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RESEARCH & TECHNOLOGY NEWS
Silicon Photonics Platform Provides On-Chip Neural Network Training WASHINGTON, D.C., Dec. 8, 2022 — Researchers from George Washington University (GWU) have introduced a strategy for training deep neural networks the benefits of using photonics to execute artificial intelligence (AI) applications. The team’s CMOS-compatible silicon photonics architecture enabled parallel, ultrafast on-chip training of neural networks with low energy consumption. According to professor Volker Sorger, the hardware that keys the advancement will accelerate the speed of training of machine learning
Atypical Accelerator Yields Free Electron Lasing in the Ultraviolet DRESDEN, Germany, Dec. 7, 2022 — The extremely intense light pulses generated by free-electron lasers (FELs) are versatile tools in research. In the x-ray range, they can be used to analyze the details of atomic structures of a wide variety of materials, and to follow fundamental...
Needle-Shaped Beam Bolsters Range of Depth to Photoacoustic Method PASADENA, Calif., Dec. 7, 2022 — Researchers at Caltech have introduced an approach to photoacoustic microscopy (PAM) that uses a needle-shaped laser beam to extend the depth of field associated with the microscopy method. The technique, named NB-PAM (needle-shaped beam...
Electronics Manufacturing Extends Spectrum of Integrated Photonics SANTA BARBARA, Calif., Dec. 6, 2022 — To realize its full potential, photonics technology must become smaller, cheaper, and easier to produce. Though researchers have made progress on these fronts, challenges remain in getting circuits to work with shorter wavelengths of light. To this...
Microscope Enables 3D High-Speed Image Capture of Living Cells TROMSØ, Norway, Dec. 6, 2022 — A limitation to conventional microscopy imaging, in which a sample is usually squeezed onto a glass slide, is that the behavior of the cells may differ from their natural environment. Further, the the images obtained via this approach are...
Quantum Light Transmitted Through Phase-Separated Anderson Localization Fiber CASTELLDEFELS, Spain, Dec. 5, 2022 — Following its development by a team at Corning in 1970, low-loss optical fiber became the best means to efficiently transport information from one place to another over long distances without loss of information. However, with the exponential...
Chip-Scale Laser Isolator Signals Forthcoming Advances in Compute STANFORD, Calif., Dec. 2, 2022 — Lasers are transformational devices, but one technical challenge prevents them from being even more so. The light they emit can reflect back into the laser itself and destabilize or even disable it. At real-world scales, this challenge is solved by...
Sound Waves Enable Individual Photon Control at High Speed MÜNSTER, Germany, Dec. 1, 2022 — Light and sound are foundational to modern communication technology. Glass fibers — with laser light— form the bedrock of the internet. Nanoscale sound waves on chips serve to process signals at gigahertz frequencies for wireless...
Programmable Device Enables Optical Control at Unprecedented Speeds CAMBRIDGE, Mass., Nov. 30, 2022 — An international team led by MIT researchers has developed a spatial light modulator (SLM) that promises greater control of light at orders of magnitude more quickly than commercial devices. The team also developed a fabrication process to ensure...
Diode Demonstration Establishes Efficient Route to Sterile Settings NAGOYA, Japan, Nov. 29, 2022 — Since their introduction in the 1960s, laser diodes have been developed and commercialized for a number of applications with wavelengths ranging from infrared to blue-violet. Examples of this technology include optical communications devices with...
Low-Cost Solar Cell Amplifies Performance Potential of Perovskite TORONTO, Nov. 28, 2022 — An international research team has produced an all-perovskite tandem solar cell with exceptionally high open-circuit voltage and efficiency. The prototype device demonstrates the potential of perovskite, an emerging photovoltaic technology, to...
Shorter Wavelength Expands Fluorophore’s Role in Monitoring Cell Dynamics OSAKA, Japan, Nov. 28, 2022 — A genetically modified fluorescent protein has exhibited the shortest fluorescence emission wavelength to date, researchers at Osaka University reported. The fluorophore, named Sumire, emits 414-nm violet fluorescence from a hydrated chromophore....
