Navigation Links
Flat lens offers a perfect image
Date:8/24/2012

Cambridge, Mass. August 23, 2012 Applied physicists at the Harvard School of Engineering and Applied Sciences (SEAS) have created an ultrathin, flat lens that focuses light without imparting the distortions of conventional lenses.

At a mere 60 nanometers thick, the flat lens is essentially two-dimensional, yet its focusing power approaches the ultimate physical limit set by the laws of diffraction.

Operating at telecom wavelengths (i.e., the range commonly used in fiber-optic communications), the new device is completely scalable, from near-infrared to terahertz wavelengths, and simple to manufacture. The results have been published online in the journal Nano Letters.

"Our flat lens opens up a new type of technology," says principal investigator Federico Capasso, Robert L. Wallace Professor of Applied Physics and Vinton Hayes Senior Research Fellow in Electrical Engineering at SEAS. "We're presenting a new way of making lenses. Instead of creating phase delays as light propagates through the thickness of the material, you can create an instantaneous phase shift right at the surface of the lens. It's extremely exciting."

Capasso and his collaborators at SEAS create the flat lens by plating a very thin wafer of silicon with an nanometer-thin layer of gold. Next, they strip away parts of the gold layer to leave behind an array of V-shaped structures, evenly spaced in rows across the surface. When Capasso's group shines a laser onto the flat lens, these structures act as nanoantennas that capture the incoming light and hold onto it briefly before releasing it again. Those delays, which are precisely tuned across the surface of the lens, change the direction of the light in the same way that a thick glass lens would, with an important distinction.

The flat lens eliminates optical aberrations such as the "fish-eye" effect that results from conventional wide-angle lenses. Astigmatism and coma aberrations also do
'/>"/>

Contact: Caroline Perry
cperry@seas.harvard.edu
617-496-1351
Harvard University
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Fortis Offers Bachelor of Science in Nursing Degree Program to Florida Students
2. Gundersen Lutheran Offers Heart Surgery with Less Pain, Faster Recovery
3. UH Case Medical Center Offers New Therapy for Gynecologic Cancer Patients
4. Butamax Granted Core Patent for Making Biobutanol and Distillers Grains; Offers Producers Efficient, Low-Cost Production of Biobutanol
5. Big Saver: Molderizer Offers 30% Mold Remediation Products Price Cut
6. Tri-Valley Sedation Dentist Dr. Endre Selmeczy Now Offers High-quality Dental Restorations
7. Berkshire Corporation Offers Live Chat For Americas Website and Shopping Cart
8. Salimetrics Offers New Saliva Collection Aid for Easy Collection of Passive Drool Samples
9. AMRESCO Offers New Prism Protein Marker With Vibrant Colors For Easy Band Identification
10. Dr. Ross Kaplan Offers New State-of-the-Art Wrinkle, Fine Line, and Skin Texture Improvement Treatment
11. Imperfections may improve graphene sensors
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Flat lens offers a perfect image
(Date:1/15/2014)... RedBrick Health , a fast-growing leader in consumer ... EmblemHealth , the New York ... the RedBrick Compass health assessment, combined with the RedBrick ... members. EmblemHealth is among the first health plans in ...
(Date:1/15/2014)... VA (PRWEB) January 15, 2014 Two ... have continued their sponsorship of an annual competition for ... in, and access to, innovative STEM study. The competition ... TEAMS: Tests of Engineering Aptitude, Mathematics, and Sciences ...
(Date:1/15/2014)... Freeslate, Inc ., the leading provider ... Limited, one of India’s top five pharmaceutical companies, has ... for high throughput solid form screening. , ... wide range of quality, affordable generic and branded formulations ...
(Date:1/14/2014)... Carahsoft and CDS Federal Services have ... at 2pm EST (11am PST), “Natural Language Processing: Converting ... how technology can turn raw, heterogeneous data into actionable ... The online webinar will last approximately one hour. , ...
Breaking Biology Technology:EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2
... Mass. and SYDNEY, Sept. 14, 2011 HeartWare International, ... a leading innovator of less invasive, miniaturized circulatory support ... failure, today announced that CEO Doug Godshall is scheduled ... at 10:30 a.m. ET on Wednesday, September 21, 2011. ...
... Sept. 14, 2011 Tengion, Inc. (NASDAQ: TNGN ... Davis, Vice President Finance and Chief Financial Officer of Tengion, ... on Monday, September 19, 2011, at 1:30 pm EDT. ... accessed under "Calendar of Events" in the Investors section of ...
... 13Researchers at Vanderbilt University have developed a new technique that ... tissue at multiple points simultaneously, a method that could help ... and change shape. UV lasers are a commonly-used ... incisions by vaporizing one point at a time in a ...
Cached Biology Technology:HeartWare to Present at the UBS Global Life Sciences Conference 2Tengion to Present at UBS Global Life Sciences Conference 2
(Date:4/23/2014)... Toronto Scarborough research shows that male black widow spiders ... a rare example of mate preference by male spiders. ... Emily MacLeod and Maydianne Andrade, a professor in UTSC,s ... studies and the wild that males overwhelmingly chose to ... black widows can tell whether a potential mate is ...
(Date:4/23/2014)... Scientists have conclusive evidence that the source of a ... Ocean and called the "bio-duck," is the Antarctic minke ... by submarine personnel in the 1960s who thought it ... recorded at various locations in the Southern Ocean, but ... In February 2013, an international team of researchers deployed ...
(Date:4/23/2014)... accurate group decision increases with the abundance of brains ... a variety of factors as often happens in ... smaller groups actually tend to make more accurate decisions ... certain pieces of information. , The findings present a ... or the "wisdom of crowds," wherein individual observations ...
Breaking Biology News(10 mins):Picky male black widow spiders prefer well-fed virgins 2Scientists identify source of mysterious sound in the Southern Ocean 2Scientists identify source of mysterious sound in the Southern Ocean 3Too many chefs: Smaller groups exhibit more accurate decision-making 2Too many chefs: Smaller groups exhibit more accurate decision-making 3
... ARBOR, Mich. Researchers from the University of Michigan ... overexpressed in 90 percent of pancreatic cancers, the most ... Ataxia Telangiectasia Group D Complementing gene, called ATDC, is ... than in cells from a normal pancreas. What,s more, ...
... Germany March 2, 2009 >> Genomatix Software, a ... Next Generation Sequencing (NGS) data, announced today that Boehringer ... Mining Station and a Genomatix Genome Analyzer at its ... the only complete and integrated analysis solution for NGS ...
... of Illinois plant geneticist Stephen Moose has developed a corn ... that would make good silage, Moose said, due to a ... make it a good energy crop. The gene known ... giving corn seedlings a waxy coating that acts like a ...
Cached Biology News:U-M researchers ID gene involved in pancreatic cancer 2Boehringer Ingelheim uses Genomatix' Next Generation Sequencing data analysis systems 2Doubling a gene in corn results in giant biomass 2
... purified from egg white. The extinction coefficient , ... in 10 mM phosphate-buffered saline, pH ... sodium azide and 50% glycerol. Avidin (from egg ... is purified by molecular sieving and ...
Request Info...
Request Info...
... CELLection Dynabeads (4.5 m) coated with the ... EpCAM and DNase Releasing Buffer. For ... tumour cells directly from blood, bone marrow ... enriched from bone marrow. Enriched cells are ...
Biology Products: