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Categories: Engineering: Biometric, Physics: Optics
Published Perovskites, a 'dirt cheap' alternative to silicon, just got a lot more efficient
(via sciencedaily.com) Researchers typically synthesize perovskites in a wet lab, and then apply the material as a film on a glass substrate and explore various applications. A team has instead proposes a novel, physics-based approach, using a substrate of either a layer of metal or alternating layers of metal and dielectric material -- rather than glass.
Published Engineers discover a new way to control atomic nuclei as 'qubits'
(via sciencedaily.com) Researchers propose a new approach to making qubits, the basic units in quantum computing, and controlling them to read and write data. The method is based on measuring and controlling the spins of atomic nuclei, using beams of light from two lasers of slightly different colors.
Published When the light is neither 'on' nor 'off' in the nanoworld
(via sciencedaily.com) Scientists detect the quantum properties of collective optical-electronic oscillations on the nanoscale. The results could contribute to the development of novel computer chips.
Published Chromo-encryption method encodes secrets with color
(via sciencedaily.com) In a new approach to security that unites technology and art, E researchers have combined silver nanostructures with polarized light to yield a range of brilliant colors, which can be used to encode messages.
Published Research reveals thermal instability of solar cells but offers a bright path forward
(via sciencedaily.com) Researchers reveal the thermal instability that happens within the cells' interface layers, but also offers a path forward towards reliability and efficiency for halide perovskite solar technology.
Published Compact, non-mechanical 3D lidar system could make autonomous driving safer
(via sciencedaily.com) A new system represents the first time that the capabilities of conventional beam-scanning lidar systems have been combined with those of a newer 3D approach known as flash lidar. The nonmechanical 3D lidar system is compact enough to fit in the palm of the hand and solves issues of detecting and tracking poorly reflective objects.
Published Controllable 'defects' improve performance of lithium-ion batteries
(via sciencedaily.com) Some defects can be good. A new study shows that laser-induced defects in lithium-ion battery materials improve the performance of the battery.
Published Distortion-free forms of structured light
(via sciencedaily.com) Research offers a new approach to studying complex light in complex systems, such as transporting classical and quantum light through optical fiber, underwater channels, living tissue and other highly aberrated systems.
Published This loofah-inspired, sun-driven gel could purify all the water you'll need in a day
(via sciencedaily.com) Access to clean water is being strained as the human population increases and contamination impacts freshwater sources. Devices currently in development that clean up dirty water using sunlight can only produce up to a few gallons of water each day. But now, researchers in ACS Central Science report how loofah sponges inspired a sunlight-powered porous hydrogel that could potentially purify enough water to satisfy someone's daily needs -- even when it's cloudy.
Published New method for generating spinning thermal radiation uncovered
(via sciencedaily.com) Original source Researchers have made a groundbreaking discovery in the field of thermal radiation, uncovering a new method for generating spinning thermal radiation in a controlled and efficient manner using artificially structured surfaces, known as metasurfaces.
Published Entangled atoms cross quantum network from one lab to another
(via sciencedaily.com) Trapped ions have previously only been entangled in one and the same laboratory. Now, teams have entangled two ions over a distance of 230 meters. The nodes of this network were housed in two labs at the Campus Technik to the west of Innsbruck, Austria. The experiment shows that trapped ions are a promising platform for future quantum networks that span cities and eventually continents.
Published Researchers devise a new path toward 'quantum light'
(via sciencedaily.com) Researchers have theorized a new mechanism to generate high-energy 'quantum light', which could be used to investigate new properties of matter at the atomic scale.
Published Passive radiative cooling can now be controlled electrically
(via sciencedaily.com) Energy-efficient ways of cooling buildings and vehicles will be required in a changing climate. Researchers have now shown that electrical tuning of passive radiative cooling can be used to control temperatures of a material at ambient temperatures and air pressure.
Published Plasma-Structural Coloring: A new colorful approach to an inkless future
(via sciencedaily.com) Original source New developments for achieving structural coloring through plasma irradiation of graphite can reduce the reliance upon harmful color dyes. Colors achieved by plasma irradiation are completely erasable and can be manipulated using time exposed to the plasma irradiation, intensity of the irradiation and the thickness of the graphite layer applied. The application of plasma-structural coloring aims to lessen the environmental toll typical adverse dyes have and combat them with the technology surrounding structural colors.
Published 'Ghostly mirrors' for high-power lasers
(via sciencedaily.com) Original source Laser-driven 'mirrors' capable of reflecting or manipulating light have been produced.
Published New DNA biosensor could unlock powerful, low-cost clinical diagnostics
(via sciencedaily.com) By flagging disease-associated DNA biomarkers, medical professionals can make early diagnoses and provide personalized treatments, but the typical screening methods can be laborious, expensive or limited in scope. Now, a new biosensor could pave the way to accessible and expansive diagnostics.
Published Automatic speaker recognition technology outperforms human listeners in the courtroom
(via sciencedaily.com) The forensic-voice-comparison system, based on state-of-the-art automatic-speaker-recognition technology, outperformed all the listeners.
Published New report offers blueprint for regulation of facial recognition technology
(via sciencedaily.com) A new report outlines a model law for facial recognition technology to protect against harmful use of this technology, but also foster innovation for public benefit.
Published How old is that fingerprint?
(via sciencedaily.com) Forensic dramas on TV make it seem easy to determine when fingerprints were left at the scene of a crime. In reality, the oils in fingerprints degrade over time, and it's difficult to figure out their age. Now, researchers have discovered molecular markers for changes to these oils over a seven-day time period -- information that could be used to estimate fingerprints' ages more accurately.
Published Optical imaging of dynamic interactions between molecules in a cell
(via sciencedaily.com) Researchers develop the 'photoswitching fingerprint analysis'. A unique technology that for the first time allows the analysis of molecular processes and the regulation of individual proteins in living cells with sub-10 nm spatial resolution. The application ranges from biological to medical research.