Navigation Links
This little light of mine: Changing the color of single photons emitted by quantum dots
Date:10/14/2010

Researchers at the National Institute of Standards and Technology (NIST) have demonstrated* for the first time the conversion of near-infrared 1,300 nm wavelength single photons emitted from a true quantum source, a semiconductor quantum dot, to a near-visible wavelength of 710 nm. The ability to change the color of single photons may aid in the development of hybrid quantum systems for applications in quantum communication, computation and metrology.

Two important resources for quantum information processing are the transmission of data encoded in the quantum state of a photon and its storage in long-lived internal states of systems like trapped atoms, ions or solid-state ensembles. Ideally, one envisions devices that are good at both generating and storing photons. However, this is challenging in practice because while typical quantum memories are suited to absorbing and storing near-visible photons, transmission is best accomplished at near-infrared wavelengths where information loss in telecommunications optical fibers is low.

To satisfy these two conflicting requirements, the NIST team combined a fiber-coupled single photon source with a frequency up-conversion single photon detector. Both developed at NIST, the frequency up-conversion detector uses a strong pump laser and a special non-linear crystal to convert long wavelength (low frequency) photons into short wavelength (high frequency) photons with high efficiency and sensitivity (http://www.nist.gov/itl/antd/nir_082509.cfm).

According to Matthew Rakher and Kartik Srinivasan, two authors of the paper, previous up-conversion experiments looked at the color conversion of highly attenuated laser beams that contained less than one photon on average. However, these light sources still exhibited "classical" photon statistics exactly like that of an unattenuated laser, meaning that the photons are organized in such as way
'/>"/>

