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Light meets deep learning: computing fast enough for next-gen AI

Researchers developed a novel design for the chip using a crossbar layout, outperforming state-of-the-art photonic counterparts in terms of scalability and technical versatility. The synergy of powerful photonics with the novel crossbar architecture enables next generation neuromorphic computing engines.

SourceInstitute of Electrical and Electronics Engineers·JournalIEEE Journal of Selected Topics in Quantum Electronics·TypeLiterature review·DateMar 22, 2023

Scientists open door to manipulating ‘quantum light’

Researchers at the University of Sydney and the University of Basel have demonstrated the ability to manipulate and identify small numbers of interacting photons with high correlation. This achievement represents a significant step towards advancing medical imaging and quantum computing technologies.

SourceUniversity of Sydney·JournalNature Physics·TypeExperimental study·DateMar 20, 2023

CityU scientists develop energy-saving, tunable meta-devices for high-precision, secure 6G communications

A research team at City University of Hong Kong invented a tunable terahertz meta-device that can control the radiation direction and coverage area of THz beams. The device allows for signal delivery to specific users or detectors and has flexibility to adjust the propagating direction, as needed.

SourceCity University of Hong Kong·JournalScience Advances·TypeExperimental study·DateMar 16, 2023

Casting light on counterfeit products through nano-optical technology

Researchers developed a novel 3D printed nano optical security label with 33 possible combinations, utilizing higher dimensional structured light and incoherent white light illumination. This technology has the potential to revolutionize anti-counterfeiting methods and provide a powerful platform for advanced information security.

SourceSingapore University of Technology and Design·JournalNature Nanotechnology·DateMar 14, 2023

Hotter than infinity – light pulses can behave like an exotic gas

Researchers at the Universities of Jena and Central Florida have created a photon gas that exhibits behavior similar to a conventional gas, with particles moving at different speeds but maintaining a mean velocity defined by temperature. This phenomenon, known as negative temperature, can be cooled or heated, allowing for the creation ...

SourceFriedrich-Schiller-Universitaet Jena·JournalScience·TypeExperimental study·DateMar 10, 2023

CityU scholars unify color systems using prime numbers

Researchers from City University of Hong Kong developed a unified colour system based on prime numbers, called C<sub>235</sub>, which can represent various colours more efficiently than existing systems like RGB and CMYK. The new colour system has potential applications in designing energy-saving LCD systems and colourizing DNA codons.

SourceCity University of Hong Kong·JournalLight Science & Applications·TypeComputational simulation/modeling·DateMar 2, 2023

Scientists push the boundaries of manipulating light at the submicroscopic level

Researchers at the University of Southampton have demonstrated that a beam of light can be confined to an area 50 times smaller than its own wavelength and even move it at the point of confinement. This breakthrough could lead to advanced manipulation techniques for nanoparticles, biological particles, and microscopic sensors.

SourceUniversity of Southampton·JournalOptica·TypeComputational simulation/modeling·DateMar 2, 2023

Aston University researchers discover more accurate way of checking blood flow in type 2 diabetes patients

Researchers at Aston University have discovered a new approach to process LDF light signals, allowing for more precise measurement of blood flow in specific areas of the vascular bed. This innovation has shown significant improvement in diagnostic accuracy for detecting microvascular changes in patients with type 2 diabetes and age-spe...

SourceAston University·JournalIEEE Transactions on Biomedical Engineering·TypeRandomized controlled/clinical trial·DateFeb 8, 2023

Technology development could bring Raman microscopy to the clinic

Researchers developed high-throughput Raman microscope for rapid large-area imaging hundreds of times faster than traditional approach. The new technique enables label-free molecular analysis and multiplex chemical imaging, holding promise for efficient medical diagnoses and drug development.

SourceOptica·JournalBiomedical Optics Express·DateFeb 7, 2023

Researchers use lead recycled from car batteries to make photodetectors

A team of researchers developed an efficient strategy to recycle lead from discarded car batteries, creating a new market for recycled lead in high-tech equipment. The resulting photodetectors show excellent stability and fast response speeds, with potential applications in optical communication, chemical analysis, and imaging.

SourceOptica·JournalOptics Letters·DateFeb 2, 2023

Researchers create first supermode optical resonator

The new optical resonator developed by Capasso's team provides precise control over the mode of light and enables multi-mode coupled light to exist within the resonator. This breakthrough could influence how resonators are understood and open doors for new capabilities, including fundamental physics experiments and manipulation of mate...

