Navigation Links
Counting the twists in a helical light beam
Date:1/8/2013

n multiplexing to increase the capacity of single-mode optical fibers," explains Capasso. "In the future, this capacity could be greatly increased by using vortex beams transmitted on special multicore or multimode fibers. For a transmission system based on this 'spatial division multiplexing' to provide the extra capacity, special detectors capable of sorting out the type of vortex transmitted will be essential."

The new detector is able to tell one type of vortex beam from another due to its precise nanoscale patterning. When a vortex beam with the correct number of coils per wavelength strikes the gold plating on the detector's surface, it encounters a holographic interference pattern that has been etched into the gold. This nanoscale patterning allows the light to excite the metal's electrons in exactly the right way to produce a focused electromagnetic wave, known as a surface plasmon. The light component of this wave then shines through a series of perforations in the gold, and lands on the photodetector below.

If the incoming light doesn't match the interference pattern, the plasmon beam fails to focus or converge and is blocked from reaching the detector.

Capasso's research team has demonstrated this process using vortex beams with orbital angular momentum of −1, 0, and 1.

"In principle, an array of many different couplers and detectors could be set up to read data transmitted on a very large number of channels," says lead author Patrice Genevet, a research associate in applied physics at SEAS. "With this approach, we transform detectors that were originally only sensitive to the intensity of light, so that they monitor the twist of the wavefronts. More than just detecting a specific twisted beam, our detectors gather additional information on the phase of the light beam."

The device's ability to detect and distinguish vortex beams is important for optical communications, but its capabilities may extend be
'/>"/>

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

Page: 1 2 3

Related biology technology :

