scholarly journals Broadband Active Control of Transverse Scattering from All-Dielectric Nanoparticle

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 920
Author(s):  
Huiwen Yu ◽  
Hongjia Zhu ◽  
Jinyang Li ◽  
Zhaolong Cao ◽  
Huanjun Chen
Keyword(s):  
Optical Communications ◽  
Electromagnetic Scattering ◽  
Coherent Control ◽  
Wave Excitation ◽  
Coherent Light ◽  
Practical Applications ◽  
Fundamental Limitations ◽  
Dielectric Nanoparticle ◽  
On Chip ◽  
Transverse Scattering

Steering electromagnetic scattering by subwavelength objects is usually accompanied by the excitation of electric and magnetic modes. The Kerker effect, which relies on the precise overlapping between electric and magnetic multipoles, is a potential approach to address this challenge. However, fundamental limitations on the reconfigurability and tunability challenge their future implementation in practical applications. Here, we demonstrate a design approach by applying coherent control to a silicon nanodisk. By utilizing an experimentally feasible two-wave excitation, this coherent light-by-light control enables a highly reconfigurable, broadband, and tunable transverse scattering, extending the feasibility of unidirectional scattering in various practical scenarios, including on-chip integrations and optical communications.

Multi-channeled vortex beam switch with moiré metasurfaces

2021 ◽  
Author(s):  
Cheng Cui ◽  
Zheng Liu ◽  
Bin Hu ◽  
Yurong Jiang ◽  
Juan Liu
Keyword(s):  
Functional Diversity ◽  
Optical Communications ◽  
Topological Charge ◽  
Signal Transmission ◽  
Polarized Light ◽  
Vortex Beam ◽  
Practical Applications ◽  
Linearly Polarized ◽  
Vortex Beams ◽  
Topological Charges

Abstract Tunable metasurface devices are considered to be an important link for metasurfaces to practical applications due to their functional diversity and high adaptability to the application scenarios. Metasurfaces have unique value in the generation of vortex beams because they can realize light wavefronts of any shape. In recent years, several vortex beam generators using metasurfaces have been proposed. However, the topological charge generally lacks tunability, which reduces the scope of their applications. Here, we propose an active tunable multi-channeled vortex beam switch based on a moiré structure composed of two cascaded dielectric metasurfaces. The simulation results show that when linearly polarized light with a wavelength of 810 nm is incident, the topological charge from -6 to +6 can be continuously generated by relatively rotating the two metasurfaces. Meanwhile, different topological charges are deflected to different spatial channels, realizing the function of multi-channeled signal transmission. We also study the efficiency and broadband performance of the structure. The proposed multi-channeled separation method of vortex beams that can actively tune topological charges paves the way for the compactness and functional diversity of devices in the fields of optical communications, biomedicine, and optoelectronics.

Fifty years of Electronic Hardware Implementations of First and Higher Order Neural Networks

2010 ◽  
pp. 269-285 ◽  
Author(s):  
David R. Selviah ◽  
Janti Shawash
Keyword(s):  
Neural Networks ◽  
Real Time ◽  
High Speed ◽  
Higher Order ◽  
Low Latency ◽  
Real Time Control ◽  
Practical Applications ◽  
Field Programmable ◽  
On Chip ◽  
Electronic Hardware

This chapter celebrates 50 years of first and higher order neural network (HONN) implementations in terms of the physical layout and structure of electronic hardware, which offers high speed, low latency, compact, low cost, low power, mass produced systems. Low latency is essential for practical applications in real time control for which software implementations running on CPUs are too slow. The literature review chapter traces the chronological development of electronic neural networks (ENN) discussing selected papers in detail from analog electronic hardware, through probabilistic RAM, generalizing RAM, custom silicon Very Large Scale Integrated (VLSI) circuit, Neuromorphic chips, pulse stream interconnected neurons to Application Specific Integrated circuits (ASICs) and Zero Instruction Set Chips (ZISCs). Reconfigurable Field Programmable Gate Arrays (FPGAs) are given particular attention as the most recent generation incorporate Digital Signal Processing (DSP) units to provide full System on Chip (SoC) capability offering the possibility of real-time, on-line and on-chip learning.

scholarly journals Integrated Vivaldi plasmonic antenna for wireless on-chip optical communications

2017 ◽  
Vol 25 (14) ◽  
pp. 16214 ◽  
Author(s):  
Gaetano Bellanca ◽  
Giovanna Calò ◽  
Ali Emre Kaplan ◽  
Paolo Bassi ◽  
Vincenzo Petruzzelli
Keyword(s):  
Optical Communications ◽  
On Chip

Scalable on-chip generation and coherent control of complex optical quantum states

2018 ◽  
Author(s):  
Piotr Roztocki ◽  
Michael Kues ◽  
Christian Reimer ◽  
Luis Romero Cortés ◽  
Stefania Sciara ◽  
...  
Keyword(s):  
Coherent Control ◽  
Quantum States ◽  
On Chip

