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:9/2/2014)... NEW YORK , September 2, 2014 ... Market Study on Membrane Technology in Pharmaceutical, Biopharma and ... Witness Highest Growth by 2019" the global membrane technology market for ... 7,029.9 million in 2014 and is expected to grow ... to reach an estimated value of USD 10,886.0 million ...
(Date:9/2/2014)... 2014 Myriant Corporation, a global ... a distribution agreement with Azelis Group, a specialty ... bio-succinic acid in the Nordics, Benelux, France, Iberia, ... in the industrial and base chemicals markets. , ... a far-reaching chemical portfolio with extensive distribution networks ...
(Date:9/2/2014)...  Xencor, Inc. (NASDAQ: XNCR ), ... for the treatment of autoimmune diseases, asthma and ... of Debra Zack , M.D., Ph.D., vice ... Lloyd Rowland , senior vice president, chief compliance ... expertise in biologics clinical development and medical affairs ...
(Date:9/2/2014)... , Sept. 2, 2014 /PRNewswire/ - BIOREM Inc. (TSXV: BRM) ("Biorem" ... million. The orders consist of three large odour control systems ... . "These orders are consistent with the market ... Peter Bruijns , President and CEO. "After a difficult period ... are now beginning to see sales growth. Our lower cost ...
Breaking Biology Technology:Global Membrane Technology Market Will Reach $10,886.0 Million in 2019: Persistence Market Research 2Global Membrane Technology Market Will Reach $10,886.0 Million in 2019: Persistence Market Research 3Global Membrane Technology Market Will Reach $10,886.0 Million in 2019: Persistence Market Research 4Global Membrane Technology Market Will Reach $10,886.0 Million in 2019: Persistence Market Research 5Myriant and Azelis Sign European Distribution Agreement for Bio-Succinic Acid 2Xencor Appoints Debra Zack, M.D., Ph.D., Vice President, Clinical Development and Lloyd Rowland, Senior Vice President, Chief Compliance Officer and General Counsel 2Xencor Appoints Debra Zack, M.D., Ph.D., Vice President, Clinical Development and Lloyd Rowland, Senior Vice President, Chief Compliance Officer and General Counsel 3
... in third quarter 2008; up 40% year-to-date , ... goodwill impairment charge , , ... Inc. (Nasdaq: ENCO ) , a full service ... countries for many of the world,s leading pharmaceutical and ...
... this years, most unique must-have gift , ... New York, NY(PRWEB) November ... from the customers, DNA, launch DNA Mini Portraits™, a more affordable line ... DNA Minis are the most personal and unique gifting solution for this ...
... Zounds Hearing, a unique manufacturing,and retail company ... point and professional service, announces the introduction of,assistive ... all who are hard of,hearing. The various devices ... Hearing,Centers retail locations effective November 24, 2008. ...
Cached Biology Technology:Encorium Reports Third Quarter 2008 Financial Results 2Encorium Reports Third Quarter 2008 Financial Results 3Encorium Reports Third Quarter 2008 Financial Results 4Encorium Reports Third Quarter 2008 Financial Results 5Encorium Reports Third Quarter 2008 Financial Results 6Encorium Reports Third Quarter 2008 Financial Results 7Encorium Reports Third Quarter 2008 Financial Results 8Encorium Reports Third Quarter 2008 Financial Results 9DNA 11, Creators of DNA Art, Introduces a More Affordable Line of Custom Portraits for this Year's Gift Giving Season 2Zounds Offers the Gift of Hearing This Holiday Season With a Range of New Products 2
(Date:9/2/2014)... September 2, 2014 In a new study that ... the Florida campus of The Scripps Research Institute (TSRI) ... into unique manufacturing sites for molecules that can treat ... cell as a reaction vessel and a disease-causing defect ... diseased cell," said TSRI Professor Matthew Disney.,"Because the treatment ...
(Date:9/2/2014)... sequence their genetic information. How is it possible ... parts of the body are so different? While every ... additional regulatory layer exists that determines which of the ... modifications of genome-bound histone proteins or the DNA itself ... top of the genetic information and is thus called ...
(Date:9/2/2014)... issue of The FASEB Journal , ... the leading cause of blindness in adults, diabetic ... advance involves quantifying the early molecular changes caused ... Using new probes developed by scientists, they were ... diabetic retinopathy. , "My goal is to establish ...
Breaking Biology News(10 mins):Scripps Florida scientists make diseased cells synthesize their own drug 2Throwing a loop to silence gene expression 2Molecular probes permit doctors to detect diabetic retinopathy before vision fails 2
... and other insects to flap their wings, jump and ... in an article in the journal ACS Macro ... a protein called resilin in nanosprings, biorubbers, biosensors and ... scientists discovered resilin a half-century ago in the wing ...
... deep underground could at the same be used to release ... thus offsetting some of the environmental impact of burning fossil ... peer-reviewed International Journal of Oil, Gas and Coal Technology ... previously untapped fossil fuel reserves has been in the headlines ...
... don,t expect to catch the flute-like song of a Veery ... hoots, and is singing much less to ensure that it ... by Kenneth Schmidt of Texas Tech University and Kara Loeb ... journal Behavioral Ecology and Sociobiology , provides insights into ...
Cached Biology News:Sequestration and fuel reserves 2Veeries very quiet when owls are about 2
... is a 10.0 kb Autographa californica (AcNPV) ... the AcNPV polyhedrin promoter and two AcNPV ... is a Sma I cloning site, followed ... this,an inverted polyhedrin promoter has been inserted ...
... a mixture of Strep•Tag® II fusion proteins ... markers provide precise size references for proteins ... blue. Because each of the proteins contains ... also be detected by the Strep•Tag II ...
... The UltraRocker rocking platform, 120 V, is ... overnight incubation of liquid cultures, staining and destaining ... rocker features variable speed control (8-40 rpm) and ... (10 lb). The rocker features two 29 x ...
...
Biology Products: