Van der Waals (vdW) heterostructures assembled from layers of two-dimensional materials have attracted considerable interest due to their novel optical and electrical properties! Engineering phonon polaritons in van der Waals ...ad van ...Engineering phonon polaritons in van der Waals heterostructures to enhance in-plane optical anisotropy By Kundan Chaudhary , Michele Tamagnone , Mehdi Rezaee , D. Kwabena Bediako , Antonio Ambrosio , Philip Kim , Federico Capasso!! Here, we report a scattering-type scanning near-field optical microscopy study of hexagonal boron nitride on black phosphorus (h-BN/BP) heterostructures, demonstrating the first direct observation of in-plane anisotropic phonon polariton modes in vdW heterostructures! Engineering phonon polaritons in van der Waals ...ad van ...van ...Engineering phonon polaritons in van der Waals heterostructures to enhance in-plane optical anisotropy Kundan Chaudhary1*, Michele Tamagnone1*†, Mehdi Rezaee1,2*, D. Kwabena Bediako3, Antonio Ambrosio4, Philip Kim3, Federico Capasso1† Van der Waals (vdW) heterostructures assembled from layer s of two-dimensional materials have attracted ...!! Notably, the measured in-plane optical anisotropy along the armchair and zigzag crystal axes exceeds the ratio of refractive indices of BP in the x-y plane. We explain that this enhancement is due to the high confinement of the phonon polaritons in h-BN. We observe a maximum in-plane optical anisotropy of αmax = 1.25 in the frequency spectrum at 1405 to 1440 cm−1. These results provide new insights into the behavior of polaritons in vdW heterostructures, and the observed anisotropy enhancement paves the way to novel nanophotonic devices and to a new way to characterize optical anisotropy in thin films.
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Binodal, wireless epidermal electronic systems with in-sensor analytics for neonatal intensive care
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In neonatal intensive care units (NICUs), continuous monitoring of vital signs is essential, particularly in cases of severe prematurity! [1807.03339] Engineering Phonon Polaritons in van der ...arxiv.org/abs/1807.03339 Abstract: Van der Waals heterostructures assembled from layers of 2D materials have attracted considerable interest due to their novel optical and electrical properties. Here we report a scattering-type scanning near field optical microscopy study of hexagonal boron nitride on black phosphorous (h-BN/BP) heterostructures, demonstrating the first direct observation of in-plane anisotropic ...!! Current monitoring platforms require multiple hard-wired, rigid interfaces to a neonate's fragile, underdeveloped skin and, in some cases, invasive lines inserted into their delicate arteries. These platforms and their wired interfaces pose risks for iatrogenic skin injury, create physical barriers for skin-to-skin parental/neonate bonding, and frustrate even basic clinical tasks. Technologies that bypass these limitations and provide additional, advanced physiological monitoring capabilities would directly address an unmet clinical need for a highly vulnerable population.
Trump, DeVos bungle Special Olympics budget | TheHill
The contrasting positions played out amid a backdrop of lawmakers grilling agency chiefs about draconian cuts to popular government programs, leaving administration officials with the choice of defending the spending reductions or disagreeing with Trump, who is known to prize loyalty among his Cabinet members
DeVos went before appropriators to defend the administration's proposal to slash $8.5 billion, or 12 percent, from the education budget
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But appropriators seized on the $18 million cut for the Special Olympics, the world's largest sporting event for adults with disabilities. Trump has proposed cutting funding to it in each of his three annual budget proposals.
Battery-free, fully implantable optofluidic cuff system for wireless optogenetic and pharmacologica
Studies of the peripheral nervous system rely on controlled manipulation of neuronal function with pharmacologic and/or optogenetic techniques. Traditional hardware for these purposes can cause notable damage to fragile nerve tissues, create irritation at the biotic/abiotic interface, and alter the natural behaviors of animals. Here, we present a wireless, battery-free device that integrates a microscale inorganic light-emitting diode and an ultralow-power microfluidic system with an electrochemical pumping mechanism in a soft platform that can be mounted onto target peripheral nerves for programmed delivery of light and/or pharmacological agents in freely moving animals. Biocompliant designs lead to minimal effects on overall nerve health and function, even with chronic use in vivo. The small size and light weight construction allow for deployment as fully implantable devices in mice. These features create opportunities for studies of the peripheral nervous system outside of the scope of those possible with existing technologies.
Today is my last Monday living on this orbiting laboratory and I'm soaking up my final views. The @Space_Station is… https://t.co/jLVOc52otE AstroHague (from Johnson Space Center, Houston TX) Mon Sep 30 20:29:51 +0000 2019
Chicago college student "recruited" by Chinese spy agency to steal aerospace engineering secrets. The only way the… https://t.co/5Os7mw2d9Q Jkylebass (from San Francisco and Dallas) Mon Sep 30 15:57:54 +0000 2019
After being launched into space by Kaz and crew, the Colossus encounters engineering problems, which are made worse… https://t.co/2ZiGpVVRjM starwars Mon Sep 30 19:41:56 +0000 2019
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