(Press-News.org) South Korean researchers have successfully developed technology to mass-produce quantum dot lasers, widely used in data centers and quantum communications. This breakthrough paves the way for reducing the production cost of semiconductor lasers to one-sixth of the current cost.
Electronics and Telecommunications Research Institute (ETRI) announced that they have developed, for the first time in Korea, technology to mass-produce quantum dot lasers, previously only used for research, using Metal-Organic Chemical Vapor Deposition (MOCVD) systems.
The ETRI Optical Communication Components Research Section has successfully developed indium arsenide/gallium arsenide (InAs/GaAs) quantum dot laser diodes on gallium-arsenic (GaAs) substrates, which are suitable for the 1.3 µm wavelength band1) used in optical communications.
1) Optical Communication Wavelength Band (1260~1360nm)
Traditionally, quantum dot laser diodes were produced using Molecular Beam Epitaxy (MBE), but this method was inefficient due to its slow growth speed, making mass production challenging. By utilizing MOCVD, which has higher production efficiency, the research team has significantly enhanced the productivity of quantum dot laser manufacturing. Quantum dot lasers are known for their excellent temperature characteristics and strong tolerance to substrate defects, allowing for larger substrate areas and consequently lower power consumption and production costs.
The newly developed quantum dot manufacturing technology boasts high density and good uniformity. The produced quantum dot semiconductor lasers demonstrated continuous operation at temperatures up to 75 degrees Celsius, showing a world-leading achievement in the results obtained via MOCVD.
Previously, optical telecommunication devices used expensive 2-inch indium phosphide (InP) substrates, resulting in high manufacturing costs. The new technology, using GaAs substrates, which are less than one-third the cost of InP substrates, is projected to reduce the manufacturing cost of communication semiconductor lasers to less than one-sixth.
This technology's ability to use large-area substrates enables significant reductions in process time and material costs.
The research team plans to further optimize and verify this technology to enhance its reliability and transfer it to domestic optical communication companies. These companies will receive key technology and infrastructure support through ETRI's semiconductor foundry, accelerating the commercialization timeline.
The anticipated reduction in development time and production costs will enhance product price competitiveness, potentially increasing market share internationally. This advancement is expected to boost the domestic optical communication component industry.
In modern society, optical communication serves as the backbone of our industry. The research team's achievement is set to revolutionize the development of optical sources, connecting apartment complexes to large cities and undersea optical cables.
Professor Dae Myung Geum from Chungbuk National University, a participant in this research, remarked, “The mass production technology for quantum dots can significantly lower the production costs of high-priced optical communication devices, enhancing the competitiveness of the national optical communication component industry and contributing substantially to basic science research.”
Dr. Ho Sung Kim from ETRI's Optical Communication Components Research Section stated, “This research outcome is a prime example of securing both commercial viability and fundamental innovation, potentially changing the paradigm of the semiconductor laser industry for optical communications.”
###
This achievement was made possible through ETRI's basic project, “ICT Creative Technology Development,” and has been published in a recent international SCI journal2).
2) SCI Journal Article Title: “High-temperature continuous wave-operation of all MOCVD grown InAs/GaAs quantum dot laser diodes with highly strained InGaAs layer and low temperature p-AlGaAs cladding layer” - Top 10%, “Journal of Alloys and Compounds”, 983(2024) 173823 (JCR IF 6.2)
About Electronics and Telecommunications Research Institute (ETRI)
ETRI is a non-profit government-funded research institute. Since its foundation in 1976, ETRI, a global ICT research institute, has been making its immense effort to provide Korea a remarkable growth in the field of ICT industry. ETRI delivers Korea as one of the top ICT nations in the World, by unceasingly developing world’s first and best technologies.
