Neymar continues to spark talk of a possible return to Barcelona, but Camp Nou legend Lobo Carrasco is opposed to the idea of re-signing the Brazilian from Paris Saint-Germain.Amid a flurry of activity behind the scenes in Catalunya, a move for a former favourite has been mooted.The Liga champions are open to the idea of bringing Neymar back from France, if certain criteria are met, while the South American is eager to retrace his steps. Article continues below Editors’ Picks ‘Everyone legged it on to the pitch!’ – How Foden went from Man City superfan to future superstar Emery out of jail – for now – as brilliant Pepe papers over Arsenal’s cracks What is Manchester United’s ownership situation and how would Kevin Glazer’s sale of shares affect the club? Ox-rated! Dream night in Genk for Liverpool ace after injury nightmare Carrasco, though, feels that Barca should be targeting other options.He is in favour of completing a deal for Atletico Madrid striker Antoine Griezmann that has been discussed for some time, but would prefer to see any further funds invested elsewhere.A man who spent 11 years as part of the first-team fold at Camp Nou between 1978 and 1989 told El Chiringuito: “I do not want Neymar to come in.“I want Griezmann, a centre-back, a left-back and a centre-forward to come in.“That’s my road map and I would not change it, whether I’m [Josep Maria] Bartomeu, [Lionel] Messi, sports director or coach.”Carrasco believes Barcelona’s inability to challenge for the Champions League crown again in 2018-19 has highlighted the need to prioritise defensive additions.Ernesto Valverde’s side squandered a commanding semi-final first-leg lead against Liverpool to bow out of Europe once more, and Neymar is not considered to be the answer.“With the signing of Neymar, Barca would lose even more at the back,” added Carrasco.“They were swept in Europe, they [Liverpool] got us 4-0, 3-0.“If we have a further breakdown in defence, are we going to go from four to six goals?”Carrasco believes he has the answer for Barcelona, but the challenge facing the Blaugrana is not an easy one to complete.It is suggested that they require another talismanic presence at the back, one cut from the same cloth as a former academy graduate who went on to skipper the club and lead by example.“Barca needs to have a Puyol,” said Carrasco.Whether the Liga giants look to find that kind of player, having previously been linked with Ajax centre-half Matthijs de Ligt, remains to be seen, with attacking reinforcements seemingly the priority at present.
Bowling Green quarterback Jarret Doege entered the transfer portal earlier this month. Today, he announced where he’s heading next year.Doege committed to West Virginia, where he will have two seasons of eligibility remaining. According to WVSports.com, there’s a chance Doege could apply for an NCAA waiver to suit up immediately for the Mountaineers in 2019.If not, he will have to sit out the 2019 season and be eligible in 2020. West Virginia is currently looking for a new starter after losing Will Grier to the NFL.If Doege is able to play in 2019, he will compete with fellow transfer Austin Kendall (Oklahoma) and incumbent backup Jack Allison for the starting role.“Country roads!! Take me home!! Excited for this opportunity, and I can’t wait to be a part of Mountaineer Nation!” Doege wrote in his Twitter announcement.Country roads!! Take me home!! Excited for this opportunity, and I can’t wait to be apart of Mountaineer Nation! #HailWV pic.twitter.com/kLKrtUkGDK— Jarret Doege (@DoegeJarret) May 16, 2019Doege started all 12 games for BGSU last season, throwing for 2,660 yards, 27 touchdowns and 12 interceptions.As a freshman in 2017, he appeared in seven contests, throwing for 1,381 yards, 12 touchdowns and three interceptions.
Mezcal Unión Takes a People-First Approach to Making Spirits Editors’ Recommendations Professional Climber Adrian Ballinger on the Savage Mountain, No-Oxygen Climbing, and YouTube There are people who build houses, and then there are people who build serious houses. Mike Daddio falls into the second category. Growing up in the industry he never recalls a dinner table conversation that didn’t involve construction. In high school he worked for his dad on site doing everything from clean up to carpentry and upon graduating from college he started his own company with a partner, Design Development, specializing in high end homes and interiors. We aren’t talking suburban sheet rock debacles, we are talking homes that require plasterers, mill workers, stone and tile installers in pre war luxury condos in Manhattan and palatial estates on the East End.“The best thing about what I do is that I meet interesting people, help guide them down the right path and see the process all the way through!” Daddio told us over the phone from his hotel in Germany where he is taking a much needed break. He continued, “It’s fast paced and dynamic and can be a lot of fun. I couldn’t imagine doing anything else.”We took a little more of vacation time to hear more about what a contractor to the 1% wears on a daily basis.My work attire has always been tailored to going to construction sites, managing my men and still being presentable enough to interact with my clients. Since moving to DUMBO I have definitely up’d my game from Timberlands to Red Wing boots.I wear jeans daily from Big Star and a belt I got from my dad. Shirts are typically J. Crew although I was recently introduced to Scotch & Soda and I am a big fan. When I have to be a bit more professional I throw on a blazer from J.Crew and a pair of khakis from McLaughlin.On the weekends I’ll wear the same pair of jeans with my New Balances and throw on a tee. I wear a lot of shirts from The Vanity Project, a non-profit I work with. I also wear tees from a line I discovered in the Galapagos called Lonesome George.I ride a Vespa around town so I always have a Barbour jacket on hand in case it starts raining. I am not a big watch person but my girlfriend bought me a Timex and when I do wear it I have a variety of bands to change out to make it look fresh.I am a big golfer but I haven’t updated my golf look since college days so I go for J. Crew khakis a Fidra shirt and Foot Joy original classics. For the gym it’s a Hanes tee but sadly work has been so busy I haven’t seen the gym in nearly two years! SNL’s Kyle Mooney Never Had a Real Job and He’s Cool With That The Best Documentaries on Netflix Right Now How to Escape an Alligator Attack
zoom London-based private equity company 3i Group and its Eurofund V have sold their 100 pct holding in the Danish ferry operator Scandlines to a consortium consisting of First State Investments and Hermes Investment Management for EUR 1.7 billion (USD 2.1 billion).Scandlines said that 3i has decided to reinvest in the Ro-Pax company and acquire 35 pct stake in conjunction with First State Investments which will hold 50.1 percent and Hermes Investment Management, which will hold the remaining 14.9 percent.Net cash proceeds to 3i following the reinvestment will be EUR 347 million (USD 430 million), and are expected to be received in the first quarter of 2019 fiscal year.As explained by Peter Wirtz, a partner at 3i Germany, during the company’s investment period dating back to 2007, Scandlines has been transformed from a state-owned company into an important infrastructure asset that provides services on the key transport corridors between Denmark and Germany.Between 2012 and 2016, the shipping company has invested EUR 365 million in green technology, new ferries and upgrading of port and terminal facilities, Wirtz added, noting that green technology will be high on the company’s future investment agenda.3i, and funds managed by 3i, initially acquired a 40pct stake in Scandlines in 2007. They bought a further 10 pct stake from Deutsche Seerederei in 2010 and acquired the remaining 50 pct from Allianz Capital Partners in November 2013.The sale was confirmed to World Maritime News back in December 2017, with Rothschild investment bank being mandated to explore the potential sale of the Danish ferry operator.Scandlines operates two high-frequency routes between Germany and Denmark (Puttgarden-Rødby and Rostock-Gedser).The company’s fleet comprises eight ferries, resulting in more than 42,000 departures annually.World Maritime News Staff
New Delhi: A man was crushed to death by a speeding car being driven on the wrong side of the road near Connaught Place early on Sunday, police said. According to the police, the accident occurred in the early hours of Sunday when the deceased, identified as Dheeraj, 35, was walking by the road near Free Church in Parliament Street area. “A speeding black colour car crushed Dheeraj and sped away from the spot. Dheeraj was later taken to a nearby hospital where he was declared brought dead. During investigation, it was found that Dheeraj stayed in Free Church quarters. We are scanning the CCTV footage to nab the culprit,” police said.
VANCOUVER – Turquoise Hill Resources Ltd. says Oyu Tolgoi LLC has received an information request from Mongolia’s anti-corruption authority.The company says the regulator is seeking financial information relating to Oyu Tolgoi.The request relates to an investigation about possible abuse of power by officials during negotiation of the 2009 Oyu Tolgoi investment agreement, Turquoise Hill says.The company says there is no indication in the request to suggest that Oyu Tolgoi is a subject of the investigation.Turquoise Hill holds a 66 per cent stake in Oyu Tolgoi, while the Mongolian government owns 34 per cent.Rio Tinto holds a majority stake in Turquoise Hill.Companies in this story: (TSX:TRQ)
Gopalkrishna Gandhi was referring to the killing of the son of slain LTTE leader Vellupillai Prabakaran. (Colombo Gazette) However he noted the massacre of innocents at its denouement has compacted the gore of terror with the blood-thirst of revenge. Gopalkrishna Gandhi, the grandson of Mahatma Gandhi, says former President Mahinda Rajapaksa will be remembered for defeating the LTTE but the crimes committed during the war will also not be forgotten.Speaking at a ceremony held at the BMICH today to mark the first year of President Maithripala Sirisena’s term in office, Gopalkrishna Gandhi said that destiny chooses its agencies in mysterious ways and there is no doubt that history will accord to Rajapakse a place. “And the killing in cold blood of a child for the sole reason that he was his father’s son, has left the world in cold horror,” he added.
Photographer Anja Niedringhaus and reporter Kathy Gannon were shot in the Tani district of Khost province in eastern Afghanistan, according to a news release issued by UNAMA. Ms. Niedringhaus died in the attack, while Ms. Gannon is reported to be in stable condition.The two women were covering the country’s presidential and provincial council elections, which are set to take place on 5 April.“I am outraged by this terror attack on civilians,” said the Secretary-General’s Special Representative and head of UNAMA, Ján Kubiš. “The journalists were going about their work, informing the world how Afghan citizens are exercising their right to shape a better future for themselves, their children and their country.”He added that the attack is a “huge loss” for Afghanistan. “Both journalists were highly respected and were very well known for their professionalism, love and appreciation of the Afghan people and dedication to telling Afghanistan’s story.” UNAMA expressed its condolences to the family and colleagues of Ms. Niedringhaus and wished a speedy recovery for Ms. Gannon.
The deadline for feedback to be submitted on the Interim Report of the Human Rights Task Force is coming up soon.The Human Rights Task Force will be concluding its Interim Report community consultations this week. The Brock Community is invited to provide the Task Force with feedback using the online consultation form or by email at email@example.comThe final day to submit feedback is Wednesday, March 8.
Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)RelatedDuo arrested with illegal guns, ammoSeptember 24, 2017In “Crime”T&T police appeal for help as country records bloodiest January in historyJanuary 30, 2018In “latest news”108 murders recorded; 12% increase in serious crimesSeptember 11, 2015In “Crime” (Trinidad Guardian) More than 2,000 illegal firearms, mostly pistols and revolvers and approximately 37,000 rounds of assorted ammunition have been recovered by the police in the past 36 months.Most of the illegal guns come through the South American mainland originating from North America.This was disclosed yesterday by acting ASP Vernly Gift of the Organised Crime, Narcotics and Firearms Bureau (OCNFB) during the T&T Police Service’s weekly media briefing.Giving a breakdown, Gift said in total 2,158 firearms were recovered from January 2015 to August 2017, “In 2015, 691…in 2016, 765 and from January 2017 to August 31 2017, 702…of the nine divisions, the majority of seizures were made in the Northern, Western and Southern divisions.”Gift also said that during the period January 2016 to August 31 2016, a total of $109,637,067 in cocaine and marijuana were seized, while in 2017 during the same period, $30,727,305 were seized.He said that despite the fact that the T&T Police Service (TTPS) has had notable success in the recovery of illegal arms and ammunition, it is difficult to measure the quantity of firearms entering the country.“Whilst the threat of firearms is real and ever so evident, the effects of the narcotic scourge is equally as devastating and contribute to the loss and diminishing quality of life locally,” Gift said.With respect to marijuana eradication exercises, police have increased its initiative from 29 exercises in 2016 from January to August 31 to 41 exercises in the same period this year.“In 2016 233,330 fully grown trees were destroyed while this year same period 1,108,737 fully grown trees were destroyed…a 41 per cent increase in exercises and 375 per cent increase in trees being destroyed,” Gift said.When asked if the Police Service had full co-operation with the Customs and Excise Division with respect to carrying out exercises at the respective ports of entry throughout T&T, Gift replied: “Yes. We often have meetings and they are fully cooperative”He, however, could not give any statistics with regards to the amount of illegal firearms and narcotics seized from those respective ports of entities.“The effort in drug supply reduction by local agencies such as Customs and Excise, T&T Coast Guard, security agencies at all ports of entry should not go unnoticed and for this the TTPS commends them for their efforts,” Gift said.
GARDAÍ ARE SEARCHING for two “hooded suspects” following a shooting in Limerick last night.A 26-year-old man is currently in hospital being treated for gunshot wounds to the stomach.The victim was shot at about 9.30pm at Byrne Avenue in Prospect. He was taken to University Hospital Limerick where his injuries have been described as not life-threatening.Investigating gardaí arrested a 28-year-old and are questioning him at Roxboro station.The suspects fled in the direction of Lenihan Avenue. An appeal for witnesses has been issued and anyone with information is asked to contact 061 214 4340 or the Confidential Line on 1800 666 111.Read: Man injects himself in the groin on the LuasToday: ‘Clear and convincing evidence’ that chemical weapons used in Syria
Vacciner aussi les garçons contre les papillomavirus ?Vendredi, les autorités sanitaires américaines ont pour la première fois suggéré que les garçons âgés de 11 et 12 ans, soient vaccinés contre les papillomavirus humains (HPV). Si le vaccin contre le col de l’utérus fait l’objet d’un vif débat sanitaire, il est aujourd’hui administré à de nombreuses jeunes filles. Il vise ainsi à les protéger contre les agents responsables de certains de ces cancers, les papillomavirus humains (HPV) avec lesquels elles peuvent entrer en contact au cours des rapports sexuels. Toutefois, les filles ne sont pas seules à s’exposer à un tel risque. Les papillomavirus sont également responsables de verrues cutanées, d’infections génitales voire de cancer oral ou anal. Des maladies qui touchent également les hommes. À lire aussiMaladie de Charcot : symptômes, causes, traitement, où en est on ?Ainsi, la possibilité de vacciner également les garçons contre ces virus avait déjà fait l’objet de recherches mais ne s’était pas concrétisée, du moins jusqu’ici. En effet, les Centres fédéraux de contrôle et de prévention des maladies (CDC) aux Etats-Unis viennent pour la première fois de recommander une telle vaccination chez les garçons âgés de 11 et 12 ans. Les experts américains espèrent ainsi que cette mesure, conjuguée à la vaccination des filles de la même classe