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Terahertz Generation Method Targets Ultrafast Electronics
SHANGHAI, Oct. 3, 2023 — Terahertz (THz) waves can be used to probe the magnetic properties of new materials. Efficient THz wave generation could advance applications in energy harvesting, ultrafast electronics, and THz spectroscopy. Bright, coherent THz light sources can be achieved via high-frequency, high-density charge currents. It is possible to produce strong current density that is several orders of magnitude higher than what is typically found in electronic devices, by exciting nanometer-scale, metallic
Wearable Sensor Could Detect Postpartum Blood Loss
WASHINGTON, D.C., Oct. 3, 2023 — Postpartum hemorrhage, the leading and most preventable cause of maternal mortality, can be hard to detect, because physiological compensation mechanisms can mask excessive bleeding. In the early stages of hemorrhage, the sympathetic nervous system...
Photonic-Electronic NIC Serves Live Machine Learning Requests
CAMBRIDGE, Mass., Oct. 2, 2023 — A burgeoning growth in machine learning applications is occurring alongside shrinking computing resources. As computers approach the limits of their power according to Moore’s law, the need to design platforms that support the computational...
Single-Layer OLED Design Offers Efficiency Without Complexity
MAINZ, Germany, Sept. 28, 2023 — With the development of a single-layer, blue-emitting OLED, researchers at the Max Planck Institute (MPI) for Polymer Research demonstrated that one-layer OLEDs can achieve a performance level comparable to commercial OLEDs with multiple layers,...
More Efficient Microcombs on the Road to Commercialization
GOTHENBURG, Sweden, Sept. 25, 2023 — Researchers at Chalmers University have developed a method to make microcombs 10 times more efficient, opening pathways to discovery in space and health care, and paving the way for high-performance lasers in a range of technologies. The team has...
Single-Cell Analysis Optofluidics Tool Delivers on Demand
QINGDAO, China, Sept. 20, 2023 — An on-demand optical system for exporting target droplets from a static droplet array (SDA) provides a simple way to export specific cells or analytes for analysis without compromising efficiency or accuracy. Researchers at the Qingdao Institute of...
Spectrometer Aims to Further Refine Lithography
ENSCHEDE, Netherlands, Sept. 19, 2023 — To improve the quality of microchips and make the chipmaking process more efficient, researchers at the University of Twente’s MESA+ Institute of Nanotechnology developed an extreme ultraviolet (EUV) broadband imaging spectrometer. The new...
Photoacoustic Microscopy Method Delivers Higher Sensitivity
HONG KONG, Sept. 15, 2023 — A multispectral, super-low-dose photoacoustic microscopy (SLD-PAM) system developed by City University of Hong Kong (CUHK) achieves significantly higher sensitivity than traditional optical resolution photoacoustic imaging. By providing an...
Micro-LEDs Heighten Color and Definition for Immersive Displays
NAGOYA, Japan, Sept. 14, 2023 — High resolution and high definition are key to delivering a realistic visual experience in augmented reality (AR) and other immersive technologies. Inexpensive micro-LEDs that enable full-color imaging at high resolution could help immersive...
Simulated Technique Cuts Losses in Optical Resonators
ESPOO, Finland, Sept. 13, 2023 — Optical resonators are used to control light in a range of photonic applications, from pocket-size laser pointers to quantum computers. When a resonator experiences optical loss, its ability to trap and concentrate photons deteriorates, reducing its...
Air-Leak Detection System Visualizes Building Drafts
OAK RIDGE, Tenn., Sept. 12, 2023 — Researchers at the Department of Energy’s Oak Ridge National Laboratory (ORNL) have created a detection system that allows home energy auditors to see air leaking from a building in real time with the help of a camera. This could provide more...
LITE Spectroscopy Resists Light Sources with Phase Demodulation
HARBIN, China, Sept. 12, 2023 — A team at Harbin Institute of Technology led by professor Yufei Ma introduced an approach to phase demodulation of heterodyne light-induced thermoelastic spectroscopy (H-LITES) that uses a Fabry-Pérot interferometer (FPI). Compared with...
