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

Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

7.5K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
7.5K
Joule-Thomson Effect01:21

Joule-Thomson Effect

10.2K
The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases.
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
10.2K
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

4.8K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
4.8K
Carrier Generation and Recombination01:22

Carrier Generation and Recombination

1.4K
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
1.4K
Electromagnetic Waves in Matter01:30

Electromagnetic Waves in Matter

4.1K
Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the medium, μ.
Furthermore,...
4.1K
Electromagnetic Waves01:30

Electromagnetic Waves

11.7K
James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws...
11.7K

You might also read

Related Articles

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

Sort by
Same author

Supercurrent time division multiplexing with solid-state integrated hybrid superconducting electronics.

Nature communications·2025
Same author

Author Correction: A gate tunable transmon qubit in planar Ge.

Nature communications·2024
Same author

A gate tunable transmon qubit in planar Ge.

Nature communications·2024
Same author

Superconducting spintronic heat engine.

Nature communications·2024
Same author

Bipolar thermoelectric Josephson engine.

Nature nanotechnology·2022
Same author

Molecular Aspects of the Interaction with Gram-Negative and Gram-Positive Bacteria of Hydrothermal Carbon Nanoparticles Associated with Bac8c<sup>2,5Leu</sup> Antimicrobial Peptide.

ACS omega·2022
Same journal

Sub1 contributes to heart failure with preserved ejection fraction driven by aging in mice.

Nature communications·2026
Same journal

The BRCA1-A complex restricts replication fork reversal-dependent DNA repair in ATM deficient cells.

Nature communications·2026
Same journal

Signaling downstream of tumor-stroma interaction regulates mucinous colorectal adenocarcinoma apicobasal polarity.

Nature communications·2026
Same journal

Click-polymerized polyenamine membranes for efficient lithium extraction.

Nature communications·2026
Same journal

Joint trajectories of brain atrophy, white matter hyperintensities and cognition quantify brain maintenance.

Nature communications·2026
Same journal

Proton shuttling at electrochemical interfaces under alkaline hydrogen evolution.

Nature communications·2026
See all related articles

Related Experiment Video

Updated: Feb 22, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.8K

Coherent microwave comb generation via the Josephson effect.

Angelo Greco1, Xavier Ballu2, Francesco Giazotto2

  • 1NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa, Italy. angelo.greco@nano.cnr.it.

Nature Communications
|February 20, 2026
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate a novel microwave frequency comb generator using superconducting circuits. This on-chip device leverages the ac Josephson effect for precise gigahertz to terahertz frequency generation, paving the way for quantum technologies.

More Related Videos

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

17.6K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

13.3K

Related Experiment Videos

Last Updated: Feb 22, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.8K
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

17.6K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

13.3K

Area of Science:

  • Solid-state physics
  • Quantum optics
  • Microwave engineering

Background:

  • Optical frequency combs are precise measurement tools.
  • Superconducting circuits offer a low-dissipation platform for frequency comb generation.
  • On-chip integration of frequency combs is desirable for advanced applications.

Purpose of the Study:

  • To demonstrate coherent microwave frequency comb generation using superconducting circuits.
  • To explore the potential of the ac Josephson effect for on-chip comb emitters.
  • To assess the performance and scalability of superconducting frequency combs.

Main Methods:

  • Utilized a superconducting quantum interference device (SQUID).
  • Applied a time-dependent magnetic drive to generate periodic voltage pulses.
  • Analyzed the generated voltage pulses in the frequency domain to characterize the comb properties.

Main Results:

  • Achieved coherent microwave frequency comb generation with dozens of spectral modes (up to mode 46).
  • Observed emitted power ranging from -170 dBm to -130 dBm per harmonic.
  • Demonstrated a 40 dB dynamic range within a 4-8 GHz bandwidth.
  • Fabricated a micrometer-scale device with minimal dissipation.

Conclusions:

  • Superconducting circuits provide a viable platform for on-chip microwave frequency comb generation.
  • The ac Josephson effect is a key mechanism for creating these combs.
  • The developed technology holds promise for integration with cryogenic electronics and quantum technologies.