Contact: Mark Esser
mark.esser@nist.gov
301-975-8735
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Ferring Celebrates Winner of 2008 My Little Miracle Essay Contest During National Infertility Awareness Week
2. Clinical Research Study Focuses on Little Known Behavioral Changes Related to Parkinsons Disease
3. Looking Older Than You Are May Have Little to Do With Wrinkles
4. Microfluidics Chairman James N. Little, Ph.D., Announces Retirement from Board of Directors
5. Biological H1N1 Vaccines: Too Little, Too Late
6. A little less force: Making atomic force microscopy work for cells
7. Informed Medical Communications Highlights Opportunity in Revised PhRMA Code
8. DOE JGI Director Eddy Rubin highlights the genomics of plant-based biofuels in the journal Nature
9. Neuralstem Reports Second Quarter Financial Results and Highlights
10. Light touch: Controlling the behavior of quantum dots
11. ChanTest to Highlight the Worlds Largest Catalog of Ion Channel-Expressing Cell Lines and Discovery Services at Ion Channel Targets, Booth 5
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
This little light of mine: Changing the color of single photons emitted by quantum dots
(Date:8/21/2014)... On Wednesday of last week RENU 28, the world's first ... available for purchase in Australia and New Zealand, and the ... works is, if you think about the definition of aging, ... renewal within your body. If you think about the definition ... renewal. What RENU 28 does is it works with these ...
(Date:8/20/2014)... Neurotrope, Inc. (OTCQB: NTRP) today announced ... provide an update on Company activities. Access information:Date:Tuesday, ... 505-4369 (U.S. and Canada) or (719) 325-2315 Conference ... under "Investor Relations"The teleconference replay will be available ... 2014 at (888) 203-1112 (U.S. and ...
(Date:8/20/2014)... August 20, 2014 Not long ago, ... studies should be performed late in the development cycle ... But current regulatory trends suggest that, like many things ... rise. In recent years, multiple drug sponsors have been ... address specific questions during phase I/II. It’s not only ...
(Date:8/19/2014)... (PRWEB) August 20, 2014 One ... regenerative medicine is an inadequate vascular supply. Nutrient ... and decellularized tissues is critical for successful regeneration ... attempted to mitigate deficiencies in vascularization and promote ... scaffold bioactivity, optimizing scaffold design and architecture, and ...
Breaking Biology Technology:RENU 28 Skin Care Now Available in Australia and New Zealand 2Neurotrope To Host Conference Call 2Are Extractable and Leachables going Phase-Appropriate? New Webinar Hosted by Xtalks 2Vascularization in Tissue Engineering Highlighted at 12th New Jersey Symposium on Biomaterials Science 2
... Corporation (NYSE:,DHR) announced that President and Chief Executive ... the J.P. Morgan Healthcare Conference in,San Francisco on ... audio will be,simultaneously webcast on http://www.danaher.com . ... for one week., Danaher Corporation is a ...
... China Technology,Development Group Corporation (Nasdaq: CTDC; "the Company" ... products and solutions focusing on,solar energy business in ... ceremony to showcase the first SnO2 production line ... 2007., Accompanied by Mr. Alan Li, our ...
... 3 Neogen Corporation,(Nasdaq: NEOG ) announced today ... 2008, which ended Nov. 30, increased 34% from the ... net income in the,quarter rose to $0.22 per share, ... income of $3,254,000 set another quarterly,record for the 25-year-old ...
Cached Biology Technology:CTDC Holds a Ribbon Cutting Ceremony to Showcase First SnO2 Production Line 2CTDC Holds a Ribbon Cutting Ceremony to Showcase First SnO2 Production Line 3Neogen Reports 34% Increase in Net Income, 23% Increase in Revenues 2Neogen Reports 34% Increase in Net Income, 23% Increase in Revenues 3Neogen Reports 34% Increase in Net Income, 23% Increase in Revenues 4Neogen Reports 34% Increase in Net Income, 23% Increase in Revenues 5
(Date:8/20/2014)... spiciness that is irresistible to some, but intolerable to ... their findings to develop a new drug candidate for ... inflammation or other problems. They reported their progress on ... in ACS, Journal of Medicinal Chemistry . , ... had pegged a compound called capsaicin as the active ...
(Date:8/20/2014)... of honeybees grows to about 4,000 members, it triggers ... building of a special type of comb used for ... from the Department of Neurobiology and Behaviour at Cornell ... reproductive cycle of honeybee colonies. The results are published ... Nature . , Reproduction isn,t always a honeybee ...
(Date:8/19/2014)... made to decrease China,s increasing caesarean section rate, suggests ... BJOG: An International Journal of Obstetrics and Gynaecology (BJOG) ... delivery rates in the world. Of 16 million babies ... the exact rate is not known, the current Chinese ... caesarean rates ranging from 36% to 58%. However, before ...
Breaking Biology News(10 mins):Worker bees 'know' when to invest in their reproductive future 2Is China's 50 percent cesarean section delivery rate too high? 2Is China's 50 percent cesarean section delivery rate too high? 3
... WASHINGTON, Sept. 26 2007 -- Consuming large amounts of ... used painkillers in the United States, could potentially cause ... in the Oct. 15 print issue of ACS Chemical ... could occur not only from drinking caffeinated beverages while ...
... said today that the discovery of 11 new animal and ... the importance of conservation efforts in the ancient tropical forests ... tropical forests of a region known as Vietnams Green Corridor, ... well as three other plants new to science and exclusive ...
... sensing the magnetic reference direction, have recently been found ... PNAS, 2004). Furthermore, studies investigating what parts of a ... their magnetic compass showed that the cryptochrome-containing neurons in ... et al., PNAS, 2005; Liedvogel et al., EJN, 2007) ...
Cached Biology News:Mixing large doses of both acetaminophen painkiller and caffeine may increase risk of liver damage 2New animal and plant species found in Vietnam 2
Sf21 Insect Cells (Live) in Max-XP Medium...
... The BioGenex Super Sensitive ... is a novel product ... non-biotin polymeric technology. This ... signal to noise ratio ...
Artisan™ Wash Solution (x 50) Additional Information: EU regulatory status: CE US regulatory status: IVD ...
MiniCycler thermal cycler with Hot Bonnet heated lid, holds 25x0.2ml tubes...
Biology Products: