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

Energy Bands in Solids01:01

Energy Bands in Solids

2.0K
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
 Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
2.0K
Band Theory02:35

Band Theory

17.2K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
17.2K
The Electromagnetic Spectrum02:37

The Electromagnetic Spectrum

65.4K
The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
65.4K
The Electromagnetic Spectrum01:24

The Electromagnetic Spectrum

33.8K
Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...
33.8K
Dual Nature of Electromagnetic (EM) Radiation01:10

Dual Nature of Electromagnetic (EM) Radiation

3.9K
Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the number of...
3.9K
Energy Carried By Electromagnetic Waves01:22

Energy Carried By Electromagnetic Waves

3.9K
Anyone who has used a microwave oven knows there is energy in electromagnetic waves. Sometimes, this energy is obvious, such as in the summer sun's warmth. At other times, it is subtle, such as the unfelt energy of gamma rays, which can destroy living cells. Electromagnetic waves bring energy into a system through their electric and magnetic fields. These fields can exert forces and move charges in the system and, thus, do work on them. However, there is energy in an electromagnetic wave,...
3.9K

You might also read

Related Articles

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

Sort by
Same author

Sex-based differences in ocular trauma: a systematic review with narrative synthesis.

Frontiers in public health·2026
Same author

Smartphone-Assisted Placido Ring Imaging for K1 Stratification in Keratoconus: A Deep Learning Study.

Diagnostics (Basel, Switzerland)·2026
Same author

Acanthamoeba keratitis: Insights into diagnostic challenges and treatment advances.

Survey of ophthalmology·2026
Same author

Primary anterior cruciate ligament tears are associated with a shift from varus-dominant to neutral and valgus coronal alignment phenotypes.

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA·2026
Same author

Holographic leaky-wave antennas with independently controlled multiple counter-rotating vortex beams.

Scientific reports·2026
Same author

Posterior Segment Pressurization With Intravitreal Balanced Salt Solution to Stabilize Anterior Chamber Gas During Endothelial Keratoplasty.

Cornea·2026

Related Experiment Video

Updated: Feb 5, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

6.7K

Pixelated Metasurface for Dual-Band and Multi-Polarization Electromagnetic Energy Harvesting.

Bagher Ghaderi1, Vahid Nayyeri2, Mohammad Soleimani1

  • 1Antenna and Microwave Research Laboratory and School of Electrical Engineering, Iran University of Science and Technology, Tehran, 1684613114, Iran.

Scientific Reports
|September 7, 2018
PubMed
Summary

This study introduces a dual-band electromagnetic energy harvester that works independently of wave polarization. The novel design achieves high harvesting efficiency at 2.45 GHz and 6 GHz, validated by simulations and experiments.

More Related Videos

Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
08:41

Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution

Published on: August 16, 2012

12.0K
High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
05:11

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition

Published on: June 27, 2025

677

Related Experiment Videos

Last Updated: Feb 5, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

6.7K
Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
08:41

Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution

Published on: August 16, 2012

12.0K
High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
05:11

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition

Published on: June 27, 2025

677

Area of Science:

  • Electromagnetic energy harvesting
  • Metamaterials and metasurfaces
  • Applied electromagnetics

Background:

  • Efficient harvesting of ambient electromagnetic energy is crucial for powering wireless devices.
  • Existing harvesters often suffer from narrow bandwidth and polarization sensitivity.
  • There is a need for robust energy harvesters that operate across multiple frequencies and polarizations.

Purpose of the Study:

  • To propose and design a dual-band and polarization-independent electromagnetic energy harvester.
  • To optimize the harvesting efficiency at 2.45 GHz and 6 GHz.
  • To validate the performance through simulations and experimental measurements.

Main Methods:

  • A pixelated unit cell topology optimization approach was employed.
  • A binary optimization algorithm was used for surface pixelization.
  • Full-wave electromagnetic simulations and anechoic chamber measurements were conducted.

Main Results:

  • A metasurface harvester composed of 9x9 pixelated cells was designed and fabricated.
  • The harvester demonstrated nearly unity absorption efficiency at both 2.45 GHz and 6 GHz.
  • The device showed insensitivity to the polarization of the incident electromagnetic wave.

Conclusions:

  • The proposed metasurface design effectively harvests electromagnetic energy across dual bands and various polarizations.
  • The excellent agreement between simulation and experimental results validates the harvester's performance.
  • This technology holds promise for self-powered wireless systems and the Internet of Things.