Researching of Seismic Wave Excitation Technology

2014 ◽  
Vol 926-930 ◽  
pp. 885-888
Author(s):  
Xu Fang Zhu ◽  
Bing Yan
Keyword(s):  
Seismic Wave ◽  
Mineral Exploration ◽  
Wave Excitation ◽  
Practical Applications ◽  
Advantages And Disadvantages ◽  
Wave Technique

Currently, the seismic wave technique increasingly used in mineral exploration, detecting buried targets etc. Conventional seismic wave excitation technique has many drawbacks. This paper summarizes the advantages and disadvantages of various seismic wave excitation technology, practical applications may need to select the appropriate source technology in order to stimulate better results.

The Chemistry of Single-Walled Nanotubes

MRS Bulletin ◽  
2009 ◽  
Vol 34 (12) ◽  
pp. 950-961 ◽  
Author(s):  
Michael S. Strano ◽  
Ardemis A. Boghossian ◽  
Woo-Jae Kim ◽  
Paul W. Barone ◽  
Esther S. Jeng ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Electrical Transport ◽  
Near Infrared ◽  
Scientific Discovery ◽  
Electronic Devices ◽  
Fluorescent Sensors ◽  
Infrared Light ◽  
Practical Applications ◽  
On Chip ◽  
Walled Carbon Nanotubes

AbstractThe unique structural, electronic, and mechanical properties of single-walled carbon nanotubes (SWNTs) have opened the doors to developments that push the limits of science. These advancements not only further scientific discovery, but also result in the development of everyday practical applications. These applications vary from singlemolecule sensors to nano-scaled transistors to multi-modal biosensors. This article focuses on three distinct developments made as a result of recent advances in spectroscopy of SWNTs. The first system examines the use of SWNTs for molecular detection using near-infrared light to produce tunable fluorescent sensors that are highly photostable. The second system examines the use of a 4-hydroxybenzene diazonium reagent to sort SWNTs based on electronic structure to create on-chip modifications of nano-electronic devices. The third system characterizes nanotube networks for such applications as flexible electronics, exploring the irreversible binding of adsorbates onto nanotube networks using electrical transport and Raman spectroscopy.

scholarly journals Fundamental optical linewidth of soliton microcombs

2021 ◽  
Author(s):  
Fuchuan Lei ◽  
Zhichao Ye ◽  
Attila Fülöp ◽  
Victor Torres-Company
Keyword(s):  
Frequency Shift ◽  
Phase Noise ◽  
Phase Coherence ◽  
Pump Laser ◽  
Frequency Noise ◽  
Coherent Light ◽  
Optical Phase ◽  
New Strategy ◽  
Precision Metrology ◽  
On Chip

Abstract Soliton microcombs provide a versatile platform for realizing fundamental studies and technological applications. To be utilized as frequency rulers for precision metrology, soliton microcombs must display broadband phase coherence, a parameter characterized by the optical phase or frequency noise of the comb lines and their corresponding optical linewidths. Here, we analyze the optical phase-noise dynamics in soliton microcombs and show that, because of the Raman self-frequency shift, the fundamental linewidth of some of the comb lines can, surprisingly, be narrower than the linewidth of the pump laser. This work elucidates information about the ultimate limits in phase coherence of soliton microcombs and illustrates a new strategy for the generation of spectrally coherent light on chip.

scholarly journals Computing Sorted Subsets for Data Processing in Communicating Software/Hardware Control Systems

2015 ◽  
Vol 11 (1) ◽  
pp. 126 ◽  
Author(s):  
Valery Sklyarov ◽  
Iouliia Skliarova ◽  
Artjom Rjabov ◽  
Alexander Sudnitson
Keyword(s):  
High Performance ◽  
Large Data ◽  
Computation Method ◽  
Data Sets ◽  
Processing Unit ◽  
Programmable Logic ◽  
Practical Applications ◽  
Sorting Networks ◽  
Hardware System ◽  
On Chip

Computing and filtering sorted subsets are frequently required in statistical data manipulation and control applications. The main objective is to extract subsets from large data sets in accordance with some criteria, for example, with the maximum and/or the minimum values in the entire set or within the predefined constraints. The paper suggests a new computation method enabling the indicated above problem to be solved in all programmable systems-on-chip from the Xilinx Zynq family that combine a dual-core Cortex-A9 processing unit and programmable logic linked by high-performance interfaces. The method involves highly parallel sorting networks and run-time filtering. The computations are done in communicating software, running in the processing unit, and hardware, implemented in the programmable logic. Practical applications of the proposed technique are also shown. The results of implementation and experiments clearly demonstrate significant speed-up of the developed software/hardware system comparing to alternative software implementations.

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