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1,000+ results for "Optics"

Creating switchable plasmons in plastics

Scientists at Linköping University develop optical nanoantennas made from a conducting polymer, allowing for controllable nano-optical components. The antennas react to light and can be switched on and off, making them suitable for applications such as smart windows.

SourceLinköping University·JournalNature Nanotechnology·DateDec 9, 2019

Research affirms imaging technique's ability to characterize healthy and non-healthy tissue

A study published in SPIE Journal of Biomedical Optics found that diffuse reflectance spectroscopy can reliably discriminate between healthy tissue and tumor tissue, regardless of neoadjuvant chemotherapy status. The technique's feasibility for tumor-margin assessment during breast-conserving surgery has been demonstrated.

SourceSPIE--International Society for Optics and Photonics·JournalJournal of Biomedical Optics·DateNov 27, 2019

Thanks to a world record in tomography, synchrotron radiation can be used to watch how metal foam forms

Scientists have developed a new imaging method called tomoscopy using synchrotron radiation to observe the foaming of liquid metals in great detail. This technique allows for the analysis of dynamic processes with high temporal resolution, providing insights into material distribution and pore formation.

All-optical diffractive neural network closes performance gap with electronic neural networks

Researchers have developed an all-optical diffractive neural network that achieves unprecedented levels of inference accuracy, closing the performance gap with electronic neural networks. The design incorporates a differential detection scheme, which enables specialized sub-networks to recognize specific object classes.

Designing a light-trapping, color-converting crystal

Researchers at Stanford University have designed a crystal structure that can trap and convert both infrared and green laser light, significantly improving the efficiency of this process. The device, which is microscopic in size, has the potential to greatly benefit technologies in telecommunications, computing, and laser-based equipment.

SourceStanford University·JournalOptica·DateAug 7, 2019

Shape shifting mirror opens a vista for the future

Researchers at Osaka University have developed a glue-free bimorph deformable mirror that can be used in vacuum chambers. The new technology uses inorganic silver nanoparticles to bond PZT actuators to a mirror substrate, allowing for precise shape modification and high-precision optics.

SourceOsaka University·JournalReview of Scientific Instruments·DateMar 28, 2019

A new 'twist' on 3D printing renders 'The Thinker,' and other objects

Researchers have developed a new 3D printing method that allows for the rapid rendering of complex objects by rotating photosensitive material in an evolving light field. This approach enables printing times of under two minutes and has potential applications in fields such as patient-specific medical devices, optics, and aerospace.

Exoplanet stepping stones

Scientists at the W.M. Keck Observatory have made robust data on a young giant gas planet, confirming its water composition and lack of methane. The team is perfecting their technique using advanced instrumentation to study giant planets and prepare for future searches for life on Earth-like exoplanets.

New technology to allow 100-times-faster internet

Researchers at RMIT University have developed a new nanophotonic device that can encode and process data using twisted light beams, increasing bandwidth by up to 100 times. This technology has the potential to revolutionize optical communications and quantum computing research.

SourceRMIT University·JournalNature Communications·DateOct 24, 2018

Physics: Not everything is where it seems to be

Physicists at University of Innsbruck and TU Wien demonstrate that elliptical polarization causes a spiral shape in light wavefronts, leading to a distorted image of actual structures. This systematic error can affect biomedical research, super-resolution microscopy, and even astronomical object position estimation.

SourceUniversity of Innsbruck·JournalNature Physics·DateOct 15, 2018

Transition metal dichalcogenides could increase computer speed, memory by a million times

Researchers propose using transition metal dichalcogenides (TMDCs) to build faster computers that can process information in femtoseconds, a million times faster than current electronics. TMDCs have the potential to increase computer memory speed by a millionfold due to their unique hexagonal lattice structure and optical properties.

SourceGeorgia State University·JournalPhysical Review B·DateOct 2, 2018

New compact hyperspectral system captures 5-D images

A new compact hyperspectral system captures 5-D images with high speed and accuracy, benefiting applications such as optical-based sorting and personal medical monitoring. The system uses structured light to create detailed digital archives of historically valuable artifacts.

SourceOptica·JournalOptics Express·DateAug 28, 2018

Handheld probe images photoreceptors in children

Duke University researchers have developed a handheld probe that can image individual photoreceptors in the eyes of infants, allowing for early detection of eye diseases and brain-related traumas. The new technology uses adaptive optics and is much smaller and faster than previous systems, making it ideal for imaging young children.

SourceDuke University·JournalOptica·DateAug 23, 2018