Current Optical Devices News and Events

Current Optical Devices News and Events, Optical Devices News Articles.
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New "metalens" shifts focus without tilting or moving
An MIT-fabricated metalens shifts focus without tilting, shifting, or otherwise moving. The design may enable miniature zoom lenses for drones, cellphones, or night-vision goggles. (2021-02-22)

Silver and gold nanowires open the way to better electrochromic devices
A Canadian team from the Institut national de la recherche scientifique (INRS) developed a new approach for foldable and solid devices. (2021-02-22)

Polymer film protects from electromagnetic radiation, signal interference
In a breakthrough report published in Advanced Materials engineers at the University of California, Riverside describe a flexible film using a quasi-one-dimensional nanomaterial filler that combines excellent electromagnetic shielding with ease of manufacture. (2021-02-22)

New sensor paves way to low-cost sensitive methane measurements
Researchers have developed a new sensor that could allow practical and low-cost detection of low concentrations of methane gas. Measuring methane emissions and leaks is important to a variety of industries because the gas contributes to global warming and air pollution. (2021-02-22)

Seeing stable topology using instabilities
The researchers explore how topological phases of light in nonlinear optical media undergo the process of modulational instability. (2021-02-19)

Irregular sleep schedules connected to bad moods and depression, study shows
Irregular sleep schedules can affect mood and risk of developing symptoms of depression according to a study of first-year medical residents that used Fitbits and smartphones. (2021-02-18)

Engineers place molecule-scale devices in precise orientation
A technique for controlling the orientation of manufactured DNA shapes now removes one of the last barriers for the combination of molecular devices with conventional semiconductor chips. (2021-02-18)

Spin hall effect of light with near 100% efficiency
POSTECH-KAIST joint research team develops perfect SHEL using anisotropic metasurfaces. (2021-02-18)

You snooze, you lose - with some sleep trackers
Wearable sleep tracking devices - from Fitbit to Apple Watch to never-heard-of brands stashed away in the electronics clearance bin - have infiltrated the market at a rapid pace in recent years. And like any consumer products, not all sleep trackers are created equal, according to West Virginia University neuroscientists. (2021-02-17)

Electrons living on the edge
University of Tsukuba researchers calculated the electronic structure of topological insulators excited by laser beams and found that massless states can be generated. This work may lead to a major advance in computer technology with circuits that generate less heat. (2021-02-17)

Ultrabright dots see beyond skin deep
Tiny light-emitting probes give researchers a better option for noninvasive imaging of living tissue. (2021-02-16)

A performance leap for Graphene modulators in next generation datacom and telecom
An international team of researchers reports in Nature Communications the development of a graphene-based optical modulator that proves outstanding performances in modulation efficiency, stability and high speed. (2021-02-16)

Highway tunnel for ions
We live in modern times, that is full of electronics. Smartphones, laptops, tablets, and many other devices need electrical energy to operate. Portable devices made our lives easier, so novel solutions in clean energy and its storage are desirable. Lithium-ion (Li-ion) batteries are the most common solutions that dominate the global market and are a huge problem due to their insufficient recovery. (2021-02-16)

A sharper look at the interior of semiconductors
A research team at Friedrich Schiller University Jena (Germany) developed a high-resolution imaging method based on extreme short-wave UV light. It can be used to examine internal structures in semiconductors non-destructively, and with nanometre precision as the team reported in the current issue of the journal 'Optica'. (2021-02-16)

NREL heats up thermal energy storage with new solution meant to ease grid stress
Scientists from the National Renewable Energy Laboratory (NREL) have developed a simple way to better evaluate the potential of novel materials to store or release heat on demand in your home, office, or other building in a way that more efficiently manages the building's energy use. (2021-02-16)

New physics rules tested on quantum computer
Simulation of non-Hermitian quantum mechanics using a quantum computer goes beyond centuries old conventions (2021-02-15)

Dual character of excitons in the ultrafast regime: atomic-like or solid-like?
Researchers at Politecnico di Milano in collaboration with the Institute of Photonics and Nanotechnologies IFN-CNR and a theory group from the Tsukuba University (Japan) and the Max Plank Institute for the Structure and Dynamics of matter (Hamburg, Germany), have discovered that an exciton can simultaneously adopt two radically different characters when it isstimulated by light. (2021-02-15)

International study reveals exceptional property of next generation optical fibers
Researchers from the Optoelectronics Research Centre (ORC) and Universite Laval, Canada, have successfully measured for the first time back-reflection in cutting-edge hollow-core fibres that is around 10,000 times lower than conventional optical fibres. (2021-02-15)

Move over heavy goggles, here come the ultra-high refractive index lenses
POSTECH professor Junsuk Rho's research team develops a transparent silicon without visible light loss by controlling the silicon atomic structure. (2021-02-14)

Highly efficient metasurface poised to improve communication and biosensing
Researchers have created a new plasmonic metasurface that achieves record high light efficiency over the entire centimeter-scale metasurface. The advance makes the new nanostructured thin film practical for use in a variety of applications from light-based communication to fluorescence-based biosensing. (2021-02-11)

Capturing free-space optical light for high-speed wifi
Visible and infrared light can carry more data than radio waves, but has always been confined to a hard-wired, fiber-optic cable. Working with Facebook's Connectivity Lab, a Duke research team has now made a major advance toward the dream of ditching the fiber in fiber optics. (2021-02-11)

Vibrating 2D materials
Two-dimensional materials hold out hope for many technical applications. An international research team now has determined for the first time how strongly 2D materials vibrate when electronically excited with light. (2021-02-11)

Wafer-scale production of graphene-based photonic devices
Graphene Flagship researchers have devised a wafer-scale fabrication method that paves the way to the next generation of telecom and datacom devices. (2021-02-11)

