1. 8 Jun 2022 Journal Article Ultramicroscopy

    Elastic and inelastic mean free paths for scattering of fast electrons in thin-film oxides

    Adham Basha, George Levi, Tamir Amrani, Yang Li, Guy Ankonina, Pini Shekhter, Lior Kornblum, Ilan Goldfarb, Amit Kohn
    Abstract

    Quantitative transmission electron microscopy (TEM) often requires accurate knowledge of sample thickness for determining defect density, structure factors, sample dimensions, electron beam and X-ray photons signal broadening. The most common thickness measurement is by Electron Energy Loss Spectroscopy which can be applied effectively to crystalline and amorphous

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  2. 1 Jun 2022 Journal Article ACS Applied Materials & Interfaces

    Radiofrequency Schottky Diodes Based on p-Doped Copper(I) Thiocyanate (CuSCN)

    Dimitra G Georgiadou, Nilushi Wijeyasinghe, Olga Solomeshch, Nir Tessler, Thomas D Anthopoulos
    Abstract

    Schottky diodes based on inexpensive materials that can be processed using simple manufacturing methods are of particular importance for the next generation of flexible electronics. Although a number of high-frequency n-type diodes and rectifiers have been demonstrated, the progress with p-type diodes is lagging behind, mainly due to the intrinsically low conductivities

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  3. 26 May 2022 Journal Article npj 2D Materials and Applications

    Monolithic In2Se3–In2O3 heterojunction for multibit non-volatile memory and logic operations using optoelectronic inputs

    Abstract

    Stable ferroelectricity at room-temperature down to the monolayer limit, harnessed with strong sensitivity towards visible-to-near-infrared illumination in α-In2Se3, facilitates its potential as versatile building block for developing ultrathin multifunctional photonic integrated networks. Herein, we demonstrated a planar ferroelectric-semiconductor heterojunction

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  4. 4 Apr 2022 Journal Article Acta Materialia

    Solid-state dewetting of thin Au films on oxidized surface of biomedical TiAlV alloy

    Abstract

    Recent applications of solid-state dewetting for the functionalization of medical implants raise the question of the thin film dewetting kinetics on surfaces with natural roughness. In this work, we studied the initial stages of solid-state dewetting of thin nanocrystalline gold (Au) films deposited on an oxidized surface of a biomedical titanium-aluminum-vanadium

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  5. 1 Apr 2022 Journal Article Journal of Applied Physics

    Light-induced trap emptying revealed by intensity-dependent quantum efficiency of organic solar cells

    Dan Liraz, Pei Cheng, Yang Yang, Nir Tessler
    Abstract

    Revisiting the intensity-dependent quantum efficiency (IDQE) technique in the context of non-fullerene acceptors, we find that at forward-bias conditions, the response exhibits what seems to be anomalous behavior that is not consistent with light excitation induced trap filling. Analysis based on the Shockley–Read–Hall model leads to the conclusion that the contacts

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  6. 24 Mar 2022 Journal Article Physical Review Letters

    Enhanced Cooper-Pair Injection into a Semiconductor Structure by Resonant Tunneling

    Abstract

    We demonstrate enhanced Andreev reflection in a Nb / InGaAs / InP -based superconductor-semiconductor hybrid device resulting in increased Cooper-pair injection efficiency, achieved by Cooper-pair tunneling into a semiconductor quantum well resonant state. We show this enhancement by

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  7. 18 Mar 2022 Journal Article Nature Communications

    Silicon-photonics acoustic detector for optoacoustic micro-tomography

    Abstract

    Medical ultrasound and optoacoustic (photoacoustic) imaging commonly rely on the concepts of beam-forming and tomography for image formation, enabled by piezoelectric array transducers whose element size is comparable to the desired resolution. However, the tomographic measurement of acoustic signals becomes increasingly impractical for resolutions beyond 100 µm due to

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  8. 16 Mar 2022 Preprint arXiv

    Tunable photon-induced spatial modulation of free electrons

    Abstract

    Spatial modulation of electron beams is an essential tool for various applications such as nanolithography and imaging, yet its implementations are severely limited and inherently non-tunable. Conversely, light-driven electron spatial modulation could potentially allow arbitrary electron wavefront shaping via the underlying mechanism of photon-induced near-field electron

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  9. 8 Mar 2022 Preprint arXiv

    DC Signature of snap-through bi-stability in carbon nanotube resonators

    Abstract

    Bi-stable arched beams exhibiting Euler-Bernoulli snap-through buckling are vastly used as electronic devices in various applications, such as memory devices, energy harvesters, sensors, and actuators. Recently, we reported the realization of the smallest bi-stable resonator to date, in the form of a buckled suspended carbon nanotube (CNT), which exhibits a unique

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  10. 7 Mar 2022 Journal Article Physical Review Letters

    Nonlinear Forced Response of Plasmonic Nanostructures

    Abstract

    Incorporating optical surface waves in nonlinear processes unlocks unique and sensitive nonlinear interactions wherein highly confined surface states can be accessed and explored. Here, we unravel the rich physics of modal-nonmodal state pairs of short-range surface plasmons in thin metal films by leveraging “dark nonlinearity”—a nonradiating nonlinear source. We control

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