International Space Station's Newest Transceiver Targets Space Debris DRESDEN, Germany, Nov. 23, 2022 — Use of a modular system, enabling individual components to be replaced and thereby extending service life — can make satellite systems more sustainable. To ensure a problem-free interface between components, a team from the Fraunhofer...
Multimodal Microscopy Provides Window into Viruses’ Beginnings DURHAM, N.C., Nov. 23, 2022 — To better understand how viruses breach the protective layers of cells that line the airways and gut, Duke University researchers used multimodal microscopy to capture real-time video footage of viruses as they approach their cellular targets. Using...
Light Burst Opens Path to On-Board 3D Processing in Semiconductor Chips MARSEILLE, France, Nov. 22, 2022 — Because semiconductors serve as the backbone of modern technologies including cellphones, cars, robots, and other devices, the continuous need for miniaturized and powerful chips is placing increased pressure on semiconductor manufacturing...
Researchers Unlock Light-Matter Interactions on Subnanometer Scales WEST LAFAYETTE, Ind., Nov. 22, 2022 — Researchers at Purdue University have discovered waves with picometer-scale spatial variations of electromagnetic fields that can propagate in semiconductors like silicon. The findings demonstrate that natural media host a variety of light-matter...
Liquid Crystal Metasurface-Based Spectropolarimeter Cuts Complexity BEIJING, Nov. 21, 2022 — Researchers led by professor Yuanmu Yang from the State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University have developed a near-infrared spectropolarimeter based on an...
Optical Delay Scanning Gets Dual Boost ZURICH, Nov. 18, 2022 — Various applications of pulsed laser sources rely on the ability to produce a series of pulse pairs with a stepwise increasing delay between them. Implementing such optical delay scanning with high precision is demanding, particularly for long...
Embedded AI Localizes Data Processing for Greater Speed and Security DRESDEN, Germany, Nov. 17, 2022 — The Fraunhofer Institute for Photonic Microsystems (IPMS) aims to support more secure, faster data processing by integrating machine learning algorithms into digital devices. Although AI-enabled devices are firmly integrated with daily life, the...
Spectral Control of Network Lasers Opens Opportunity for On-Chip Photonics LONDON, Nov. 17, 2022 — Efficient spectral control of network lasers is possible and could lead to fast-switching, multifunctional light sources for on-chip photonic applications. Using experiments and mathematical models, researchers at Imperial College London...
Quantum-Assisted Coating Cools Indoor Spaces Without Energy SOUTH BEND, Ind., Nov. 15, 2022 — To cool buildings more efficiently, researchers at the University of Notre Dame and Kyung Hee University in South Korea developed a high-performance, transparent radiative cooler (TRC) using quantum annealing (QA) combined with artificial...
Light-Activated Molecular Motors Achieve Fluorescence GRONINGEN, Netherlands, Nov. 14, 2022 — In their study of rotary molecular motors, researchers in the laboratory of Ben Feringa at the University of Groningen have combined two light-mediated functions — motion and fluorescence — within a single molecule. The advancement is...
Pump Laser Modules Show Promise for Ophthalmologic Treatments BERLIN, Nov. 11, 2022 — Researchers at the Berlin-based Ferdinand-Braun-Institut (FBH) developed a pump laser module for ophthalmologic treatments. The module offers a cost-effective pump source for laser systems that are used to treat retinal detachments. The miniaturized...
Model Reveals Microspheres’ Effect on Interferometric Resolution KASSEL, Germany, Nov. 10, 2022 — Though microspheres — microscale spherical particles that can be manufactured from natural and synthetic materials — are known to improve lateral resolution and enhance magnification in microscopic imaging, a generally accepted...
Miniaturized Spectrometer Proves a Fit for Compact Electronics ST. GALLEN, Switzerland, Nov. 9, 2022 — Scientists in Europe have collaborated to develop an ultracompact spectrometer design that offers large bandwidth, moderate spectral resolution, and a spectral sensitivity in the infrared (IR) region. According to the team, its design for a...
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