Abstract In‐memory computing, particularly neuromorphic has emerged as a promising solution to overcome the energy and time‐consuming challenges associated with von Neumann architecture. The ferroelectric field‐effect transistor (FeFET) technology, its fast energy‐efficient switching nonvolatile memory, is potential candidate for enabling both computing memory within single transistor. In this study, capabilities of an integrated HfO 2 2D MoS channel FeFET in achieving high‐performance 4‐bit...

Abstract The development of all‐in‐one devices for artificial visual systems offers an attractive solution in terms energy efficiency and real‐time processing speed. In recent years, the proliferation smart sensors growth Internet‐of‐Things (IoT) has led to increasing importance in‐sensor computing technology, which places computational power at edge data‐flow architecture. this study, a prototype sensor inspired by human retina is proposed, integrates ferroelectricity photosensitivity...

The van der Waals (vdWs) heterostructures, with vertical layer stacking structure of various two-dimensional (2D) materials, maintain the reliable photonic characteristics while compensating shortcomings participating individual components. In this work, we combine less-studied multilayer tin selenide (SnSe

Abstract Designing reliable and energy‐efficient memristors for artificial synaptic arrays in neuromorphic computing beyond von Neumann architecture remains a challenge. Here, based on emerging layered nickel phosphorus trisulfide (NiPS 3 ) are reported that exhibit several favorable characteristics, including uniform bipolar nonvolatile switching with small operating voltage (<1 V), fast speed (< 20 ns), high On/Off ratio (>10 2 ), the ability to achieve programmable multilevel...

Abstract Aluminum Scandium Nitride (Al 1−x Sc x N) has received attention for its exceptional ferroelectric properties, whereas the fundamental mechanism determining dynamic response and reliability remains elusive. In this work, an unreported nucleation‐based polarization switching in Al 0.7 0.3 N (AlScN) is unveiled, driven by intrinsic ferroelectricity rooted ionic displacement. Fast switching, characterized a remarkably low characteristic time of 0.00183 ps, captured, effectively...

Memristor crossbar arrays (CBAs) based on two-dimensional (2D) materials have emerged as a potential solution to overcome the limitations of energy consumption and latency associated with conventional von Neumann architectures. However, current 2D memristor CBAs encounter specific challenges such limited array size, high sneak path current, lack integration peripheral circuits for hardware compute-in-memory (CIM) systems. In this work, we demonstrate CIM system leveraging heterogeneous...

The electroreduction nitrate reduction (NO3-RR) provides an environmentally friendly alternative to the traditional Haber-Bosch technology for ammonia (NH3) production. Herein, cupric oxide (CuO) nanobelts (NBs) were synthesized by a simple...

The femtosecond laser micromachining of transparent optical materials offers a powerful and feasible solution to fabricate versatile photonic components towards diverse applications. In this work, we report on new design fabrication ridge waveguides in LiNbO

We present a novel p-gallium nitride (GaN) gate HEMT structure with reduced hole concentration near the Schottky interface by doping engineering in metal-organic chemical vapor deposition (MOCVD), which aims at lowering electric field across gate. By employing additional unintentionally doped GaN (u-GaN) layer, leakage current is suppressed and breakdown voltage boosted from 10.6 to 14.6 V negligible influence on threshold ON-resistance. A Mg u-GaN layer was confirmed secondary-ion mass...

This work demonstrated a high-performance ferroelectric field-effect transistor (FeFET) via the integration of HZO and 2D MoS 2 , showing efficacy in processing diverse real-life tasks within reservoir computing system.

We report on the design and fabrication of straight S-curved waveguides in neodymium-doped yttrium aluminate (Nd:YAP) crystal by using direct femtosecond laser writing. These channel are based hexagonal optical-lattice-like depressed cladding geometry. For each type waveguide, S-curves with three lateral offsets 50 μm, 100 150 μm implemented. good guiding properties low bending losses. With waveguide as cavity, dual-wavelength, 31.6 GHz operating at 1064 nm 1079 have been demonstrated MoS2 a...

CubeSats were conceived with an aim to provide students hands-on, design, build, and test experiences on spacecraft. Many education-class keep the cost of projects low use commercial off-the-shelf (COTS) products. But using parts not designed for space missions often means a compromise in performance (e.g., sensor accuracy, power efficiency) reliability, which makes component testing necessary part development process. Unfortunately, there is no single lab equipment that can integrated...

