Results 91 to 100 of about 11,729,249 (285)
Advanced Science, EarlyView.We demonstrate that the inverse relationship between viscosity and conductivity in structured electrolytes can be circumvented by leveraging their hydrogen bonding networks for Grotthuss proton transport. Using a mixture of imidazole and levulinic acid, we show that the existence of extended hydrogen‐bonded chains that can rapidly reorient result in ...
Benworth B. Hansen +15 more
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During the 1950s and 1960s, Australia was a world leader in the specialised field of low frequency radio astronomy, with two geographically distinct areas of activity.
Wendt, Harry +2 more
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Advanced Science, EarlyView.Researchers developed and applied a generative artificial intelligence (AI) model to optimize epsilon‐near‐zero thin film stacks for ultra‐broadband perfect absorption of light. The fabricated AI‐designed absorber, with a total thickness of only 160 nm, experimentally demonstrated an absorption bandwidth exceeding 1000 nm while maintaining greater than
David Dang +10 more
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The Australian Mid-latitude Continental Ionosphere with Respect to Low-frequency Radio Astronomy [PDF]
, 2016 The ionosphere above the Murchison Radio Observatory (MRO) has been characterised over half of solar cycle 24 and its response to impinging low-frequency radio waves described.
Herne, David Edwin
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Ionospheric Phenomena and Low-Frequency Radio Astronomy
, 2014 The Murchison Widefield Array radio telescope (MWA), situated on the Murchison Radio Observatory (MRO) in Western Australia, has recently commenced operations. This instrument operates over the frequency range 80-300 MHz.
Lynch, Mervyn +3 more
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Optical Access to Dark Excitons Via Spin–Phonon Fano Interference
Advanced Science, EarlyView.Dark excitons in quantum dots neither absorb nor emit light and stay hidden from optical spectroscopy. Quantum interference now reveals them: light scattered by acoustic phonons interferes with a phonon‐assisted spin flip between bright and dark exciton, carving a Fano dip into the spectrum whose position gives the bright–dark splitting. Magnetic field,
Janina J. Schindler +7 more
wiley +1 more source
MULTIFUNCTIONAL DIGITAL RECEIVER-SPECTROMETER
Radio Physics and Radio Astronomy, 2014 A new two-channel digital receiver-spectrometer whose parameters and functional capabilities are optimized to provide its effective use in decameter telescopes, as well as in other systems where high precision and synchronization of measurements are ...
O. Y. Vasilyev +5 more
doaj +1 more source
Skyrmion Bubbles by Design in a Centrosymmetric Kagome Magnet
Advanced Science, EarlyView.Chemical tuning of magnetocrystalline anisotropy in the centrosymmetric kagome magnet TmMn6Sn6 is shown to drive a spin reorientation transition via an intermediate magnetic fan state and to stabilize an emergent skyrmion bubble lattice. Four‐dimensional cryogenic Lorentz scanning transmission electron microscopy confirms the nanoscale texture ...
Mohamed El Gazzah +6 more
wiley +1 more source
Microwave amplification based on quasiparticle SIS up and down frequency converters
AIP Advances, 2018 Heterodyne instruments have recently attained quantum-limited low-noise performance, particularly in radio astronomy, but it is difficult to develop large heterodyne arrays such as a modern radio camera using cryogenic sensitive detectors based on ...
T. Kojima, Y. Uzawa, W. Shan
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Metasurface‐Based Multidimensional Light‐Field Manipulation: From Technologies to Applications
Advanced Science, EarlyView.Multidimensional metasurfaces enable versatile manipulation of multiple optical degrees of freedom, including phase, amplitude, polarization, wavelength, and orbital angular momentum. This review summarizes their fundamental mechanisms, emerging strategies for multidimensional light‐field control, and key applications in optical computing, imaging ...
Heliang Yin +6 more
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