END
ETRI pioneers mass production of quantum dot lasers for optical communications
Reducing semiconductor laser production costs by 1/6 with quantum dot lasers for optical communications. Using 6-inch substrates instead of 2-inch: time reduction and mass production achieved
2024-06-28
[Attachments] See images for this press release:
ELSE PRESS RELEASES FROM THIS DATE:
Chemo drug may cause significant hearing loss in longtime cancer survivors
2024-06-28
TAMPA, Fla. (June 28, 2024) -- An interdisciplinary study led by researchers at the University of South Florida and Indiana University has uncovered significant findings on the long-term effects of one of the most common forms of chemotherapy on cancer survivors.
Published in the Journal of the American Medical Association Oncology, the study tracked a cohort of testicular cancer survivors who received cisplatin-based chemotherapy for an average of 14 years, revealing that 78% experience significant difficulties in everyday listening situations, negatively impacting their quality of life. This collaborative research is the first to measure real-world listening challenges and hearing ...
Study reveals why AI models that analyze medical images can be biased
2024-06-28
Artificial intelligence models often play a role in medical diagnoses, especially when it comes to analyzing images such as X-rays. However, studies have found that these models don’t always perform well across all demographic groups, usually faring worse on women and people of color.
These models have also been shown to develop some surprising abilities. In 2022, MIT researchers reported that AI models can make accurate predictions about a patient’s race from their chest X-rays — something that the most skilled radiologists can’t do.
That research team has now found that the models that are most accurate at making demographic predictions ...
New class of Mars quakes reveals daily meteorite strikes
2024-06-28
In brief:
For the first time, researchers use seismic data to estimate a global meteorite impact rate showing meteoroids the size of a basketball impact Mars on a near daily basis.
Impact-generated seismic signals show meteorite impacts to be 5-times more abundant than previously thought.
Seismic data offers a new tool, in addition to observational data, for calculating meteorite impact rates and planning future Mars missions
An international team of researchers, co-lead by ETH Zurich and Imperial College London, have derived the first estimate of global meteorite impacts on Mars using seismic data. Their findings indicate between 280 to 360 meteorites strike ...
Gene therapy halts progression of rare genetic condition in young boy
2024-06-28
When Michael Pirovolakis received an individualized gene therapy in a single-patient clinical trial at The Hospital for Sick Children (SickKids) in March 2022, the course of his condition was dramatically altered.
Michael has spastic paraplegia type 50 (SPG50), an “ultra-rare” progressive neurodegenerative disorder that causes developmental delays, speech impairment, seizures, a progressive paralysis of all four limbs, and typically fatal by adulthood. Approximately 80 children around the world ...
New predictors of metastasis in patients with early-stage pancreatic cancer
2024-06-28
Researchers at Weill Cornell Medicine with an international team have used liver biopsies to identify cellular and molecular markers that can potentially be used to predict whether and when pancreatic cancer will spread to an individual’s liver or elsewhere, such as the lung.
The study, published on June 28 in Nature Medicine, proposes that information from a liver biopsy—a small tissue sample collected for lab analysis—when pancreatic cancer is diagnosed may help guide doctors in personalizing treatment, such as liver-directed immunotherapies, before cancer cells have the chance to metastasize.
Only 10 percent of people with pancreatic ...
Climate change to shift tropical rains northward
2024-06-28
A study led by a UC Riverside atmospheric scientist predicts that unchecked carbon emissions will force tropical rains to shift northward in the coming decades, which would profoundly impact agriculture and economies near the Earth's equator.
The northward rain shift would be caused by complex changes in the atmosphere spurred by carbon emissions that influence the formation of the intertropical convergence zones. Those zones are essentially atmospheric engines that drive about a third of the world’s precipitation, Liu and his co-authors report in a paper published Friday, June 28, in the journal Nature Climate Change.
Tropical ...
City of Hope study suggests changing the gut microbiome improves health outcomes for people newly diagnosed with metastatic kidney cancer
2024-06-28
LOS ANGELES — Physician scientists from City of Hope, one of the largest cancer research and treatment organizations in the United States, found that people with metastatic kidney cancer who orally took a live biotherapeutic product called CBM588 while in treatment with immunotherapy and enzymatic tyrosine kinase inhibitors experienced improved health outcomes. The phase 1 trial was published today in Nature Medicine.
