Science Journals RSS Feeds
Sponsored Links
Recent Comments

    Physics

    What’s MER? It’s a way to measure quantum materials, and it’s telling us new and interesting things

    Experimental physicists have combined several measurements of quantum materials into one in their ongoing quest to learn more about manipulating and controlling the behavior of them for possible applications. They even coined a term for it— Magneto-elastoresistance, or MER. …read more

    Source:: Physorg Physics

          

    New optical technique captures real-time dynamics of cement setting

    Researchers have developed a nondestructive and noninvasive optical technique that can determine the setting times for various types of cement paste, which is used to bind new and old concrete surfaces. The new method could aid in the development of optimized types of cement with less impact on the environment. …read more

    Source:: Physorg Physics

          

    An electrically pumped surface-emitting semiconductor green laser

    Scientists and Engineers have used surface-emitting semiconductor lasers in data communications, for sensing, in FaceID and within augmented reality glasses. In a new report, Yong-Ho Ra and a research team in the departments of Electrical and Computer Engineering, and Advanced Electronics and Photonics in Canada, Korea and the U.S., detailed the first achievement of an all-epitaxial, distributed Bragg reflector (DBR)-free, electrically injected surface-emitting green laser. They optimized the device by exploring the photonic band edge modes formed in dislocation-free gallium nitride nanocrystal arrays, without using conventional DBRs. They operated the device at approximately 523 nm, with a threshold current of 400 A/cm2—an order of magnitude lower than previously reported blue laser diodes. The studies opened a new paradigm to develop low-threshold, surface-emitting laser diodes, ranging from the ultraviolet region to the deep visible range (approximately 200 to 600 nm). At this range, the device performance was not limited by the lack of high-quality DBRs, large lattice mismatch, or substrate availability. The results are now published on Science Advances. …read more

    Source:: Physorg Physics

          

    Quantum physics: Controlled experiment observes self-organized criticality

    Writing in Nature, researchers describe the first-time observation of ‘self-organized criticality’ in a controlled laboratory experiment. Complex systems exist in mathematics and physics, but also occur in nature and society. The concept of self-organized criticality claims that without external input, complex systems in non-equilibrium tend to develop into a critical state far away from a stable equilibrium. That way, they reinforce their own non-equilibrium. …read more

    Source:: Physorg Physics

          

    Deep learning enables real-time imaging around corners

    Researchers have harnessed the power of a type of artificial intelligence known as deep learning to create a new laser-based system that can image around corners in real time. With further development, the system might let self-driving cars “look” around parked cars or busy intersections to see hazards or pedestrians. It could also be installed on satellites and spacecraft for tasks such as capturing images inside a cave on an asteroid. …read more

    Source:: Physorg Physics

          

    Exploring tiny forces with single molecule force spectroscopy

    In terms of space organization, DNA has powers rivaling Marie Kondo. A strand of DNA that is two meters long intricately folds itself into a cell nucleus only 10 microns across. (One of the hairs on your head has a diameter of 100 microns, and you can’t see anything smaller than that without a microscope.) Everything that needs to happen biochemically for the DNA to function hinges upon the precise unpacking and unwinding of its strands from that tiny space. …read more

    Source:: Physorg Physics

          

    Predicting hydraulic fracture propagation more accurately

    Researchers at EPFL have developed a new model to calculate hydraulic fracture propagation. Acclaimed for its accuracy by experts, the model better predicts fracture geometry and the energy cost of hydraulic fracturing—a widely used technique in areas such as CO2 storage, hydrocarbon extraction, dams and volcano hazard monitoring. …read more

    Source:: Physorg Physics

          

    Spinning quantum dots

    The name ‘quantum dots’ is given to particles of semiconducting materials that are so tiny—a few nanometres in diameter—that they no longer behave quite like ordinary, macroscopic matter. Thanks to their quantum-like optical and electronic properties, they are showing promise as components of quantum computing devices, but these properties are not yet fully understood. Physicists Sanjay Prabhakar of Gordon State College, Georgia, USA and Roderick Melnik of Wilfrid Laurier University, Waterloo, Canada have now described the theory behind some of these novel properties in detail. This work is published in The European Physical Journal B. …read more

    Source:: Physorg Physics

          

    Diabolical points in coupled active cavities with quantum emitters

    Diabolical points (DPs) introduce ways to study topological phase and peculiar energy dispersion. Scientists in China and partners from the United Kingdom demonstrated DPs in strongly coupled active microdisks. A new macroscopical control of backscattering based on the competition between defects and quantum emitters was used to achieve DPs. This work paves the way to integrate DPs and more exotic phenomena into quantum information processes with quantum emitters, and will inspire further research with DPs. …read more

    Source:: Physorg Physics

          

    Sponsored Links
    Archives

    Copyright © 2013. All Rights Reserved.