PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

IEEE study achieves efficient integration of quantum dot lasers on silicon chiplets

Researchers have developed a novel method for integrating quantum dot laser within silicon for scalable photonics

2025-07-18
(Press-News.org)

Lasers that are fabricated directly onto silicon photonic chips offer several advantages over external laser sources, such as greater scalability. Furthermore, photonic chips with these “monolithically” integrated lasers can be commercially viable if they can be manufactured in standard semiconductor foundries.

III-V semiconductor lasers can be monolithically integrated with photonic chips by directly growing a crystalline layer of laser material, such as indium arsenide, on silicon substrate. However, photonic chips with such integrated laser source are challenging to manufacture due to mismatch between structures or properties of III-V semiconductor material and silicon. ‘Coupling loss’ or the loss of optical power during transfer from laser source to silicon waveguides in the photonic chip is yet another concern when manufacturing photonic chips with monolithically integrated lasers.

In a study that was recently published in the IEEE Journal of Lightwave Technology, Dr. Rosalyn Koscica from the University of California, United States, and her team successfully integrated indium arsenide quantum dot (QD) lasers monolithically on silicon photonics chiplets. According to Dr. Koscica, “Photonic integrated circuit (PIC) applications call for on-chip light sources with a small device footprint to permit denser component integration.”

To achieve this monolithic integration, the authors combined three key concepts: the pocket laser strategy for monolithic integration, a two-step material growth scheme that includes both metalorganic chemical vapor deposition and MBE for a smaller initial gap size, and a polymer gap-fill approach to minimize optical beam divergence in the gap, to develop monolithically integrated QD lasers on silicon photonics chiplets.

On testing, the chiplets with monolithically integrated lasers demonstrated sufficiently low coupling loss. As a result, the QD lasers operate efficiently on a single O-band wavelength within chiplets. The O-band wavelength is desirable as it allows for transmission of signals within photonic devices with low dispersion. Lasing in the single frequency is achieved using ring resonators made from silicon or distributed Bragg reflectors made from silicon nitride.

“Our integrated QD lasers demonstrated a high temperature lasing up to 105 °C and a life span of 6.2 years while operating at a temperature of 35 °C,” says Dr. Koscica.

The laser integration technique has the potential to be adopted widely due to two reasons. Firstly, the photonics chips can be manufactured in standard semiconductor foundries. Secondly, the QD laser integration technique can work for a range of photonic integrated chip design without needing extensive or complex modifications.

The proposed integration technique can be applied to a variety of photonic integrated circuit designs by modifying the silicon photonics components, paving the way for a scalable, cost-effective monolithic integration of on-chip light sources for practical applications.

 

***

 

Reference                                     

 

DOI:  10.1109/JLT.2025.3555555

 

Authors: Rosalyn Koscica et al.

 

Affiliations:

Materials Department and Institute for Energy Efficiency, University of California Santa Barbara, USA AIM Photonics, RF SUNY Polytechnic Institute, Albany, USA Analog Photonics, Boston, USA Aeluma Inc., Goleta, USA END



ELSE PRESS RELEASES FROM THIS DATE:

Researchers discover that sound stress alone can prolong and intensify pain

2025-07-18
Pain is an important physiological response in living organisms. While physical pain is an outcome of tissue damage, pain can manifest as diverse unpleasant sensory and emotional experiences. Many studies report that emotional or psychological stress enhances pain responses. Furthermore, mice housed with other mice experiencing inflammatory pain exhibit a ‘bystander effect’ with heightened pain sensitivity, or ‘hyperalgesia.’ However, the effects that underpin social pain transmission remain elusive.  Rodents emit ultrasonic vocalizations in the form of high-pitched squeaks in response to various stimuli, including pain, in ...

Less pain, more gain: A new recipe for safer, stronger mRNA vaccines

2025-07-18
As millions of people know firsthand, the most common side effect of mRNA vaccines like the COVID-19 shot is inflammation: soreness, redness and a day or two of malaise. But what if mRNA vaccines could be redesigned to sidestep that response altogether? In a new paper in Nature Biomedical Engineering, researchers at the University of Pennsylvania show that tweaking the structure of the ionizable lipid, a key component of the lipid nanoparticles (LNPs) that deliver mRNA, not only reduces inflammation but also boosts vaccine effectiveness for preventing or treating a range of diseases, from COVID-19 to cancer. The ...

Surprising finding could pave way for universal cancer vaccine

2025-07-18
An experimental mRNA vaccine boosted the tumor-fighting effects of immunotherapy in a mouse-model study, bringing researchers one step closer to their goal of developing a universal vaccine to “wake up” the immune system against cancer. Published today in Nature Biomedical Engineering, the University of Florida study showed that like a one-two punch, pairing the test vaccine with common anticancer drugs called immune checkpoint inhibitors triggered a strong antitumor response. A surprising element, researchers said, was that they achieved the promising results not by attacking a specific target protein expressed in the tumor, but by simply revving ...

Gene essential for vitamin D absorption could help unlock treatments for cancer and autoimmune diseases

2025-07-18
Vitamin D is not only an essential nutrient, but also the precursor of the hormone calcitriol, indispensable for health: it regulates the uptake of phosphate and calcium necessary for bones by the intestines, as well as cell growth and the proper function of muscles, nerve cells, and the immune system. Now, researchers have shown for the first time in Frontiers in Endocrinology that a particular gene, called SDR42E1, is crucial for taking up vitamin D from the gut and further metabolizing it – a discovery with many possible applications in precision medicine, including ...