Complex Frequency Waves Counter Optical Losses in Superimaging
HONG KONG, Sept. 11, 2023 — Superlenses made of plasmonic materials and metamaterials can image features at the subdiffraction scale. However, intrinsic losses restrict the image resolution of superlenses, hindering their widespread use. To compensate for optical loss in...
Underwater Laser Cutting Method Optimizes Efficiency
DRESDEN, Germany, Sept. 11, 2023 — The need for modern technologies to dismantle existing underwater infrastructure is growing due to increasing demand for renewable energy sources. For example, to bring a wind power plant in the sea up to higher powers, the existing old steel...
Tomography Technique Images Thick Bio Samples at High Resolution
CAMBRIDGE, Mass., Sept. 8, 2023 — The ability to image complex biological tissues is essential for many biological studies and clinical diagnostic applications. However, capturing detailed 3D images of thick biological samples is difficult, due to multiple light-scattering in the...
Computer Vision Enhanced Sensors Aid Mobility-Challenged Patients
POHANG, South Korea, Sept. 5, 2023 — Researchers from Pohang University of Science and Technology (POSTECH) have developed optical sensor technology to aid patients with limited mobility during their rehabilitation. The sensor integrates computer vision technology to help track muscle...
Industrial Photocatalyst Harnesses the Visible Spectrum
JOHANNESBURG, Sept. 4, 2023 — Photocatalysts show the potential to be used in energy generation and environmental detoxification applications. This is an intriguing quality, since reducing energy use in bulk industrial processes can create a trade-off between efficiency and...
Skin-Like Microfiber Grating Gauges Cardiovascular Wellness
NANJING, China, Aug. 31, 2023 — According to the World Health Organization, 17.9 million people die annually due to cardiovascular diseases. Soft wearable devices are well suited for monitoring physiological signals from electrocardiogram, phonocardiogram, and pulse wave....
Plasmonic Metafibers Simplify Electro-Optic Modulator Integration
ZHEJIANG, China, Aug. 30, 2023 — Electro-optic modulators (EOMs) are critical elements in the optical communication networks that control the amplitude, phase, and polarization of a light via external electric signals. Aiming to realize ultracompact and high-performance EOMs, most...
Quantum Light Source Emits Circularly Polarized Single Photons
LOS ALAMOS, N.M., Aug. 29, 2023 — An approach to quantum light emitters developed at Los Alamos National Laboratory stacks two different atomically thin materials to realize a source that generates a stream of circularly polarized single photons that can be used for a variety of...
Novel Integration Helps Solve Imaging Bottleneck
LEUVEN, Belgium, Aug. 28, 2023 — Engineers at imec have integrated a pinned photodiode (PPD) structure in thin-film image sensors. According to the researchers, the addition of a pinned-photogate and a transfer gate into the thin-film image sensor architecture exploits the superior...
High-speed Raman Method Detects Micro- and Nanoplastics
CHANGCHUN, China, Aug. 25, 2023 — Raman spectroscopy is a useful tool for identifying microplastics — plastic particles smaller than 5 mm — although conventional point confocal Raman methods are limited to single-point detection, limiting the detection speed. A line-scan...
Tomography Techniques Recover Scattered Light to Speed 3D Imaging
WASHINGTON, D.C., Aug. 24, 2023 — Although 3D imaging techniques are useful for studying thick biological samples, the challenge to achieve both high-speed acquisition and high resolution of 3D images persists. Intensity diffraction tomography (IDT), a label-free phase tomography...
GaN-Based LEDs Achieve High-Frequency Visible Light Communications
SHANGHAI, Aug. 23, 2023 — As the large-scale, commercial use of 5G networks has grown, so has the need for broader bandwidth to accommodate high-speed communications. To meet the resource needs of the post-5G and 6G eras, researchers at Fudan University are exploring visible...
Optical Processor Captures Scenes in Spatially Incoherent Light
LOS ANGELES, Aug. 22, 2023 — A research team led by professor Aydogan Ozcan at the University of California, Los Angeles (UCLA) developed a deep-learning-based approach to designing spatially incoherent, diffractive optical processors. The method provides a way to build...

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