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:10/1/2014)... WARRINGTON, Pa. , Oct. 1, 2014 /PRNewswire/ ... the Company has been awarded a Phase II ... up to $3.0 million from the National Institute ... National Institutes of Health (NIH) to support the ... surfactant as a medical countermeasure to mitigate acute ...
(Date:10/1/2014)... Md. , Oct. 1, 2014  Spherix ... to the fostering and monetization of intellectual property, ... litigation against VTech and Uniden in the U.S. ... Texas has been rescheduled for ... for October 2, 2014.  The Court Order setting ...
(Date:10/1/2014)... The participants committed to not only ... their own time adjusting, tweaking and testing virtual models ... ready for judging. , “I enjoyed being involved as ... “The entries showed a commendable range exploring the ... the print medium and the creativity of the contestants.” ...
(Date:10/1/2014)... Washington, USA (PRWEB) September 30, 2014 ... yet efficient arrangements that have evolved in nature over ... biomimetic and bioinspired materials for applications in biophotonics ... Biomedical Optics . The journal is published by SPIE, ... SPIE Digital Library. Several of the peer-reviewed articles are ...
Breaking Biology Technology:Discovery Labs Receives SBIR Grant Valued up to $3.0 Million to Support Development of Aerosolized KL4 Surfactant to Address Radiation-Induced Lung Injury 2Discovery Labs Receives SBIR Grant Valued up to $3.0 Million to Support Development of Aerosolized KL4 Surfactant to Address Radiation-Induced Lung Injury 3Markman Hearing Date for VTech and Uniden Litigation Now Set for November 10, 2014 2Array Architects Challenges Staff to Create with 3D Printer 2Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 2Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 3
... , , PRINCETON, N.J., July 24 ... companies from around the world who gather at InformexUSA 2010 will ... past, allowing them to connect more precisely with others in their ... The show opens February 16, 2010 in San Francisco, with a ...
... , SILVER SPRING, Md., July 24 ... that it will release its 2009 second quarter financial results ... , United Therapeutics Corporation will host ... a.m. Eastern Time. The teleconference is accessible by dialing ...
... ... offers Fetal Bovine Serum (FBS) originating from abattoirs located in the US, ... treatments such as heat inactivation, dialysis, or gamma irradiation are available as ... FBS for embryonic stem cell research. Each FBS order includes a ...
Cached Biology Technology:Informex Rebrands Into Separate Pharmaceutical and Specialty Chemical Segments to Better Serve Exhibitors and Attendees 2Informex Rebrands Into Separate Pharmaceutical and Specialty Chemical Segments to Better Serve Exhibitors and Attendees 3Spectrum Announces Fetal Bovine Serum Product Line 2
(Date:9/30/2014)... 30, 2014 Winners of The Economist,s prestigious ... scheduled to take place at the JW Marriott Hong Kong on ... winners will share their experiences and the lessons those hold for ... proven innovation over the past decade, will be presented at a ... the summit. It will be the first time the ceremony has ...
(Date:9/29/2014)... tar tended to be lower for smokers of slim ... nicotine tended to be lower. , Slim cigarettes are ... around the world. Previous studies have shown that the ... these cigarettes are lower than those in regular cigarettes. ... are not necessarily linked to a reduced exposure to ...
(Date:9/29/2014)... Monday, September 29: Between 1970 and 2010 ... around the globe dropped 52 percent, says the ... Wildlife Fund (WWF). This biodiversity loss occurs disproportionately ... use of high-income countries. , In addition to ... data point to other warning signs about the ...
Breaking Biology News(10 mins):Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 2Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 3Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 4Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 5Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 6Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 7Slim cigarette smokers not exposed to more harmful chemicals 2Half of global wildlife lost, says new WWF report 2
... mighty animal sounds are all around us. In a few ... discussed and heard at the largest meeting ever devoted to ... Monday June 30 through Friday July 4 at the Palais ... one dimension of Acoustics ,08 Paris. It is the field ...
... engineer who has developed optical technology shown to be ... received a $7.5 million grant over five years from ... that potentially could become a routine colon cancer screening ... cancer is the second-leading cause of cancer deaths in ...
... 25, 2008 An authority on the quality ... consumers and municipal water supply systems, including unexpected ... first of a special series of podcasts from ... scientific society. Marc Edwards, Ph.D., notes that ...
Cached Biology News:Killer whales, blind bats, discriminating dolphins, mating birds 2Killer whales, blind bats, discriminating dolphins, mating birds 3Killer whales, blind bats, discriminating dolphins, mating birds 4Killer whales, blind bats, discriminating dolphins, mating birds 5Killer whales, blind bats, discriminating dolphins, mating birds 6Killer whales, blind bats, discriminating dolphins, mating birds 7Killer whales, blind bats, discriminating dolphins, mating birds 8Killer whales, blind bats, discriminating dolphins, mating birds 9Killer whales, blind bats, discriminating dolphins, mating birds 10Killer whales, blind bats, discriminating dolphins, mating birds 11Killer whales, blind bats, discriminating dolphins, mating birds 12Killer whales, blind bats, discriminating dolphins, mating birds 13Killer whales, blind bats, discriminating dolphins, mating birds 14NCI grant launches clinical trials for colon cancer screening 2NCI grant launches clinical trials for colon cancer screening 3Global Challenges/Chemistry Solutions debuts with focus on drinking water 2
... exchange media are hydrophilic, ... binding capacity. The UNOsphere ... strong cation exchanger with ... 120 micrometers. Fully supported ...
... This CLS number is a new ... Cornings product number. If showing no ... old Sigma-Aldrich number (Z71,487-9) or contact ... clarifier: centre neck 100 mm, No. ...
Packaging: 6 bottles for 1 l ready-to-use-solution ID clarifier: ready-to-use solution ...
... S-X media are neutral, porous ... exclusion chromatography of lipophilic polymers ... organic eluents. The beads are ... carbon tetrachloride, dimethylformamide, ketones, aromatics, ...
Biology Products: