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Research & Technology News
Integrated Photonic Circuits Demonstrate Ultralow Loss
LAUSANNE, Switzerland, April 27, 2021 — Researchers at École polytechnique fédérale de Lausanne’s (EPFL’s) School of Basic Sciences have developed a technology that produces silicon nitride integrated photonic circuits with low optical losses and small footprints. Silicon is favored as a material for integrated photonic chips due to its abundance and optical properties, though the material has an optical loss orders of magnitude higher than that of silicon nitride. As a result, silicon
Silver Ions’ Dispersion from Alloys Benefits Optical Sensors, Other Applications
HOUSTON, April 27, 2021 — A study led by Rice University and the University of Duisburg-Essen in Germany used hyperspectral dark-field imaging microscopy to reveal the multistep mechanism that causes silver ions to dissipate from gold-silver alloy nanoparticles. Gold-silver...
2D Microlaser Arrays Enhance Stability, Power
RESEARCH TRIANGLE PARK, N.C., April 26, 2021 — Researchers from the University of Pennsylvania and Duke University designed and built 2D arrays of closely packed microlasers that demonstrated the stability of a single microlaser and that collectively achieved power density that were orders of...
Laser Pulses Trigger Ultrafast Material Property Shift
BERLIN, April 26, 2021 — Researchers from the Fritz Haber Institute of the Max Planck Society and the Max Planck Institute for the Structure and Dynamics of Matter demonstrated the ability to use light to achieve a novel type of ultrafast switch. The efforts stem from the...
Optical Device Tunes Light One Photon at a Time
STANFORD, Calif., April 26, 2021 — Stanford University researchers developed an optical device that enables the fine-tuning and changing of frequencies of individual photons in a stream of light, to virtually any mixture of colors. The new photonic architecture has potential...
Metalens Will Deliver on Challenging Printing Applications, Direct Laser Lithography
EVANSTON, Ill., April 23, 2021 — A team at Northwestern University designed a high-numerical aperture metalens and fabricated it on an optical fiber tip, using a set of processes that establishes an alternate path for optical nanoparticle trapping and other imaging applications...
Light and Superconductors Join to Boost AI
GAITHERSBURG, Md., April 22, 2021 — At the National Institute of Standards and Technology (NIST), researchers proposed an approach to large-scale artificial intelligence that focuses on integrating photonic components with superconducting electronics as opposed to semiconducting...
Terahertz Optoacoustic Method Images Water-Rich Samples
BELLINGHAM, Wash., April 22, 2021 — A research team led by Zhen Tian and Jiao Li at Tianjin University developed a method for analyzing water-rich samples using time-domain terahertz (THz) optoacoustics. The method overcomes a bottleneck that prevented the use of THz radiation in the...
Flexible, Wearable Sensor Detects Gas Leaks Instantly
POHANG, South Korea, April 20, 2021 — A wearable hologram sensor is able to instantly notify its user of the presence of volatile gases. The wearable device overcomes issues of high expense associated with current gas sensing technology, addressing the needs of workers in hazardous...
Nonlinear Near-Field Optical Microscopy Images Evanescent Waves in Real Time
HAIFA, Israel, April 19, 2021 — Researchers from Technion-Israel Institute of Technology demonstrated an approach for obtaining images of evanescent waves that uses nonlinear wave-mixing. The microscopy method allowed the researchers to fully reconstruct the electromagnetic field...
Photonic MEMS Switches Show Promise for Datacom
BELLINGHAM, Wash., April 19, 2021 — Members of an international collaboration initiated by researchers at the University of California, Berkeley used a commercially available CMOS fabrication process to develop a photonic switch based on MEMS technology. The ability to microfabricate...
White Solar-Reflectance Paint Reduces Need for Air Conditioning
WEST LAFAYETTE, Ind., April 16, 2021 — A team from Purdue University has developed an improved ultrawhite paint that, tests showed, reflected more than 98% of sunlight — compared to 95.5% of sunlight that an earlier version of the paint reflected following its introduction in...
Light Penetrates Opaque Materials, Emerges Largely Unchanged
VIENNA, April 15, 2021 — A special class of lightwaves possesses the physical qualities that make it able to emerge largely unchanged upon penetrating disordered media. A team from the Vienna University of Technology (TU Wien) and Utrecht University determined that, for any...
Light-Activated Molecule Eliminates Alzheimer’s Protein in Live Mice
TOKYO, April 15, 2021 — Research from the University of Tokyo has demonstrated the efficacy of a small, light-activated molecule in removing clumps of amyloid protein found in the brains of mice with Alzheimer’s disease. If perfected for use in humans, the method...
NIST’s Agricomb Measures Gas Emissions from Cows
GAITHERSBURG, Md., April 14, 2021 — The “agricomb,” an optical frequency comb developed by researchers from the National Institute of Standards and Technology (NIST), is able to measure gas emissions from cow eructation and flatulence. The device may as a result aid in the...
Optical System to Identify Preterm Labor Receives Patent
MIAMI, April 13, 2021 — Jessica Ramella-Roman of Florida International University (FIU) received a patent for an optical technology designed to identify preterm labor. The patent is the culmination of years of research into polarized light and its utility in the study of...
Tissue-Integrated Microlasers Measure Beating Heart of Zebra Fish
ST. ANDREWS, Scotland, April 13, 2021 — An imaging method developed by researchers at the University of St. Andrews aims to overcome difficulties in analyzing and imaging the beating heart. Researchers integrated tiny lasers into heart muscle cells of live zebra fish to acquire...
New Phase in Optical Bose-Einstein Condensate Raises Quantum Communication Possibilities
BONN, Germany, April 12, 2021 — Led by University of Bonn professor Martin Weitz, researchers have observed a previously unknown phase transition in the optical Bose-Einstein condensate. The state is known as an overdamped phase, and it may be relevant for encrypted quantum...
Cuprous Iodide Film Shows Promise for Semiconductors, Optoelectronics
SAITAMA, Japan, April 9, 2021 — Physicists from RIKEN have taken a step to enhance semiconductor performance, developing a single-crystal thin film of cuprous iodide. The film is atomically flat and free of any defects. Conventional approaches for fabricating thin films of cuprous...
Reverse-Tapering Approach Links Structurally Dissimilar Optical Fibers
SHANGHAI, April 9, 2021 — A team of researchers from Fudan University has achieved robust mode matching between structurally dissimilar optical fibers, using a “reverse-tapering” approach to deliver ultralow-loss and high-strength fusion splices between standard...
Tunable Smart Surfaces Cover Visible Spectrum and Beyond
MANCHESTER, England, April 9, 2021 — Work from the University of Manchester outlines applications for smart surface technology that covers the entire electromagnetic spectrum, including the visible light region. Applications for the new optical devices range from next-generation...
Polymer Molecules Fluoresce After Chemical Adjustments
ZURICH, April 8, 2021 — ETH Zurich researchers have introduced a method that relies on chemical adjustments occurring in fluorescent organic polymer molecules to generate a broad palette of color. The approach is an alternative to mixing different molecules to achieve...
Single-Pixel Detector Classifies Images Using Diffractive Optical Network
LOS ANGELES, April 8, 2021 — A single-pixel machine vision framework leverages deep-learning designed optical networks to bypass the need for an image sensor-array or digital processor. The system, developed in the lab of UCLA Chancellor’s Professor Aydogan Ozcan, paves...
Simple Laser Delivers High-Dimensional, Quantum-Like Classical Light
CHANGCHUN, China, April 7, 2021 — An international team from China and South Africa used a laser to create an arbitrary dimensional light that team members characterized as “quantum like.” Using a simple laser commonly available in university teaching labs, the team...
Broadband MIR Source Facilitates Fiber Optic Sensors
TOKYO, April 6, 2021 — A light source that generates a highly stable broadband mid-infrared (MIR) beam in the wavelength range of 2.5 to 3.7 μm and that, in testing, maintained its full brightness due to its high beam quality supports the simplification of fiber...
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July 2024
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