van der Waals Materials for Overcoming Fundamental Limitations in Photonic Integrated Circuitry

Nano Letters, Год журнала: 2023, Номер 23(17), С. 8057 - 8064

Опубликована: Авг. 24, 2023

With the advance of on-chip nanophotonics, there is a high demand for high-refractive-index and low-loss materials. Currently, this technology dominated by silicon, but van der Waals (vdW) materials with refractive index can offer very advanced alternative. Still, up to now, it was not clear if optical anisotropy perpendicular layers might be hindering factor development vdW nanophotonics. Here, we studied WS2-based waveguides in terms their properties and, particularly, possible crosstalk distance. Surprisingly, discovered that low direction atomic improves characteristics such devices, mainly due expanding range parameters at which single-mode propagation achieved. Thus, using anisotropic offers new opportunities novel control knobs when designing nanophotonic devices.

Язык: Английский

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Optimal design of graphene-based plasmonic enhanced photodetector using PSO

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Июль 3, 2024

Abstract In this paper, we report a graphene-based plasmonic photodetector optimized using the particle swarm optimization (PSO) algorithm and compatible with complementary metal–oxide–semiconductor (CMOS) technology. The proposed structure is designed to minimize fabrication challenges reduce production costs compared more complex alternatives. Graphene has been used for its unique properties in detection region, titanium nitride (TiN) as CMOS-compatible metal, both aid excitation. Photodetectors have key parameters influenced by multiple independent variables. However, practical constraints prevent thorough adjustment of all variables achieve optimal parameter values, often resulting analysis based on several simplified models. Here optimize these presenting new approach field photodetectors capabilities PSO algorithm. As result, device at wavelength 1550 nm, voltage responsivity 210.6215 V/W, current 3.7213 A/W, ultra-compressed length less than 3 $$\mu {\text{m}}$$ μ m , specific detectivity 2.566× $${10}^{7}$$ 10 7 Jones were obtained. Furthermore, question works under photothermoelectric effect (PTE) zero bias dark current, which ultimately resulted very low noise equivalent power (NEP) 4.5361 $${\text{pW}}/\sqrt{\text{Hz}}$$ pW / Hz .

Язык: Английский

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Low-loss and polarization insensitive 32 × 4 optical switch for ROADM applications

Light Science & Applications, Год журнала: 2024, Номер 13(1)

Опубликована: Апрель 24, 2024

Integrated switches play a crucial role in the development of reconfigurable optical add-drop multiplexers (ROADMs) that have greater flexibility and compactness, ultimately leading to robust single-chip solutions. Despite decades research on with various structures platforms, achieving balance between dense integration, low insertion loss (IL), polarization-dependent (PDL) remains significant challenge. In this paper, we propose demonstrate 32 × 4 switch using high-index doped silica glass (HDSG) for ROADM applications. This is designed route any inputs express ports or drop channels from target add channels. The comprises 188 Mach-Zehnder Interferometer (MZI) type elements, 88 vias 44 bridges, 618 waveguide-waveguide crossings three-dimensional (3D) structures. At 1550 nm, fiber-to-fiber each channel below 2 dB, across C L bands, 3 dB. For input all drop/add at less than 3.5 dB 5 bands. PDLs are 0.3 over band, crosstalk under -50 both

Язык: Английский

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Programmable integrated photonic coherent matrix: Principle, configuring, and applications

Applied Physics Reviews, Год журнала: 2024, Номер 11(1)

Опубликована: Янв. 31, 2024

Every multi-input multi-output linear optical system can be deemed as a matrix multiplier that carries out desired transformation on the input information, such imaging, modulation, and computing. The strong programmability of has been explored proved to able bring more flexibility greater possibilities applications signal processing general digital analog Furthermore, burgeoning integrated photonics with advanced manufacturing light manipulating technology pave way for large-scale reconfigurable photonic coherent matrix. This paper reviews programmable in platform. First, theoretical basis optimizing methods three types (Mach–Zehnder interferometer mesh, multi-plane diffraction, crossbar array) are introduced. Next, we overview configuring method this their processing, neural network, logic operation, recurrent acceleration, quantum computing comprehensively reviewed. Finally, challenges opportunities discussed.

Язык: Английский

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Silicon photonic MEMS switches based on split waveguide crossings

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 2, 2025

The continuous push for high-performance photonic switches is one of the most crucial premises sustainable scaling programmable and reconfigurable circuits a wide spectrum applications. Conventional optical rely on perturbative mechanisms mode coupling or interference, resulting in inherent bottlenecks their switching performance concerning size, power consumption bandwidth. Here we propose realize silicon 2×2 elementary switch based split waveguide crossing (SWX) consisting two halves. propagation direction incident light manipulated to implement OFF/ON states by splitting/combining halves SWX, showing excellent with low excess loss crosstalk over an ultrawide Both 64×64 array Benes topology are fabricated characterized, demonstrating great potential practical scenarios such as interconnect/routing, Lidar spectroscopy, computing, well microwave photonics. This work proposes unique mechanism manipulating brand-new crossing, applications scenarios.