Don’t feed the animals: Researchers warn of risks tied to wildlife interactions

2025-07-18
A study led by a scientist at the University of California San Diego offers new warnings on the dangers of human interactions with wildlife. Assistant Professor Shermin de Silva of the School of Biological Sciences studies endangered Asian elephants and has reported on their shrinking habitats, a downturn that has resulted in territorial conflicts between people and elephants. Along with her study coauthors, de Silva now provides fresh evidence in the journal Ecological Solutions and Evidence on ...

New layered compound promotes two-dimensional magnetism researches and room-temperature magnetic applications

2025-07-18
A major international collaboration between researchers in China and the U.S. has successfully synthesized a novel two-dimensional magnetic material (indium-based chromium telluride, CIT) using chemical vapor transport. A compound that exhibits robust ferromagnetism and magnetocaloric effect at room temperature with intriguing phase transition behavior and complex magnetic interaction. This discovery paves the way for novel applications in high-performance spintronics, magnetic refrigeration, and advanced electronic devices. The realm of 2D materials has intrigued researchers due to their distinctive physical properties and promising technological ...

From passive to intelligent: Bioengineered organs meet electronics

2025-07-18
Bioengineered organs are no longer just structural substitutes. A new review published in Trends in Biotechnology introduces a groundbreaking concept: biohybrid-engineered tissue (BHET) platforms—living constructs integrated with electronics that can monitor, modulate, and even autonomously control their own functions. The review, authored by Dr. Uijung Yong (Future IT Innovation Laboratory, Pohang University of Science and Technology (POSTECH)), Jihwan Kim (Department of Mechanical Engineering, POSTECH), and Prof. Jinah Jang (Department of Mechanical Engineering, Convergence IT Engineering, and School of Interdisciplinary Bioscience and Bioengineering, POSTECH), ...

Cassava witches’ broom disease takes flight in South America

2025-07-18
Alliance researchers and partners, including Embrapa, Brazil’s largest agricultural research organization, launched a rapid response plan to slow the spread and mitigate potentially devastating consequences for food security and livelihoods. In 2023, cassava farmers in remote French Guiana watched in shock as their crops withered. They pulled dilapidated stems from the ground. Instead of unearthing massive root bunches, which are cornerstones of diets across South America, they found nothing larger ...

Recycled tyre tech boosts railway resilience and cuts waste

2025-07-18
New research has shown that a world-first system of rubber shock absorbers made from recycled tyres can significantly protect railway tracks from damage, addressing the dual challenges of high maintenance costs and national tyre waste. The technology was validated over a two-year period by a collaborative team from the University of Technology Sydney (UTS), Sydney Trains, Transport for NSW, and industry partners EcoFlex and Bridgestone, following extensive monitoring at a live Sydney Trains freight line in Chullora. Researchers installed track ...

From kelp to whales: marine heatwaves are reshaping ocean life

2025-07-17
New research from the University of Victoria (UVic) highlights how marine heatwaves can dramatically impact marine ecosystems and offers a stark preview of how future ocean warming will reshape ocean life. From 2014 to 2016, the Pacific coast of North America experienced the longest marine heatwave ever recorded, with temperatures reaching two to six degrees above historical averages over a prolonged period. Researchers from UVic’s Baum Lab have compiled a comprehensive overview of the heatwave’s ecological impacts, reviewing the findings from 331 primary studies and governmental reports. “The marine heatwave resulted in unprecedented ecological disturbance across thousands ...

LAST 30 PRESS RELEASES:

Coexistence of APC and KRAS mutations in familial adenomatous polyposis and endometrial cancer: A mini-review with case-based perspective

First global-to-local study reveals stark health inequalities from COVID-19 in 2020–2021

rcssci: Simplifying complex data relationships with enhanced visual clarity

Why some ecosystems collapse suddenly—and others don’t

One-third of U.S. public schools screen students for mental health issues

GLP-1 RA use and survival among older adults with cancer and type 2 diabetes

Trends in physician exit from fee-for-service Medicare

Systematic investigation of tumor microenvironment and antitumor immunity with IOBR

Common feature between forest fires and neural networks reveals the universal framework underneath

New R package revolutionizes gene set enrichment analysis visualization for biomedical research

Benign uterine tumor resembling cancer highlights diagnostic challenges

Diagnostic performance of ATR-FTIR spectroscopy in discriminating normal breast tissue and breast tumors

Recent advancements in the treatment of age-related macular degeneration

Comprehensive multi-omics integration reveals B cell-derived ELL2 as a novel diagnostic and prognostic biomarker in sepsis

How tumor microbes shape cancer: New insights into microbial diversity in the tumor microenvironment

AI-powered biomarker system redefines thyroid cancer progression and subtypes

Digestive cancers in China: A two-decade burden with uneven gains in life expectancy

ANXA2+ migratory hepatocytes identified as key players in human liver regeneration

Researchers demonstrate a new material to reduce power consumption of electronics

New chemical tool may improve development of key drug components

IEEE study achieves efficient integration of quantum dot lasers on silicon chiplets

Researchers discover that sound stress alone can prolong and intensify pain

Less pain, more gain: A new recipe for safer, stronger mRNA vaccines

Surprising finding could pave way for universal cancer vaccine

Gene essential for vitamin D absorption could help unlock treatments for cancer and autoimmune diseases

Don’t feed the animals: Researchers warn of risks tied to wildlife interactions

New layered compound promotes two-dimensional magnetism researches and room-temperature magnetic applications

From passive to intelligent: Bioengineered organs meet electronics

Cassava witches’ broom disease takes flight in South America

Recycled tyre tech boosts railway resilience and cuts waste

[Press-News.org] IEEE study achieves efficient integration of quantum dot lasers on silicon chiplets
Researchers have developed a novel method for integrating quantum dot laser within silicon for scalable photonics