , 22 juli 2014 /PRNewswire/ ... dochtermaatschappij van BGI, ,s wereld grootste organisatie op het ... een nieuwe service ten behoeve van hele menselijke genoomsequentie ... Complete Genomics. In 2013 acquireerde BGI ... hoog aanzien staat vanwege de in eigen beheer ontwikkelde ...
(Date:7/22/2014)... Hussey Copper , a leader in copper manufacturing ... Pullman Regional Hospital,s conversion of more than 1,100 touch ... at a nominal cost.  This reasonably priced surface kills ... within 2 hours of exposure 1 and will aid ... in its facilities. Pullman Regional Hospital, in ...
Breaking Biology Technology:OHAUS Explorer Voted “Best Balance” in Laboratory Equipment’s 2014 Readers’ Choice Awards 2BGI Tech lancerer Human Whole Exome-sekvenseringstjeneste på Complete Genomics avancerede platform 2BGI Tech introduceert service op gebied van hele menselijke exoomsequencing op geavanceerd Complete Genomics-platform 2Pullman Regional Hospital changes more than 1,100 touch points to Hussey Copper's MD-Cu29 antimicrobial copper to help protect against bacteria 2Pullman Regional Hospital changes more than 1,100 touch points to Hussey Copper's MD-Cu29 antimicrobial copper to help protect against bacteria 3
... Therapeutics, Inc.,a privately-held company focused on improving the ... today that the company,has raised $15.5 million in ... was co-led by New Leaf Ventures and Clarus ... conjunction with the financing,Kathleen LaPorte, managing director, New ...
... ATLANTA and ST. LOUIS, Sept. 6 ... organization (GPO) serving St. Louis-,based Sisters of ... with Elekta,enabling members to begin purchasing Elekta,s ... ) Under the agreement, Mercy ...
... Primary Endpoint Could be Acceptable With Fewer ... Patients Than Originally Planned, ... CTIC ) (MTAX: CTIC) announced today that following,discussions with the ... for patients with aggressive non-Hodgkin,s lymphoma,(NHL) the Company has decided ...
Cached Biology Technology:Pearl Therapeutics Raises $15.5 Million in Private Financing 2Pearl Therapeutics Raises $15.5 Million in Private Financing 3Elekta Contract Provides Sisters of Mercy Health System Access to Leading Radiation Therapy Solutions 2Discussions With FDA on Pixantrone EXTEND (PIX301) Trial Provide Path for NDA Submission 2Discussions With FDA on Pixantrone EXTEND (PIX301) Trial Provide Path for NDA Submission 3Discussions With FDA on Pixantrone EXTEND (PIX301) Trial Provide Path for NDA Submission 4
(Date:7/22/2014)... prevent their daughters from breeding, and kill their grandchildren ... desert creatures which live in groups with a dominant ... alpha female can flourish when it maintains the sole right ... life, also found in many animals such as ants and ... Dominant meerkats control breeding within their group through violence, by ...
(Date:7/21/2014)... part of a multinational, collaborative effort, researchers from Canada,s ... identify over 100 locations in the human genome associated ... the largest genomic study published on any psychiatric disorder ... , point to biological mechanisms and pathways that may ... treating the disorder, which has seen little innovation in ...
(Date:7/21/2014)... there are reasons mammoths and mastodons could have been ... research from the University of Cincinnati, the famously fuzzy ... before it was trendy at the end of ... Crowley, an assistant professor of geology and anthropology, shows ... likely were year-round residents and not nomadic migrants as ...
Breaking Biology News(10 mins):International team sheds new light on biology underlying schizophrenia 2International team sheds new light on biology underlying schizophrenia 3Mammoth and mastodon behavior was less roam, more stay at home 2Mammoth and mastodon behavior was less roam, more stay at home 3
... fumes, risk developing increased clumsiness and the result may ... of a study at the University of Gothenburg, Sweden, of ... in Sweden work full-time with welding, while many more carry ... has shown that the concentration of manganese in the air ...
... Murphy works with some of the most powerful tools in ... These constructions sound a bit like socket wrenches, which can ... or to loosen a rusted-tight one-inch bolt using a very ... associate professor of biomedical engineering and orthopedics and rehabilitation at ...
... of threatened loggerhead sea turtles has revealed two previously unknown ... important habitat for at least three separate populations of the ... Biological Conservation . The two sites, located ... and the northern tip of the Yucatan Peninsula, were found ...
Cached Biology News:Increased clumsiness in former welders 2Smallest tools could give biggest results in bone repair 2Smallest tools could give biggest results in bone repair 3Satellite tracking reveals sea turtle feeding hotspots 2Satellite tracking reveals sea turtle feeding hotspots 3