2D Semiconductors For Optoelectronics

A new family of 2D semiconductors could pave the way for high-performance and energy-efficient electronics. The findings may lead to the fabrication of semiconductor devices applicable in mainstream electronics and optoelectronics – and even potentially replace silicon-based device technology altogether. 2D semiconductors are materials with a thickness of a few atoms. Due to their nanoscale [..]

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COVID Test – Microscopy, AI Improve Accuracy

Researchers have paired microscopy with artificial intelligence to develop a fast, accurate, and cost-effective COVID test. While many methods currently exist to test for SARS-CoV-2, none use a label-free optical approach. So, the research team turned to a technique typically reserved for visualizing cells: spatial light image microscopy (SLIM), which facilitates chemical-free (or label-free) imaging. [..]

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DNA Computing With Microfluidic Chips

DNA computing uses the individual units of DNA’s two strands (which are selectively bound to each other in a complementary manner) to do complicated mathematical calculations. However, most DNA computing processes are still manual – one needs to add reactants step-by-step to the reaction. Finally, scientists have developed a programmable DNA-based microfluidic device that a [..]

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One-Photon Confocal Fluorescence Imaging

Due to light dispersion and absorption, imaging deep into tissues is challenging. The wavelength windows for high-resolution deep mouse brain imaging are around 1300 nm and 1700 nm. However, due to the low detection efficiency of currently available detectors, one-photon fluorescence imaging in the wavelength region has proved extremely difficult. Researchers have created one-photon confocal [..]

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Gravitational Lensing – Viewing Distant Black Holes

Astronomers have recorded an unparalleled look at X-rays from a black hole system in the early cosmos using gravitational lensing, a natural lens in space. For the first time, NASA’s Chandra X-ray Observatory employed this magnifying glass to sharpen X-ray images. It acquired details about black holes that would otherwise be too far away to [..]

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Graphene Quantum Dots For Optoelectronic Applications

Due to their lower toxicity than cadmium-based semiconductor quantum dots, graphene quantum dots (GQDs) are attractive luminous materials for numerous light-emitting, biological, and energy applications. The luminous properties of GQDs drive their practical applications sand uses. As a result, controlling and tailoring the emission properties of these materials to suit the specified optoelectronic applications is [..]

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MRI Compatible Virtual Reality System

Magnetic Resonance Imaging (MRI) often makes patients experience anxiety and sometimes distress before and during scanning. Researchers have developed an MRI compatible virtual reality (VR) system to create a radically different experience. The strong sense of immersion with VR could create sensory experiences designed to avoid the perception of being enclosed and provide new modes [..]

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High-Power Laser – Controlling Position, Pointing Angle

Scientists have developed an innovative optical system to precisely measure and control high-power laser beams’ position and pointing angle with unprecedented accuracy – without interrupting or disturbing the beams. Even in the most regulated lab setting, laser beams wander around on a microscopic scale due to vibrations and variability. The difference between excellent science and [..]

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Diagnostic Imaging Automation With Robotic Scanner

Researchers have created robotic diagnostic imaging equipment that can detect and scan a patient’s eyes for indicators of various eye illnesses automatically. The new device, which combines an imaging scanner and a robotic arm, can track and image a patient’s eyes in under a minute and provide images that are as clear as those produced [..]

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Spin Dynamics - X-Ray Photon Correlation Spectroscopy

Lower temperatures cause reduced mobility of tiny components in almost all materials. When there is a lack of heat energy, atoms are less likely to change their location or magnetic moments’ direction: they freeze. For the first time, a group of scientists has seen the opposite behavior in a nickel oxide material related to high-temperature [..]

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Holographic Display With Vision Correction

By modifying the complicated wavefront of coherent light with a spatial light modulator, holographic display may rectify many refractive defects, produce high-resolution images, and enable focus cues. It could be advantageous to have a hologram rendering used in any situation using rapid and accurate calculations. Researchers developed a vision-correcting holographic display with hologram acquisition based [..]

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Plasmon Polaritons Dragged By Electron Flow

When immersed in an electrical current flowing through a sheet of graphene, quasiparticles comprised of photon and electron waves — plasmon polaritons — have the potential to change speeds, according to a new study. However, while going against the flow of electrons, the polaritons appear to shift gears more easily in one direction — to [..]

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Multiform Beams - Wavefront-controlled Metasurfaces

Ultrathin metasurfaces generate multiform beams (electromagnetic, multi-direction, multi-polarization, multi-frequency, and multi-beam) with promising applications in numerous optical traps, modern communication systems, and complex environments identification. However, their capacity to generate required multiform beams concurrently limits their application. Researchers developed a multifunctional surface with a polarization selection structure and integrated electric and magnetic systems to overcome [..]

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Uveal Melanoma – New Promising Treatment

The fatality rate for uveal melanoma, a rare and dangerous disease of the eye, has remained unchanged for the past 40 years. New treatments to preserve eyesight and avoid mortality are urgently needed because half of the melanomas spread to other body organs, resulting in death in less than a year. Researchers have discovered a [..]

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III-V Photodetectors For Silicon Photonics

Photonics integration is gaining pace in semiconductors, particularly in heterogeneous multi-die packages, as chipmakers look for innovative solutions to overcome power constraints and deal with growing data volumes. Since the end of Dennard scaling, which occurred at the 90nm node, power has become increasingly challenging. There are more transistors per mm2, and the wires are [..]

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Transfer Printing – Integrating Chip-Based Optical Systems

Scientists have developed the first room-temperature, electrically driven, topological laser, which could be useful in telecom wavelength applications. The novel device is made up of a 10 by 10 grid of 30 micron-wide rings. Small oblong rings around 5 microns wide connect these rings to one another. All these rings consist of a sandwich of [..]

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IR Detector - Dual-Band, CMOS-Compatible, Bias-Tunable

Infrared imaging applications are growing from food quality control and remote sensing to night vision devices and LiDAR. IR cameras convert infrared light to electrons and project the resultant image on a display. However, such cameras are bulky, disrupt normal vision, and require low temperature. Alternatively, a nonlinear optical process – nonlinear sum-frequency generation (SFG) [..]

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