Язык: Английский

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Hybrid photonic integrated circuits for neuromorphic computing [Invited]

Optical Materials Express, Год журнала: 2023, Номер 13(12), С. 3553 - 3553

Опубликована: Ноя. 13, 2023

The burgeoning of artificial intelligence has brought great convenience to people’s lives as large-scale computational models have emerged. Artificial intelligence-related applications, such autonomous driving, medical diagnosis, and speech recognition, experienced remarkable progress in recent years; however, systems require vast amounts data for accurate inference reliable performance, presenting challenges both speed power consumption. Neuromorphic computing based on photonic integrated circuits (PICs) is currently a subject interest achieve high-speed, energy-efficient, low-latency processing alleviate some these challenges. Herein, we present an overview the current platforms available, materials which potential be with PICs further hybrid devices neuromorphic computing.

Язык: Английский

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Advances in Silicon-Based Integrated Lidar

Sensors, Год журнала: 2023, Номер 23(13), С. 5920 - 5920

Опубликована: Июнь 26, 2023

Silicon-based Lidar is an ideal way to reduce the volume of and realize monolithic integration. It removes moving parts in conventional device realizes solid-state beam steering. The advantages low cost, small size, high steering speed have attracted attention many researchers. In order facilitate researchers quickly understand research progress direction, this paper mainly describes silicon-based integrated Lidar, including optical phased array switch continuous frequency-modulated wave Lidar. addition, we also introduced scanning modes working principles other kinds such as Micro-Electro-Mechanical System, mechanical etc., analyzed characteristics Lidars above. Finally, summarized put forward future expectations

Язык: Английский

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Design of Polar Skyrmion‐Based Nanoelectronic Prototype Devices with Phase‐Field Simulations

Advanced Functional Materials, Год журнала: 2024, Номер 34(40)

Опубликована: Июль 29, 2024

Abstract The creation and manipulation of complex topological states like vortex skyrmion in ferroelectric heterostructures have received significant attention recently across various fields, due to the rich physical insights, exotic properties, wide potential applications. Although progress has been made synthesis, local manipulation, dynamic motion these tiny quasi‐particles, design skyrmion‐based nanoelectronic prototype devices is still lacking. Herein, using phase‐field simulations, idea integrate polar skyrmions a PbTiO 3 /SrTiO superlattice system with charged tip/small electrode counter several nanoelectronics devices, such as switch multistate memory. In this design, charge serves “bit”. Phase diagrams display change charges are constructed under different operation conditions tip radius applied potential. By varying electric potential, up ten can be achieved. Asymmetric transitions observed, where greater negative switching routes wi fields along directions. It hoped that work will inspire further research polar‐skyrmion‐based electronic devices.

Язык: Английский

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Fine-Resolution Silicon Photonic Wavelength-Selective Switch Using Hybrid Multimode Racetrack Resonators

Journal of Lightwave Technology, Год журнала: 2024, Номер 42(13), С. 4503 - 4510

Опубликована: Фев. 28, 2024

In this work, we describe a procedure for synthesizing racetrack resonators with large quality factors and apply it to realize multi-channel wavelength-selective switch (WSS) on silicon photonic chip. We first determine the contribution of each component primitive propagation loss in resonator use data develop model frequency response arbitrary order, coupled-racetrack channel dropping filters. design second-order filters based cascade multiple such form 1×7 WSS. find good agreement between our device performance that have ≈ 1 dB drop-port loss, 2 GHz FWHM linewidth, low optical crosstalk due quick filter roll-off 5.3 $/$ GHz. Using control algorithm, show three-channel operation WSS spacing only 10 Owing high factor design, adjacent is measured be < notation="LaTeX">$-$ 25 channels spaced grid. As further demonstration, five seven perform demultiplexing both an 8 These results suggest low-loss fine resolution can realized scalable manner using photonics platform.

Язык: Английский

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Nonvolatile multilevel adjustable optical switch based on plasmonic slot waveguide and GST segmented structure

Optics Express, Год журнала: 2024, Номер 32(9), С. 16548 - 16548

Опубликована: Апрель 2, 2024

Optical computing has gradually demonstrated its efficiency in handling increasingly complex computational demands, attracting widespread attention. switches can effectively control and modulate optical signals, providing flexibility for systems. However, traditional face performance issues such as power consumption, switching speed, compactness, severely limiting the implementation of large-scale photonic integrated circuits neural networks. This paper proposes an innovative design structure a non-volatile multi-level adjustable switch by combining plasmonic slot waveguide with segmented phase-change materials. Modulation light transmission is achieved adjusting phase state Ge

Язык: Английский

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