1. 2011 ErgoExpo Attendees Choice Award Winners Announced During Sold Out Expo; Exhibitor Renewal for 2012 Hits 96% and Counting
2. Sequenom Announces Appointment of Carolyn Beaver to Chief Accounting Officer
3. NASA develops super-black material that absorbs light across multiple wavelength bands
4. A light wave of innovation to advance solar energy
5. The Foremost Expert on Morgellons Disease Highlights the Gravity of This Illness
6. BioSpace Spotlights Northwests Life Science Community
7. Multidisciplinary team of researchers develop world’s lightest material
8. Blocked holes can enhance rather than stop light going through
9. Novartis Highlights Advances for Patients With Breast Cancer and Hematological Diseases With Over 160 SABCS and ASH Abstracts
10. New 3-D transistors promising future chips, lighter laptops
11. Sheffield scientists shine a light on the detection of bacterial infection
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Counting the twists in a helical light beam
(Date:9/2/2015)... 02, 2015 Research and ... Jain PharmaBiotech,s new report "Gene Therapy - Technologies, ... The markets for gene therapy are difficult to estimate ... and it is marketed in China ... the years 2014-2024. The estimates are based on epidemiology ...
(Date:9/2/2015)...  Neurotech Pharmaceuticals, Inc., announced today the first ... 2 clinical trial of NT-503 Encapsulated Cell Therapy ... choroidal neovascularization secondary to age related macular degeneration ... growth factor (VEGF) receptor protein continuously produced by ... proof-of-concept study will evaluate NT-503 ECT as a ...
(Date:9/2/2015)... 2015 BioLight Life Sciences ... "Company"), a firm that invests in, manages and ... announced today that presentations highlighting its IOPtiMate™ system ... at the Ophthalmology Futures European Forum and the ... & Refractive Surgeons ("ESCRS"), both taking place in ...
(Date:9/2/2015)... ... September 02, 2015 , ... Whitehouse Laboratories is excited ... Pharma Ed Resources upcoming educational seminar and training session on Extractable & Leachable ... conference will provide Updates & Case Studies on the Latest Compliance Implications of ...
Breaking Biology Technology:Global Gene Therapy Market Study 2015-2024 - Technologies, Markets and Companies Analysis 2Neurotech Announces First Patient Enrolled in Novel Anti-VEGF Encapsulated Cell Therapy Study 2Neurotech Announces First Patient Enrolled in Novel Anti-VEGF Encapsulated Cell Therapy Study 3Neurotech Announces First Patient Enrolled in Novel Anti-VEGF Encapsulated Cell Therapy Study 4Presentations to Highlight BioLight's IOPtiMate[TM] System at Upcoming European Ophthalmology Conferences 2Presentations to Highlight BioLight's IOPtiMate[TM] System at Upcoming European Ophthalmology Conferences 3Whitehouse Laboratories to Participate in Pharm Ed Resources Extractables, Leachables, & Elemental Impurities Educational Seminar 2Whitehouse Laboratories to Participate in Pharm Ed Resources Extractables, Leachables, & Elemental Impurities Educational Seminar 3
... Inc. (NYSE: NTY ), (http://www.NBTY.com ), a leading global ... cast a conference call to review,fiscal first quarter results on ... 2008 at 8:30 AM (ET). A press release announcing,results for ... (ET) that,day., A live and on-demand web cast of ...
... Up 9% ... - Non-GAAP Diluted EPS Up ... Varian, Inc.,(NasdaqGS: VARI) today reported first quarter 2008 revenues of $237.4,million, ... quarter of fiscal year 2007. The increase was broad-based,with growth in sales ...
... N.C., Jan. 23 PPD, Inc. (Nasdaq:,PPDI) today ... lab services,into China through an exclusive agreement with ... allows PPD to begin,immediately providing biopharmaceutical clients with ... in China., "Chinese law makes it extremely ...
Cached Biology Technology:NBTY to Web Cast Fiscal First Quarter Conference Call 2Varian, Inc. Reports First Quarter 2008 Results 2Varian, Inc. Reports First Quarter 2008 Results 3Varian, Inc. Reports First Quarter 2008 Results 4Varian, Inc. Reports First Quarter 2008 Results 5Varian, Inc. Reports First Quarter 2008 Results 6Varian, Inc. Reports First Quarter 2008 Results 7Varian, Inc. Reports First Quarter 2008 Results 8Varian, Inc. Reports First Quarter 2008 Results 9Varian, Inc. Reports First Quarter 2008 Results 10Varian, Inc. Reports First Quarter 2008 Results 11Varian, Inc. Reports First Quarter 2008 Results 12Varian, Inc. Reports First Quarter 2008 Results 13Varian, Inc. Reports First Quarter 2008 Results 14Varian, Inc. Reports First Quarter 2008 Results 15Varian, Inc. Reports First Quarter 2008 Results 16Varian, Inc. Reports First Quarter 2008 Results 17Varian, Inc. Reports First Quarter 2008 Results 18PPD Expands Global Central Lab Services into China 2PPD Expands Global Central Lab Services into China 3
(Date:8/6/2015)... 6, 2015  Today, U.S. Congressman Mike ... ™ to learn firsthand how Silicon Valley technologies ... is a world leader in multi-factor identity management ... helping federal agencies and commercial organizations achieve new ... "The vast majority of network breaches can ...
(Date:8/5/2015)... According to a new market research report, ... (BFSI, Airport, IT & Telecom, Utilities, Education, Defense & ... published by MarketsandMarkets, defines and segments the Physical Identity ... global PIAM Market is estimated to grow from $272.2 ... a CAGR of 14.9 % from 2014 to 2019. ...
(Date:8/4/2015)... DUBLIN , Aug. 04, 2015 /PRNewswire/ ... ( http://www.researchandmarkets.com/research/nvh7k2/digital_forensics ) has announced the addition ... Component (Hardware, Software, and Service), Sub-Segment (Computer ... Cloud Forensics), Tool Types, Service, Vertical and ... report to their offering. By ...
Breaking Biology News(10 mins):Rep. Honda to Visit Crossmatch in Redwood City 2Physical Identity and Access Management Market Worth $546.2 Million by 2019 2Physical Identity and Access Management Market Worth $546.2 Million by 2019 3Physical Identity and Access Management Market Worth $546.2 Million by 2019 4Digital Forensics Market - The Market Represents a Compound Annual Growth Rate (CAGR) of 11.3% From 2015 to 2020 2
... in the resource-rich Arctic, countries like China, India and Brazil, ... door of the increasingly influential Arctic Council looking for admission ... with Russia and Canada most strongly opposed. It is among ... as it prepares to chair the Council next year. ...
... potentially involved in regulating breast cancer progression has been ... Led by professor Costel Darie, the team worked to ... a pituitary hormone that had previously been shown to ... Earlier studies had shown that breast cancer cells treated ...
... An international team of scientists led by University of ... Mebel of Florida International University, and Alexander Tielens of ... route to form polycyclic aromatic hydrocarbons (PAHs) complex ... in ultra-cold regions of interstellar space. The team ...
Cached Biology News:Eyeing resources, India, China, Brazil, Japan, other countries want a voice on Arctic Council 2Eyeing resources, India, China, Brazil, Japan, other countries want a voice on Arctic Council 3Eyeing resources, India, China, Brazil, Japan, other countries want a voice on Arctic Council 4UH Manoa researchers discover novel chemical route to form organic molecules 2UH Manoa researchers discover novel chemical route to form organic molecules 3UH Manoa researchers discover novel chemical route to form organic molecules 4
... Osteogenesis Assay Kit contains all reagents necessary ... osteoblastic lineage, as determined by staining for ... the necessary reagents and a protocol for ... This product is useful for studying the ...
... As the world of discovery races ever faster, ... on the fast track. So our constant focus ... accelerate your research. Thats why our Biomek 3000 ... thats as advanced as it is flexible. By ...
... is the ideal instrument for budget-conscious labs that ... applications. Get Applied Biosystems proven PCR ... lab space without sacrificing results. Enhance ... Technology You Can Afford The Applied ...
... micro 10 represents a major advance in ... the benefits of large robotic liquid handlers ... dispenser. Dispensing accurate volumes ranging from 10mL ... has unique advantages not yet found in ...
Biology Products: