(Press-News.org) Physicists at The City College of New York have developed a technique with the potential to enhance optical data storage capacity in diamonds. This is possible by multiplexing the storage in the spectral domain. The research by Richard G. Monge and Tom Delord members of the Meriles Group in CCNY’s Division of Science, is entitled “Reversible optical data storage below the diffraction limit” and appears in the journal Nature Nanotechnology.
“It means that we can store many different images at the same place in the diamond by using a laser of a slightly different color to store different information into different atoms in the same microscopic spots,” said Delord, postdoctoral research associate at CCNY. “If this method can be applied to other materials or at room temperature, it could find its way to computing applications requiring high-capacity storage.”
The CCNY research focused on a tiny element in diamonds and similar materials, known as “color centers.” These, basically, are atomic defects that can absorb light and serve as a platform for what are termed quantum technologies.
“What we did was control the electrical charge of these color centers very precisely using a narrow-band laser and cryogenic conditions” explained Delord. “This new approach allowed us to essentially write and read tiny bits of data at a much finer level than previously possible, down to a single atom.”
Optical memory technologies have a resolution defined by what's called the "diffraction limit," that is, the minimum diameter that a beam can be focused to, which approximately scales as half the light beam wavelength (for example, green light would have a diffraction limit of 270 nm). “So, you cannot use a beam like this to write with resolution smaller than the diffraction limit because if you displace the beam less than that, you would impact what you already wrote. So normally, optical memories increase storage capacity by making the wavelength shorter (shifting to the blue), which is why we have "Blu-ray" technology,” said Delord.
What differentiates the CCNY optical storage approach from others is that it circumvents the diffraction limit by exploiting the slight color (wavelength) changes existing between color centers separated by less than the diffraction limit. “By tuning the beam to slightly shifted wavelengths, it can be kept at the same physical location but interact with different color centers to selectively change their charges -- that is to write data with sub-diffraction resolution,” said Monge, a postdoctoral fellow at CCNY who was involved in study as a PhD student at the Graduate Center, CUNY.
Another unique aspect of this approach is that it’s reversible. “One can write, erase, and rewrite an infinite number of times,” Monge noted. “While there are some other optical storage technologies also able to do this, this is not the typical case, especially when it comes to high spatial resolution. A Blu-ray disc is again a good reference example -- you can write a movie in it but you cannot erase it and write another one.”
CCNY researchers publish optical data storage breakthrough in Nature Nanotechnology
ELSE PRESS RELEASES FROM THIS DATE:
Diet has a major impact on risk of Alzheimer’s disease
December 4, 2023 San Francisco, CA: In a detailed study, Diet’s Role in Modifying Risk of Alzheimer’s Disease: History and Present Understanding published in the Journal of Alzheimer’s Disease, we can finally see which diets are helpful in reducing the risk of developing Alzheimer’s disease. The role of diet in modifying the risk of Alzheimer’s disease is discussed in detail. Diets that are more plant based, like the Mediterranean diet and traditional diets in China, Japan, and India, are shown to reduce risk, especially ...
Study shows how ethical brands fare in a recession
Peer reviewed - observational study - people A new study from the University of East Anglia reveals why some ‘eco goods’ may fare better than others as a UK recession looms. A new study, published today, shows that when money gets tight, people are more likely to keep up more expensive ethical purchases like buying fair trade products. The study is one of the first to look at ethical purchases using actual market data from a major UK supermarket chain. Lead researcher Dr Jibonayan Raychaudhuri, from UEA’s School of Economics, said: “As a possible UK recession looms closer, we wanted to better understand how people’s spending ...
New technique efficiently offers insight into gene regulation
Researchers from the group of Jop Kind developed a new technique called MAbID. This allows them to simultaneously study different mechanisms of gene regulation, which plays a major role in development and disease. MAbID offers new insights into how these mechanisms work together or against each other. The results were published in Nature Methods on the 4th of December. DNA is the most important carrier of genetic information. Each cell contains approximately two meters of DNA. To ensure that all this genetic material fits into the small cell nucleus, it must be tightly packed. The DNA is therefore wrapped around a special type of protein, a histone. The ...
U of M Medical School study finds visions of nonphysical world are common among cognitively healthy Ojibwe individuals
MINNEAPOLIS/ST. PAUL (12/04/2023) — Visual hallucinations are common among people with Lewy body dementia and other types of dementia. Identifying visual hallucinations is an important component of a wide variety of medical and psychiatric diagnoses and treatments, but without cultural context, some patients’ symptoms can be misinterpreted or misdiagnosed. In existing medical literature, there is almost no information regarding normal spiritual experiences in American Indian participants in the context of a neurocognitive evaluation. University of Minnesota Medical School researchers sought to understand how Ojibwe culture and spirituality affect a doctor’s assessment ...
Consistency key to corporate expressions of racial solidarity
ITHACA, N.Y. – Why do some corporate expressions of solidarity with marginalized groups register as genuine, while others seem performative or even backfire? An analysis of statements by Fortune 500 companies following the 2020 police killing of George Floyd finds that costly actions, such as donating money to social justice groups, aren’t enough to convey allyship to Black Americans. Companies must also demonstrate a consistent, long-term commitment to diversity and racial equity, according to research co-authored by James T. Carter, assistant ...
How mountains affect El Niño-induced winter precipitation
COLUMBUS, Ohio – A consideration of how mountains influence El Niño and La Niña-induced precipitation change in western North America may be the ticket to more informed water conservation planning along the Colorado River, new research suggests. The study, coinciding with a recent shift from a strong La Niña to a strong El Niño, brings a degree of precision to efforts to make more accurate winter precipitation predictions in the intermountain West by comparing 150 years of rain and snow data with historic El Niño-Southern Oscillation patterns. Overall, the analysis shows ...
ECHO research examines nutrition data's value from pregnancy to adolescence in understanding child health
Collaborative ECHO research led by Megan Bragg, PhD, RD and Kristen Lyall, ScD of the A.J. Drexel Autism Institute highlights the opportunity for researchers to access the large amount of diet information already collected from the ECHO Cohort. This research, titled “Opportunities for examining child health impacts of early-life nutrition in the ECHO Program: Maternal and child dietary intake data from pregnancy to adolescence”, is published in Current Developments in Nutrition. This study aimed to describe dietary intake data available in the ...
Training the immune system to prevent cancer – NextGen researchers discover paradigm-shifting approach
As one of the most insidious diseases in the world, cancer has few treatments that work to eradicate it completely. Now, a new ground-breaking approach pioneered by two researchers working at the University of Missouri’s Roy Blunt NextGen Precision Health building shows promising results in preventing lung cancer caused by a carcinogen in cigarettes — a discovery that immunologists Haval Shirwan and Esma Yolcu rank among the most significant of their careers. In the new study, Shirwan and Yolcu designed a molecule — known as an immune checkpoint stimulator (SA-4-1BBL) ...
Snail-inspired robot could scoop ocean microplastics
ITHACA, N.Y. – Inspired by a small and slow snail, scientists have developed a robot protype that may one day scoop up microplastics from the surfaces of oceans, seas and lakes. The robot’s design is based on the Hawaiian apple snail (Pomacea canaliculate), a common aquarium snail that uses the undulating motion of its foot to drive water surface flow and suck in floating food particles. Currently, plastic collection devices mostly rely on drag nets or conveyor belts to gather and remove larger plastic debris from water, but they lack the fine scale required for retrieving microplastics. These tiny particles of plastic can be ingested ...
Georgia State professor granted $5 million to identify and characterize objects in space
ATLANTA — Georgia State Professor of Physics & Astronomy Stuart Jefferies has been awarded a $5 million, multi-institutional grant by the U.S. Air Force to develop techniques to detect, map and image faint objects in space. The work could have far-reaching impacts, including strengthening national security in an increasingly congested space domain. The work will also advance the next generation of exceptionally large telescopes and improve the capabilities of astronomers studying the universe by providing images that are significantly sharper than those from existing telescopes. “Detecting objects in the space region between where ...