d’âge, permettra de réduire significativement le taux d’infection au sein de la population américaine, rapporte l’AFP.D’après les recherches, environ la moitié des adultes sexuellement actifs contracteront un jour ou l’autre un papillomavirus dont il existe une centaine de variétés. Or, si la plupart de ces virus sont éliminés par l’organisme, certains s’avèrent plus résistants que d’autres et peuvent provoquer de sérieuses affections. La vaccination permet ainsi de mieux armer l’organisme contre ces virus qui parvient alors plus facilement à les neutraliser. Néanmoins, dans une étude publiée en 2009 dans le British Medical Journal, des chercheurs avaient estimé que vacciner les jeunes filles suffisaient à diminuer le risque et à limiter la prolifération des virus. Selon les CDC, en 2010, 20% des Américaines âgées de 19 à 27 ans étaient vaccinées contre les HPV, soit un peu plus que les 17,6% enregistrés l’année précédente. Le 6 février 2012 à 15:10 • Maxime Lambert
Facebook Twitter Google+LinkedInPinterestWhatsApp Related Items:ex price club employees takes case to labor tribunal, Gus Karagianis, Price club closes, terminated workers still protesting Facebook Twitter Google+LinkedInPinterestWhatsAppProvidenciales, TCI, August 23,2016 – The conciliation process at the Labour Department for the still protesting ex-employees of the now closed Price Club was a bust. Magnetic Media learned that Gus Karagianis did not show up for the sessions with the Commissioner of the Employment Services of TCIG and it has left nearly 20 men destitute. In a follow up yesterday on the matter, which began three weeks ago and which continues to spawn demonstrations at the parking area of the now, Payless Grocery store, Magnetic Media learned that there have been 14 cases filed at the Labour Tribunal and that 11 of the Haitian men, who worked as long as 18 years at Price Club but were let go without severance pay, have hired attorney Peter McKnight.Gus could be facing a whopping payout if the men win their case. The plaintiffs showed us the letter they received on July 17, 2016 to say the store was suffering too much loss and was unable to compete in the current market; the letter told them the company would not rebound and will open for the final time on Sunday August 7, 2016. The problem here is, by law, there should be a two month notice and because there was not, the men are owed that two months of salary. Add to this, the Employment Ordinance 2014 explains that the plaintiffs are supposed to be paid two weeks for every year once they had been employed at Price Club for two years. One man showed us what the Labour Department calculated as owing to him; it was over $16,000 and he had only been employed since 2011… the staff who were on for 18 years will be entitled to far more. Again, the case is now with the Labour Tribunal.
Niall McGinn says Northern Ireland must take the positives from their disappointing UEFA Nations League campaign.McGinn insists the team’s 2-1 defeat to Austria sums up their disappointing outing in the Nations League.Despite looking competitive in patches against Austria, just as they did in previous group games against Austria and Bosnia, Northern Ireland ended up with nothing.Northern Ireland’s position in the group doesn’t make for good reading as they have played four and lost four.But at times Michael O’Neill’s side have done well against both opponents before eventually losing the games.“I think it sums up the Nations League in general where we performed well, created chances without putting the ball in the net,” McGinn said, according to NewsLetter.England and Bulgaria on a collision course over racism George Patchias – September 13, 2019 England’s concerns over racism in Bulgaria has sparked a furious row.Recently England manager Gareth Southgate expressed his concern over racist abuse being aimed at…“We were the team tonight in the ascendancy and we looked as if we could go on and win it.“But all-in-all it just shows when you make a mistake, or things are maybe not going your way and then you are punished by a great finish that you get from great opposition.”“There are times you get punished and more or less we were punished by the last kick of the ball.”“There are maybe times in this campaign that we have played a lot better than we did in the Euro 2016 campaign, when we may be hung in there at times to get the right results. And, at the end of the day, this is a results-based business and you have to win games and that breeds confidence.”“The confidence is always there in the squad and the performances have shown that, but maybe the final ball or getting ahead in games and holding out is what we are missing.”“We are disappointed with the result but we have to take the positives from the performances in the campaign.”