Microorganisms in the gut modulate the immune system. City of Hope researchers are now in discussions with the global SWOG Cancer ...
Surprising meteorite impact rate on Mars can act as ‘cosmic clock’
2024-06-28
Seismic signals have suggested Mars gets hit by around 300 basketball-sized meteorites every year, providing a new tool for dating planetary surfaces.
The new research, led by scientists at Imperial College London and ETH Zurich working as part of NASA's InSight mission, has shed light on how often ‘marsquakes’ caused by meteorite impacts occur on Mars.
The researchers found that Mars experiences around 280 to 360 meteorite impacts every year that produce craters larger than eight metres in diameter and shake the red planet’s ...
Air pollution exposure during childhood linked directly to adult bronchitis symptoms in new research
2024-06-28
A new study brings fresh revelations about the connection between early-life exposure to air pollution and lung health later in life. A research team led by the Keck School of Medicine of USC has shown that exposure to air pollution during childhood is directly associated with bronchitis symptoms as an adult.
To date, many investigations in the field have established intuitive links that are less direct than that: Air pollution exposure while young is consistently associated with lung problems during childhood — and childhood lung problems are consistently associated with lung issues as an adult.
The current study, published in the American Journal of Respiratory ...
Kids given ‘digital pacifiers’ to calm tantrums fail to learn how to regulate emotions, study finds
2024-06-28
Children learn much about self-regulation – that is affective, mental, and behavioral responses to certain situations – during their first few years of life. Some of these behaviors are about children’s ability to choose a deliberate response over an automatic one. This is known as effortful control, which is learned from the environment, first and foremost through children’s relationship with their parents.
In recent years, giving children digital devices to control their responses to emotions, especially if they’re negative, has ...
LAST 30 PRESS RELEASES:
NARO developed a novel method to analyze “forever chemicals” in the soil
Scientists pinpoint strategies that could stop cats from scratching your furniture
Offline/online attribute-based searchable encryption scheme from ideal lattices
Theoretical design and experimental verification of high-entropy carbide ablative resistant coating
Cultural adaptation of behavioral interventions in health promises more effective results for the population
New class of cancer mutations discovered in so-called ‘junk’ DNA
High ceilings linked to poorer exam results for uni students
Low-dose aspirin could help prevent pregnancy complications caused by flu infections
Splicing it all together in the fight against cancer
World’s first research journal dedicated to psychology and artificial intelligence announced
Zayed to lead new Division of Surgical Sciences
How dust pollution from shrinking Great Salt Lake affects communities disproportionately
Clever clothes! Seams in clothing capture body movement
AMS science preview: Maui wildfire, Salt Lake drying, traffic and weather
Research spotlight: Identifying genes to prolong an anti-tumor immune response
SRI is developing a new malaria treatment that aims to protect from the disease
UV radiation damage leads to ribosome roadblocks, causing early skin cell death
Precise and less expensive 3D printing of complex, high-resolution structures
AGS member, George Kuchel, appointed to serve on ACIP
Researchers awarded Department of Defense grant to study the role of gut microbiomes to improve outcomes in dystonia
Advancing toward a preventative HIV vaccine
A Global Heat Early Warning system is now essential, and requires planning in four key areas to overcome barriers and enable successful implementation, per new review
An alternative way to manipulate quantum states
Study reveals new factor associated with the risk of severe COVID-19 in people with obesity
Study finds that influential people can play a valuable role in getting people to act in the best interest of society
Editorial: Genomics has more to reveal
COVID-19 pandemic tied to low birth weight for infants in India, study shows
Welch Foundation supports UTA’s drug delivery innovations
Treatment with a mixture of antimicrobial peptides can impede antibiotic resistance
The Mediterranean Diet is linked to lower risk of mortality in cancer survivors
[Press-News.org] ETRI pioneers mass production of quantum dot lasers for optical communicationsReducing semiconductor laser production costs by 1/6 with quantum dot lasers for optical communications. Using 6-inch substrates instead of 2-inch: time reduction and mass production achieved