Spiking neural networks (SNNs) are attracting increasing interests for their ability to emulate biological processes, offering energy-efficient computation and event-driven processing. Currently, no devices known combine both neuronal synaptic functions. This study presents an experimental demonstration of ambipolar WSe

We report on a one-step fabrication method of horizontal dual-line waveguides supporting TE guidance in LiTaO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> crystal utilizing multiple refocusing mechanisms the femtosecond laser. Through nonlinear process, foci can be formed spontaneously with interval few micrometers along laser propagation direction. The number and separation focal spots, even entire length laser-induced tracks, could...

We report on the fabrication of ring-shaped waveguides operating at telecommunication band in a cubic Bi4Ge3O12 (BGO) crystal by using technique femtosecond laser writing. In regions written tracks BGO crystal, positive refractive index is induced, resulting so-called Type I configuration. The modal profiles are within designed track cladding with geometries, which analogous to circular optical lattices. homogenous guidance along both TE and TM polarizations has been obtained wavelength 1.55...

We report on the fabrication of depressed cladding waveguides in periodically poled MgO doped LiTaO3 by using low-repetition-rate femtosecond laser writing, and their use for guided-wave second harmonic generation (SHG). The exhibit different guiding performance along extraordinary ordinary polarizations. temperature-dependent quasi-phase-matching (QPM) is realized to obtain SHG waveguides. results show that QPM temperature was dependent poling period features highest nonlinear conversion...

Thin film of lithium niobate on insulator (LNOI) enables functional devices with compact sectional area and footprint, exhibiting high nonlinear optical conversion efficiencies performance electro-optical modulating. Here we report the simulated results type I phase matching ridge waveguides LNOI platform. We investigate wavelength versus width/height waveguides. The relation (1550 nm–775 nm) between width height at different temperatures are also demonstrated. Our show that wide spectral...

We report on a novel waveguide-based polarization beam splitter (PBS) fabricated by femtosecond (fs) laser in lithium niobate (LiNbO3) crystals. This monolithic PBS is composed of tailored waveguide configurations with different guiding properties which linearly polarized light along extraordinary refractive index (ne) and ordinary (no) can be well separated. At the wavelength 1064 nm, extinction ratio (PER) reach to 16.60 dB 16.18 for ne no polarizations, insertion loss (IL) 3.86 4.15...

We demonstrate second harmonic generations in quasi-phase matched cladding waveguide structures fabricated by direct femtosecond laser writing.Waveguides with circular section are inscribed z-cut MgO doped stoichiometric lithium tantalate fan-out χ (2) grating structures.The ferroelectric domain-inverted period seamlessly varies from 7.5 to 8.2 µm.Seven individual waveguides step changed periods fabricated.The minimum insertion loss of the is about 0.54 dB at wavelength 1064 nm.Temperature...

<title>Abstract</title> Memristor crossbar arrays (CBAs) based on two-dimensional (2D) materials have emerged as a potential solution to overcome the limitations of energy consumption and latency associated with conventional von Neumann architecture. However, current 2D memristor CBAs encounter specific challenges such limited array size, high sneak path current, lack integration peripheral circuits for hardware compute-in-memory (CIM) systems. In this work, we demonstrate novel CIM system...

The direct femtosecond laser writing has been proved to be one of the most efficient techniques for micro-structuring transparent materials, which can induce refractive index modifications construct waveguide structures. In this work, laser-induced tracks with single-line configuration are formed inside BK7 glass by using inscription pulses 1 MHz repetition rate at wavelength 1030 nm and 515 nm, respectively. high-resolution confocal Raman spectra obtained in track regions investigate...

We report on violet-light generation using the femtosecond-laser written waveguides in periodically poled MgO:LiTaO3 crystal under conditions of third-order quasi-phase matching. Ten parallel depressed cladding are successfully fabricated with different grating periods same sample fan-out χ(2) structures. These exhibit high optical quality minimum insertion loss as low 0.71 dB. Temperature and wavelength tuned second harmonic for demonstrated by a tunable CW Ti sappire laser. Tunable violet...