Bruce Shelley with HEA: “We want to let our members know that the best thing that they can do when they receive a phone call like this, that is suspicious, is hang up and call directly back to Homer Electric. That is your best course of action to make sure it is a valid call from the utility.” According to a release from HEA, there has been a recent report of an individual, posing as an HEA representative, confronting local businesses in person and threatening to disconnect their power if payment is not made immediately. Facebook0TwitterEmailPrintFriendly分享Homer Electric Association, Inc. is getting reports again from area businesses regarding suspicious HEA impersonators over the phone – as well as in person. The goal of the scammers is to obtain credit card numbers or other financial information and payment.If a suspicious phone call is received, end the phone call and contact HEA for verification and to checkthe status of your account. In addition, business members have received phone calls from fraudulent callers impersonating a utilityrepresentative and requesting payment for the customer’s supposed past due bill. The fraudulent callerthreatens immediate disconnection of electric service if the bill is not paid. If you have questions or need additional information, call 1-800-478-8551.
The Recipes app is an extension of the magazine’s food column, the company says. Meanwhile, the Reader’s Choice app builds off the issue’s “2010 Photo Contest” feature and the Travel Guide is an interactive connection to a feature story on the Dominican Republic.All four apps were created in-house, Tauber says. For the Pictures app, Islands editors utilized the iPhone SDK developer program, which is commonly used by developers to create iPad, iPhone and iPod touch applications.“Response has exceeded expectations, with a solid rise in downloads for the Pictures app coming when we soft-launched it on Islands.com and Islands.com/Facebook,” says Tauber. “In terms of scans, the Recipes app is winning so far.”Earlier this year, Bonnier’s Wakeboarding and Sport Driver also utilized Microsoft’s HCCB tagging technology to direct readers online for additional interactive content.Tauber says Islands so far isn’t charging for the Pictures app in Apple’s iTunes Store but says it will experiment with different pricing models with future apps. “Right now we’re focusing on learning how to best use and execute them and gathering metrics that we can then share with clients,” he says. The team at Bonnier’s Islands magazine took some cues from sister title WakeBoarding when they put together their June issue which integrates tagging technology with mobile apps. Readers are able to access four apps developed by Islands editors by using a smartphone to scan 2-D barcodes within the issue’s pages.The cover features an app icon and URL for a “Pictures” app the Islands edit team created that is available exclusively in the Apple iTunes Store. It offers users a gallery of island photography, photo quizzes, and a photo feed of editors’ travels. The app also was promoted inside the magazine on the editor’s letter page, in a house ad and in a feature story.The magazine also used 2-D barcodes, created using Microsoft’s High Capacity Color Barcode technology, to unlock three free Web-based apps: Islands Recipes, Islands Reader’s Choice and Islands Travel Guide: Dominican Republic. “For this particular issue, each of the three Web apps organically fit as an extension of what was in the magazine,” Islands brand manager Chris Tauber says. “And repurposing content or drawing on previous research was fairly efficient for us in each of these cases.”
Moscow: A passenger jet made an emergency landing in a field outside of one of Moscow’s airports Thursday after colliding with a flock of birds, injuring at least 23 people, Russian officials said. The Ural Airlines A321 carrying 226 passengers and a crew of seven hit the birds as it took off Thursday from Moscow’s Zhukovsky airport en route for Simferopol, in Crimea. Also Read – Watch: Donald Trump says Florida faces absolute monster hurricane Advertise With Us The airline said in a statement that the birds got into both of the plane’s engines, causing a malfunction. The pilot then made an emergency landing in a cornfield about 1 kilometer (half a mile) from the airport. Russian health authorities said 23 people, including five children, have been hospitalised with injuries. Ural Airlines lauded the crew for its professionalism in arranging the evacuation. Footage from the scene showed the flight commander directing the passengers to walk away from the plane across the cornfield.
Members of Bangladesh Army held a leader of United People’s Democratic Front (UPDF) along with arms and ammunition at Noapara in Mahalchhari upazila in Khagrachhari early Tuesday, reports news agency UNB.Tipped off, a team of army personnel raided the house of Priti Bikash Chakma, 43, finance secretary of Mahalchhari unit UPDF, and arrested him, said Major Mohammad Mujahidul Islam, a staff officer of Khagrachhari region.They also recovered two pistols, eight bullets and two mobile phone sets from his possession.The arrestee was handed over to Mahalchhari police.