Researchers achieve the first observation of de Broglie-Mackinnon wave packets by exploiting loophole in 1980’s-era laser physics theorem

University of Central Florida researchers observed de Broglie-Mackinnon wave packets, a long-standing theoretical concept, by exploiting a loophole in 1980's-era laser physics theorem. The team's use of space-time wave packets, which resist stretching in dispersive media, verifies predicted properties and opens the path to studying top...

SourceUniversity of Central Florida·JournalNature Physics·TypeExperimental study·DateJan 26, 2023

New detector could enable high-speed quantum communication

Researchers have developed a new detector that can precisely measure single photons at very high rates, enabling practical high-speed quantum communication. The PEACOQ detector is made of superconducting nanowires and operates at extremely cold temperatures, allowing for precise measurement of photon arrival times.

SourceOptica·JournalOptica·DateJan 26, 2023

Nanoparticles make it easier to turn light into solvated electrons

Scientists at Rice University, Stanford University, and UT Austin have developed a mechanism to generate solvated electrons through plasmon resonance, making it easier to turn light into these clean, zero-byproduct chemicals. This breakthrough could lead to new ways of driving chemical reactions and reducing greenhouse gas emissions.

SourceRice University·JournalProceedings of the National Academy of Sciences·TypeExperimental study·DateJan 18, 2023

Integrated photonic circuits could help close the 'terahertz gap'

Researchers at EPFL have developed a new thin-film circuit that produces finely tailorable terahertz-frequency waves, enabling precise control over frequency, wavelength, amplitude, and phase. This breakthrough has significant implications for future electronics, telecommunications, spectroscopy, and quantum applications.

SourceEcole Polytechnique Fédérale de Lausanne·JournalNature Communications·TypeExperimental study·DateJan 12, 2023

Columbia University and partners win $35M JUMP 2.0 grant to create Center for Ubiquitous Connectivity

The Center for Ubiquitous Connectivity (CUbiC) aims to flatten the computation-communication gap by delivering seamless Edge-to-Cloud connectivity with transformational reductions in energy consumption. Led by Columbia Engineering Professor Keren Bergman, CUbiC will create new ultra-energy efficient technologies and system architectures.

Prospects and applications of on-chip lasers

Research into on-chip lasers has made significant progress, with advancements in material systems and integration technologies. The integration of compact, energy-efficient, and robust laser sources is key to unlocking the potential of photonic integrated circuits. These developments have far-reaching implications for applications in o...

New spectroscopy technique improves trace element detection in liquid

Researchers have developed a new spectroscopy technique called filament- and plasma-grating-induced breakdown spectroscopy (F-GIBS), which improves the sensitivity of trace metal detection in liquid samples. The technique uses fluid jets to analyze aqueous solutions and achieves high precision by avoiding detrimental influences of liqu...

SourceSPIE--International Society for Optics and Photonics·JournalAdvanced Photonics Nexus·DateJan 4, 2023

New 3D live hologram technology to save lives in field hospitals

Researchers at ARC Centre of Excellence for Transformative Meta-Optical Systems have developed a miniaturized optical system that can be integrated on a chip, allowing for the creation of 3D holograms. This technology has the potential to replace current 2D imaging, enabling less invasive surgeries and better surgical outcomes.

SourceARC Centre of Excellence for Transformative Meta-Optical Systems·JournalLaser & Photonics Review·TypeExperimental study·DateDec 19, 2022

Unique modulator could change mid-infrared photonic systems for the better

A new MIR all-optical modulator based on an acetylene-filled hollow-core fiber has been developed, enabling gas sensing and medical diagnostics in the mid-infrared range. The device utilizes the photo-thermal effect to achieve phase modulation, allowing for ultra-broadband modulation devices from NIR to MIR.

Photon-efficient volumetric imaging with light-sheet scanning fluorescence microscopy

Researchers developed a photon-efficient volumetric imaging method, laterally swept light-sheet microscopy (iLSLM), which improves axial resolution and optical sectioning while reducing photobleaching. iLSLM outperforms conventional methods like swept focus light-sheet microscopy in terms of resolution and photon efficiency.

SourceSPIE--International Society for Optics and Photonics·JournalAdvanced Photonics Nexus·DateDec 5, 2022

Milestone for laser technology

A team of researchers from Synchrotron SOLEIL, France, and Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Germany, has successfully demonstrated a free-electron laser driven by plasma acceleration and seeded by additional light pulses. This achievement could lead to the development of more compact and affordable FEL systems.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalNature Photonics·TypeExperimental study·DateDec 5, 2022