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“#Researcher creates an ultra-simple inexpensive method to fabricate optical fiber” Schematic of optical fiber extrusion setup. Credit: Scientific Reports A novel process to fabricate special optical fiber that is far simpler, faster and cheaper than the conventional method has been developed by Cristiano Cordeiro, a researcher and professor at the University of Campinas’s Physics Institute…
“#Sound waves replace human hands in petri dish experiments” Three proof of concept experimental setups that use acoustic tweezers in Petri dishes. From left to right, a standing pattern for sorting, a whirlpool for concentrating, and high-frequency beam-like waves for concentration and stimulation. Credit: Tony Huang, Duke University Mechanical engineers at Duke University have demonstrated…
“#Opto-thermoelectric microswimmers” September 4, 2020 feature Conceptual design for optical driving and steering of opto-thermoelectric microswimmers. (a) Under light fields, PS/Au Janus particles are set to swim and rotate alternatively to follow a predefined path. (b) Upon light irradiation on a Janus particle, a temperature gradient ∇T pointing from the PS side to the Au…
“#To make a better sensor, just add noise” Artist’s depiction of a phenomenon called stochastic resonance. Researchers studied this technique to apply it to sensors to detect signals too faint to otherwise capture. Credit: Bessie Terrones, Penn State MRI Adding noise to enhance a weak signal is a sensing phenomenon common in the animal world…
“#Giant leap for molecular measurements” Laser pulses lasting for mere femtoseconds (one-quadrillionth of a second) are stretched to the nanosecond (one-billionth of a second) range. Credit: © 2020 Ideguchi et al. Spectroscopy is an important tool of observation in many areas of science and industry. Infrared spectroscopy is especially important in the world of chemistry,…
“#A new lens on the world: Improving the metalens with liquid crystal” An illustration of how a metalens refracts light. Credit: Giuseppe Strangi & Federico Capasso For more than 500 years, humans have mastered the art of refracting light by shaping glass into lenses, then bending or combining those lenses to amplify and clarify images…
“#Deep learning and metamaterials make the invisible visible” Credit: Bakhtiyar Orazbayev/EPFL By combining purpose-built materials and neural networks, researchers at EPFL have shown that sound can be used in high-resolution imagery. Imaging allows us to depict an object through far-field analysis of the light- and sound-waves that it transmits or radiates. The shorter the wave,…
“#Black phosphorus future in 3-D analysis, molecular fingerprinting” Schematics of an on-chip mid-infrared system based on black phosphorus-silicon hybrid platform. The passive silicon photonic layer serves to guide the mid-infrared light while black phosphorus plays an active role in light emission, modulation and detection. Credit: Bowei Dong and Li Huang Many compact systems using mid-infrared…
“#Researchers observe branched flow of light for the first time” Credit: American Technion Society A team of researchers from the Technion – Israel Institute of Technology has observed branched flow of light for the very first time. The findings are published in Nature and are featured on the cover of the July 2, 2020 issue….
“#Radiation pressure with recoil: Experimental proof for a 90 year-old theory” Credit: CC0 Public Domain Light exerts a certain amount of pressure onto a body: sun sails could thus power space probes in the future. However, when light particles (photons) hit an individual molecule and knock out an electron, the molecule flies toward the light…