Results 31 to 40 of about 78,872 (276)

Plasmonic Generation of Spatiotemporal Optical Vortices

open access: yesPhotonics, 2023
We investigate the transformation of spatiotemporal optical signals using the Kretschmann configuration with an additional dielectric layer, which can be referred to as the “generalized Kretschmann setup”. We demonstrate that in the considered structure,
Artem I. Kashapov   +3 more
doaj   +1 more source

Systems and methods for physiological signal enhancement and biometric extraction using non-invasive optical sensors [PDF]

open access: yes, 2018
A system and method for signal processing to remove unwanted noise components including: (i) wavelength-independent motion artifacts such as tissue, bone and skin effects, and (ii) wavelength-dependent motion artifact/noise components such as venous ...
Nourani, Mehrdad, Yousefi, Rasoul
core   +1 more source

Control of amplitude homogeneity in coherent Ising machines with artificial Zeeman terms

open access: yesCommunications Physics, 2022
Coherent Ising machines represent an optical approach to unconventional computing that fail if inhomogeneity of the analog spins’ amplitude becomes too great.
Yoshitaka Inui   +4 more
doaj   +1 more source

ACE16K: The Third Generation of Mixed-Signal SIMD-CNN ACE Chips Toward VSoCs [PDF]

open access: yes, 2004
Today, with 0.18-μm technologies mature and stable enough for mixed-signal design with a large variety of CMOS compatible optical sensors available and with 0.09-μm technologies knocking at the door of designers, we can face the design of integrated ...
Carmona Galán, Ricardo   +7 more
core   +1 more source

High-threshold fault-tolerant quantum computation with analog quantum error correction [PDF]

open access: yes, 2018
To implement fault-tolerant quantum computation with continuous variables, the Gottesman-Kitaev-Preskill (GKP) qubit has been recognized as an important technological element.
Fujii, Keisuke   +3 more
core   +4 more sources

Optical differentiator based on a trilayer metal-dielectric structure

open access: yesКомпьютерная оптика, 2021
Optical properties of a resonant trilayer metal-dielectric-metal (MDM) structure that consists of an upper metal layer, a dielectric layer, and a metal substrate are investigated.
A.I. Kashapov   +4 more
doaj   +1 more source

Models of optical quantum computing

open access: yesNanophotonics, 2017
I review some work on models of quantum computing, optical implementations of these models, as well as the associated computational power. In particular, we discuss the circuit model and cluster state implementations using quantum optics with various ...
Krovi Hari
doaj   +1 more source

Optical Companding

open access: yes, 2017
We introduce a new nonlinear analog optical computing concept that compresses the signal's dynamic range and realizes non-uniform quantization that reshapes and improves the signal-to-noise ratio in the digital ...
Jalali, Bahram, Jiang, Yunshan
core   +1 more source

A single inverse-designed photonic structure that performs parallel computing

open access: yesNature Communications, 2021
Optical analog computing has so far been mostly limited to solving a single instance of a mathematical problem at a time. Here, the authors show that the linearity of the wave equation allows to solve several problems simultaneously, and demonstrate it ...
Miguel Camacho   +2 more
doaj   +1 more source

Analog computing by Brewster effect

open access: yes, 2016
Optical computing has emerged as a promising candidate for real-time and parallel continuous data processing. Motivated by recent progresses in metamaterial-based analog computing [Science 343, 160 (2014)], we theoretically investigate realization of two-
AbdollahRamezani, Sajjad   +3 more
core   +1 more source

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