A new quantum switch for electronics
A Russian physicist and his international colleagues studied a quantum point contact (QCP) between two conductors with external oscillating fields applied to the contact. They found that, for some types of contacts, an increase in the oscillation frequency above a critical value reduced the current to zero - a promising mechanism that can help create nanoelectronics components. (2021-02-11)

Monitoring the body's fat burning by breath
Your breath holds the key to monitoring fat burning, and now a research group from Tohoku University has created a compact and low-cost device that can measure how our body metabolizes fat. (2021-02-10)

Object transparency reduces human perception of three-dimensional shapes
Toyohashi University of Technology discovered that when people judge the thickness of an object, objects with glass-like transparent optical properties are perceived to be flatter than they actually are. This discover may be useful for everyday applications, such as devices to assist with walking in people with low-vision or autonomous driving. (2021-02-10)

A scalable method for the large-area integration of 2D materials
Graphene Flagship researchers report a new method to integrate graphene and 2D materials into semiconductor manufacturing lines, a milestone for the recently launched 2D-EPL project. (2021-02-10)

Tests reveal cybersecurity vulnerabilities of common seismological equipment
Seismic monitoring devices linked to the internet are vulnerable to cyberattacks that could disrupt data collection and processing, say researchers who have probed the devices for weak points. (2021-02-10)

Scientists create armour for fragile quantum technology
An ANU-led international team has invented the equivalent of 'body armour' for extremely fragile quantum systems, which will make them robust enough to be used as the basis for a new generation of low-energy electronics. (2021-02-08)

Efficiency limits of next-generation hybrid photovoltaic-thermal solar technology
Spectral-splitting hybrid photovoltaic-thermal (SSPVT) technology has emerged as a promising route toward high-performance solar harvesting. In this research, scientists have developed a comprehensive framework for modelling SSPVT solar collectors. The framework can be used to determine the efficiency limits of such collectors and to indicate how these limits can be approached through the selection of optimal designs and materials. This work promotes and provides guidance to the design, development and deployment of next-generation solar systems. (2021-02-08)

3D-printed spectrometer on a 100 x100 μm² footprint
The miniaturisation of spectroscopic measurement devices opens novel information channels in medical science or consumer electronics. Scientists of the University of Stuttgart, Germany, developed a 3D-printed miniature spectrometer with a volume of 100 × 100 × 300 μm³ and a spectral resolution of up to 10 nm in the visible range. This spectrometer can be manufactured directly onto camera sensors, and a parallel arrangement allows for quick (''snapshot'') and low profile, highly customizable hyperspectral cameras. (2021-02-08)

Silicon waveguides move us closer to faster, light-based logic circuits
IBM researchers have succeeded in guiding visible light through a silicon wire efficiently, an important milestone in the exploration towards a new breed of faster, more efficient logic circuits. (2021-02-08)

'Multiplying' light could be key to ultra-powerful optical computers
New type of optical computing could solve highly complex problems that are out of reach for even the most powerful supercomputers. (2021-02-08)

Biosensors to detect P. jirovecii, responsible for Pneumocystis pneumonia
Currently, the detection of the fungus in patients, who may be asymptomatic carriers until they develop pneumonia, uses the PCR technique, which takes several hours and requires adequate facilities and qualified personnel. However, the application of nanotechnology now makes it possible to develop more sensitive and efficient biosensors to detect specific sequences corresponding to pathogens responsible for infectious diseases in a shorter time and without the need for major infrastructure. (2021-02-05)

RUDN University mathematicians reduced neural network size six times without post-training
A team of mathematicians from RUDN University found a way to reduce the size of a trained neural network six times without spending additional resources on re-training it. The approach is based on finding a correlation between the weights of neural connections in the initial system and its simplified version. (2021-02-05)

Scientists optimized technology for production of optical materials for microelectronics
Scientists of Far Eastern Federal University (FEFU) have advanced the technology of high-speed sintering for optical ceramics (Nd3+:YAG), i.e. active elements generating laser emission in the near-infrared wavelength range (1.06 μm) for cutting the edge microelectronics and medicine. The researchers have managed to reduce significantly the initial nanopowders consolidation period (10 - 100 times) forming a nanostructure with ensured high optical transparency of the ceramic material. A related article appears in Optical Materials. (2021-02-04)

An optical coating like no other
The technology, based on Fano resonance, results in a coating that fully reflects only a very narrow wavelength. The technology could improve the effectiveness of devices that use hybrid thermal-electric power generation as a solar energy option. (2021-02-04)

Large-area periodic perovskite nanostructures for lenticular printing laser displays
We fabricated large-area periodic structures with spatial resolution at wavelength scale from hybrid perovskite materials via a space-confined solution growth method. It takes advantages of both high refractive index contrast and high luminescence brightness, which allows the optical modulation on not only the reflection of illumination, but also the light emission from hybrid perovskites. The distributed feedback within these periodic structures significantly improves the degree of polarization and directionality of laser action while its threshold is also reduced. (2021-02-04)

Switching nanolight on and off
The report demonstrates a new method to control the flow of light of nanolight. Optical manipulation on the nanoscale, or nanophotonics, has become a critical area of interest as researchers seek ways to meet the increasing demand for technologies that go well beyond what is possible with conventional photonics and electronics. (2021-02-04)

Pioneering technique paves way for fast and cheap fabrication of rapid medical diagnostic tools
New technology developed by the University of Bristol has the potential to accelerate uptake and development of on-chip diagnostic techniques in parts of the world where rapid diagnoses are desperately needed to improve public health, mortality and morbidity. (2021-02-03)

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