On Friday’s Houston Matters: We bring you the latest on the shooting at Santa Fe High School. At least eight people were killed at a shooting that occurred Friday (May 18) morning at the school in Galveston County, according to multiple media outlets, including the Houston Chronicle, that are citing law enforcement sources.Also this hour: We learn how schools and law enforcement prepare to respond to these events. Dr. Phillip Lyons is dean of the Criminal Justice Department at Sam Houston State University. He’s also a former police officer and detective. And Kelly LeDuff is co-owner of Open Eyes security consultants. We also offer a free daily, downloadable podcast here, on iTunes, Stitcher and various other podcasting apps. This article is part of the Houston Matters podcast Share Listen To embed this piece of audio in your site, please use this code: X 00:00 /50:17
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. A research group in the UK has crafted a source of single photons – photons emitted one by one – with a convenience and ease of use they liken to “plug and play” computer hardware devices. This is a key step forward in single-photon production, which is essential to successful, secure quantum communication, the transmission of data using individual photons to carry bits of information. Quantum sensor breakthrough using naturally occurring vibrations in artificial atoms Citation: ‘Plug and Play’ Source of Single Photons (2007, March 15) retrieved 18 August 2019 from https://phys.org/news/2007-03-source-photons.html A sketch of the single-photon source with the integrated optical-fiber bundle. The quantum-dot wafer is mounted onto the sample holder (right inset) with the fiber bundle attached directly to its top surface. The “WDM” is the beamsplitter. Explore further The device’s plug-and-play quality lies in its novel design. A bundle of optical fibers is coupled with – or “plugged into,” so to speak – a wafer patterned with quantum dots. Quantum dots are tiny atom clusters of a semiconducting material, such as silicon, that contain as few as a hundred atoms and play a key role in many single-photon-production schemes. In this case, they emit photons when excited with laser light.“Pairing the optical fiber bundle and the quantum-dot wafer presents a way to implement real quantum communication that other single-photon sources do not have,” said lead researcher Xuilai Xu, a scientist at Hitachi Europe Ltd. in Cambridge, to PhysOrg.com. Xu and his colleagues at Hitachi performed the study in collaboration with researchers at the University of Cambridge.The wafer is mounted onto a sample holder, immersed in liquid helium, and then excited with a laser. During this process, the dots’ atoms absorb the laser photons and jump to a higher energy state, but almost instantly re-emit the photons and return to a lower-energy state. The emitted photons travel through the fiber bundle to a beamsplitter, which sends the emitted photons out one fiber and the residual laser photons out another.Accurately determining if the source produced single photons was a tricky task. Xu and his colleagues had to use several devices to analyze the emitted photon signal. These included a spectrometer, which measured the intensity of the light, and two single-photon-counting “photodiodes,” semiconductor devices used to detect light. They also applied a filter to subtract out background photons, ensuring that the photons emitted from the quantum dots were not mixed with photons emitted from the wafer’s “wetting layer,” a thin layer of residue formed on the surface of the dots as the wafer was created.Analysis of the data produced by the measurement and detection devices showed that the photons tended not to be emitted in pairs. And, according to the researchers’ calculations, the addition of the filter, when it was placed at the proper angle, greatly reduced the probability that photon counters would detect more than one photon at once – specifically, the likelihood of this was reduced 100-fold.“This indicates a nearly ideal single-photon source,” said Xu.To test the stability of their design, the group measured the photons emitted from 27 quantum dots, traveling through different optical fibers in the bundle, over a 24-day period. The results showed the photon source to be stable over a timescale of weeks, with no evidence that a considerably longer period would result in degradation.Citation: Xiulai Xu, Ian Toft, Richard T. Phillips, Jonathan Mar, Kiyotaka Hammura, and David A. Williams, “’Plug and play’ single-photon sources.” Appl. Phys. Lett. 90 061103 (2007)Copyright 2007 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com.