Articles tagged with Optics
A team of scientists demonstrated an optical localization-induced nonlinear competition mechanism to control laser-induced periodic surface structuring. The method produces large-scale high-quality thin-film nanogratings by optimizing laser pulse energy and using laser direct writing.
Polarisation optics offers sensitive sub-cellular structure analysis and compatible imaging/sensing for in vivo applications. The Stokes-Mueller formalism and Mueller matrix describe polarisation states, enabling various measurement approaches and information extraction techniques.
Researchers developed phyllotaxis-alike vortex nanosieves that can generate multiple optical vortices within a single nano-device, enabling compact and efficient multiplexing of orbital angular momentum. The design uses judiciously arranged nanoholes on metal films to create multiple spiral patterns, each contributing to a specific OAM...
Researchers at Chalmers University of Technology have developed a unique optical amplifier that offers high performance, is compact enough to integrate into a chip just millimeters in size, and does not generate excess noise. This breakthrough technology has the potential to revolutionize both space and fiber communication.
Researchers developed a high-precision THz time-domain ellipsometry system to characterize wide-gap semiconductors. The system can measure carrier densities up to 10^20 cm^-3 with superior accuracy and precision, resolving a long-standing challenge in the field.
A team of researchers at Aarhus University aims to develop an optical sensor using terahertz light to decode the direction of tiny magnetic 'tornadoes' called skyrmions. Skyrmions offer a promising candidate for future bits in computer technology, requiring less power and generating less heat than current methods.
Researchers designed electromechanically reconfigurable ultrathin optical elements that can be controlled on a pixel-by-pixel level. These versatile metasurfaces could offer a new chip-based way to achieve nanoscale control of light, leading to better optical displays and information encoding.
Researchers developed lab-on-a-chip optical biosensors for real-time COVID-19 detection, overcoming low viral load challenges. These sensors utilize light beam interactions to detect viruses, enabling faster diagnosis and controlling outbreaks.
Researchers have developed new strategies to optimize multiscale design of macro optics to micro/nanophotonics, enhancing the spectral sensitivity of surface-enhanced Raman and infrared absorption spectroscopies. This enables effective signal detection even for molecules with small scattering or absorption cross-sections.
A team of researchers from Osaka University and international partners used intense mid-infrared laser pulses to alter magnetic anisotropy in a weak ferromagnet. They found that electronic excitation, rather than lattice heating, was responsible for the ultrafast change, enabling faster spintronics devices. This breakthrough has signif...
Researchers develop prototype display that combines multifocal and integral imaging to create ultra-high definition 3D images with almost diffraction-limited resolution. The new approach enables large, high-definition 3D images for digital signs, entertainment, education, and immersive experiences.
A new wavefront shaping method uses a digital micromirror device to modulate light at high speed, enabling precise control of focal spots in biomedical imaging. The method outperforms conventional genetic algorithm methods with improved contrast and optimization speed.
Scientists have discovered a photonic realization of type-II Dirac nodal line semimetal with ring-shaped four-fold band degeneracy. The material exhibits a double-bowl state comprising two sets of almost degenerate perpendicularly polarized surface states, which is distinct from other photonic systems.
Researchers developed an in vivo flow cytometry method to monitor circulating tumor cells, revealing daily oscillations in CTC count that change with the day-night cycle. This discovery suggests a potential circadian rhythm regulating CTC release and could improve clinical detection methods.
A team of scientists developed a novel microcavity sensing technology to study the transition dynamics of poly(N-isopropylacrylamide) using optofluidic microcavities. The self-referencing method decouples multiple effects involved in physical/chemical reactions, allowing for detection of complex processes.
Researchers developed a simple and robust method to map field patterns in silicon microdisks, observing resonant modes with drastically different dynamics. They confirmed chaos-assisted tunneling with unprecedented assurance by directly interrogating the dynamics inside the microcavity.
Researchers developed a precise stopwatch to count single photons, enhancing imaging technologies like forest mapping and disease diagnosis. The new time lens technology improves photon timing resolution by orders of magnitude.
Researchers at Tata Institute of Fundamental Research used extreme magnetic pulses to create large-scale spin patterns, potentially useful for terahertz frequency range electronic devices. The induced spin patterns are robust and stay 'arrested' for up to ten days.
A new compact system enables real-time, in-line 3D inspection of surfaces with micron-scale precision, enhancing quality control in industrial production. The system combines a fast steering mirror and high precision 1D confocal chromatic sensor to create a compact and lightweight measurement tool weighing just 300 grams.
The NIST-developed emberometer uses digital cameras to track embers in mid-air and reconstruct their 3D shapes. This tool helps researchers understand the behavior of embers, which can aid in developing better protection for structures during wildfires.
Researchers create genuine time-dependent topological system using ultracold atoms in periodically-driven optical honeycomb lattices, exhibiting unique electronic properties and chiral edge modes. The system's non-trivial topological properties are rooted in the non-trivial winding of its quasienergy spectrum.
Researchers at Institute for Basic Science develop new method to study superconductors using optical tools, enabling exploration of fluctuating superconductivity. Theoretical model shows significant changes in electric conductivity and light absorption near critical temperature.
Researchers have discovered a method to control the movement of microscopic crystals, enabling precise targeting of diseased organs for drug delivery. The crystals, which exhibit superparamagnetic properties, can be directed using a magnetic field, opening new applications for improving lives.
Researchers have successfully demonstrated quantum entanglement in solid-state devices, a breakthrough that could enable faster and more secure computing. The experiment uses electrons in a superconductor to create entangled pairs, which can be used to enhance computing performance and secure data transmission.
Physicists at NIST have developed a portable atomic clock based on a single mercury ion, outperforming the national standard clock by at least five times. The improved version of the mercury clock maintains accuracy for over 400 million years, opening up new possibilities for ultra-precise timekeeping and frequency standards.
A six-university collaboration, led by UCSB, aims to create a highly compact and energy-efficient chip. The project will utilize electron spin technology for memory, logic, and communications functions. Successful development could lead to breakthroughs in high-density storage, ultra-fast processing, and secure communication.