Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Aliasing01:18

Aliasing

209
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
209
Design Example01:23

Design Example

367
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
367
Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

739
A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of...
739
Effective Value of a Periodic Waveform01:07

Effective Value of a Periodic Waveform

664
The concept of effective value, the root mean square (RMS) value, is crucial in understanding electrical circuits and power delivery. This idea emerges from the necessity to measure the effectiveness of a voltage or current source in supplying power to a resistive load.
The effective value of a periodic current represents the direct current (DC) that conveys the same average power to a resistor as the periodic current itself. This concept is crucial when assessing AC circuits. To determine the...
664
Clipper Circuit01:18

Clipper Circuit

542
A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
542
Upsampling01:22

Upsampling

302
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
302

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Creation of a computational space with model-free metasurface neural network.

Nature communications·2026
Same author

All-metallic magnetic Purcell enhancement in a thermally stable room-temperature maser.

Nature communications·2025
Same author

Topological radiation from vortex masers.

Nature communications·2025
Same author

The Association Between Polycystic Ovary Syndrome and Vitamin D Deficiency in Infertile Women: A Case-Control Study.

Health science reports·2025
Same author

Automated FAZ segmentation and diabetic retinopathy classification using OCTA images.

BMC ophthalmology·2025
Same author

Clinical application of anterior segment optical coherence tomography in ocular emergencies: A comprehensive review.

The Journal of international medical research·2025

Related Experiment Video

Updated: Sep 3, 2025

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
09:01

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

8.7K

Parallel wave-based analog computing using metagratings.

Hamid Rajabalipanah1, Ali Momeni2, Mahdi Rahmanzadeh1

  • 1Applied Electromagnetic Laboratory, School of Electrical Engineering, Iran University of Science and Technology, Tehran 1684613114, Iran.

Nanophotonics (Berlin, Germany)
|July 26, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a multi-functional metagrating that engineers both spatial and angular properties of optical signals. This novel platform enables simultaneous analog computing tasks for advanced integrated image processing systems.

Keywords:
analog optical computingmetagratingmetasurface

More Related Videos

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
08:12

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

2.6K
Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

9.4K

Related Experiment Videos

Last Updated: Sep 3, 2025

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
09:01

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

8.7K
A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
08:12

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

2.6K
Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

9.4K

Area of Science:

  • Optics and Photonics
  • Metamaterials
  • Computational Imaging

Background:

  • Wave-based signal processing offers high-speed, low-power advantages.
  • Current metasurfaces primarily manipulate spatial signal content, adhering to traditional Snell's law.
  • There is a need for integrable optical components performing multiple functions.

Purpose of the Study:

  • To propose a multi-functional metagrating capable of modulating both spatial and angular properties of optical signals.
  • To realize symmetric and asymmetric optical transfer functions using high-order space harmonics.
  • To demonstrate parallel analog computing tasks with a single structured surface.

Main Methods:

  • Design of a compound metallic metagrating.
  • Utilizing high-order space harmonics for signal modulation.
  • Development of closed-form expressions for analyzing diffractive modes.

Main Results:

  • The metagrating successfully modulates both spatial and angular signal properties.
  • Demonstrated realization of symmetric and asymmetric optical transfer functions.
  • Validated performance through analysis of phase and amplitude information of diffractive modes.

Conclusions:

  • The proposed metagrating enables simultaneous parallel analog computing, including spatial differentiation.
  • This platform offers a novel approach to optical signal processing.
  • Paves the way for simplified integrated image processing systems.