A peer-reviewed study reports the development of ultrafast modulation technology in nanoelectronics. Physicists from Bielefeld University and the Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden) have introduced a new…
Category: 4. Physics
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Physicists Harness Light To Control Semiconductors in Trillionths of a Second
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Modeling and simulation of optical wireless communication channels in IoUT considering water types turbulence and transmitter selection
An aquatic channel refers to the medium through which signals propagate in underwater communication systems. Unlike terrestrial wireless channels, aquatic channels exhibit unique and complex characteristics due to the presence of water molecules,…
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Achieving 100% amplitude modulation depth in the terahertz range with graphene-based tuneable capacitance metamaterials
Device structure and operating principle
Our device consists of a metamaterial structure having the shape of a periodic brickwork antenna array, Fig. 1a. The structure lies on a dielectric substrate and can be irradiated by a y-polarised…
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Long-lived multilevel coherences and spin-1 dynamics encoded in the rotational states of ultracold molecules
Experimental apparatus
Our experimental apparatus has been extensively described in previous works. Briefly, we prepare individually trapped 87Rb and 133Cs (hereafter Rb and Cs respectively) atoms in arrays of species-specific optical tweezers53,
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Control of collective activity to crystallize an oscillator gas
Toner, J., Tu, Y. & Ramaswamy, S. Hydrodynamics and phases of flocks. Ann. Phys. 318, 170–244 (2005).
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Bricard, A., Caussin, J. B., Desreumaux, N., Dauchot, O. &…
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Real-time observation of topological defect dynamics mediating two-dimensional skyrmion lattice melting
Magnetic multilayer stack
The Ta(5 nm)/Co20Fe60B20(0.9 nm)/Ta(0.07 nm)/MgO(2 nm)/Ta(5 nm) multilayer stack (layer thickness with an accuracy better than 0.01 nm) is deposited by d.c./radio-frequency magnetron sputtering using a…
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Neuromorphic Hebbian learning with magnetic tunnel junction synapses
Subtraction logic for negative weights
Let the parallel (P) and anti-parallel (AP) MTJ conductances be denoted by GP and GAP, respectively, within an MTJ crossbar array G. Let vin be a binarized input voltage vector with values 0 and a fixed…
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Dual-mode narrowband organic photodetectors for self-aligned imaging in NIR-I and NIR-II
The schematic cross-sectional view of the double BHJ OPD, comprising a layer configuration of glass/ITO/ZnO (10 nm)/PM6:IT-4F (1:1) (3.5 µm)/MoO3 (5 nm)/PTB7-Th:COTIC-4Cl:Y6 (1:1.05:0.45) (670 nm)/ZnO (10 nm)/Ag, is shown in Fig. 1a….
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Enhancing 1D ionic conductivity in lithium manganese iron phosphate with low-energy optical phonons
LixMn1−yFeyPO4 (0 < x ≤ 1, 0 ≤ y ≤ 1), which crystallizes in the Pnma space group29,30, can exhibit three distinct Mn and Fe distributions within the unit cell when the Mn: Fe ratio is 1:1, as shown in Fig. 1. The first…
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Network epidemiological analysis of COVID-19 transmission patterns by age, occupation and residence across four waves in Cyprus
Statistical analysis revealed significant heterogeneity in transmission patterns across different waves of the pandemic. For instance, during the first wave, the majority of infected individuals were elderly (70 years and above) especially in…
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