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Spin polarized supercurrents optimized with a simple flip

(Phys.org) -- Researchers from Michigan State University, the NIST Center for Neutron Research, and the NIST Center for Nanoscale Science and Technology have discovered the key to controlling and enhancing the lossless flow of a current with a single electron spin state in a standard superconducting device.

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Does the quantum wave function represent reality?

(Phys.org) -- At the heart of quantum mechanics lies the wave function, a probability function used by physicists to understand the nanoscale world. Using the wave function, physicists can calculate a system's future behavior, but only with a certain probability. This inherently probabilistic nature of quantum theory differs from the certainty with which scientists can describe the classical world, leading to a nearly century-long debate on how to interpret the wave function: does it representative objective reality or merely the subjective knowledge of an observer?

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Novel plasmonic material may merge photonic and electronic technologies

Helping bridge the gap between photonics and electronics, researchers from Purdue University have coaxed a thin film of titanium nitride into transporting plasmons, tiny electron excitations coupled to light that can direct and manipulate optical signals on the nanoscale. Titanium nitride's addition to the short list of surface-plasmon-supporting materials, formerly comprised only of metals, could point the way to a new class of optoelectronic devices with unprecedented speed and efficiency.

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Researchers produce ultra-short light pulses using on-chip microresonator

(PhysOrg.com) -- Researchers from the NIST Center for Nanoscale Science and Technology and Purdue University have designed and fabricated an on-chip microresonator that converts continuous laser light into ultra-short pulses consisting of a mix of well-defined frequencies, a technology with applications in advanced sensors, communications systems, and metrology.

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Study resolves century-long debate over how to describe electromagnetic momentum density in matter

(PhysOrg.com) -- Researchers from the NIST Center for Nanoscale Science and Technology and the University of British Columbia have shown that the interaction between a light pulse and a light-absorbing object, including the momentum transfer and resulting movement of the object, can be calculated for any positive index of refraction using a few, well-established physical principles combined with a new model for mass transfer from light to matter.

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CNST collaboration demonstrates nanoscale focused ion beam employing laser-cooled lithium atoms

(PhysOrg.com) -- A team of researchers from the NIST Center for Nanoscale Science and Technology and FEI Company have adapted a commercial focused ion beam (FIB) column to use photoionized laser-cooled lithium atoms as an ion source, and demonstrated that NIST’s patented Magneto-Optical Trap Ion Source (MOTIS) offers imaging performance competitive with the liquid metal ion sources used in most FIBs.

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Researchers efficiently extract photons from single semiconductor quantum dots directly into an optical fiber

(PhysOrg.com) -- Researchers from the NIST Center for Nanoscale Science and Technology have led the development of a new technique for efficiently out-coupling photons from epitaxially-grown quantum dots directly into a standard single-mode optical fiber.

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Polymer characterization ‘tweezers’ turn Nobel theory into benchtop tool

Researchers at UC Santa Barbara have developed a new and highly efficient way to characterize the structure of polymers at the nanoscale – effectively designing a routine analytical tool that could be used by industries that rely on polymer science to innovate new products, from drug delivery gels to renewable bio-materials.

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Coherent diffractive imaging in living color

(PhysOrg.com) -- Exactly 150 years after the first color photograph was produced, scientists have devised a way of employing the full spectrum of colors from synchrotron and free-electron laser x radiation to image nanometer-sized subjects with unprecedented clarity and speed, and in three dimensions. This new research technique is expected to improve imaging on the nanoscale in the quest for advances in pharmaceutical development and new materials for next-generation technologies.

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