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Related Concept Videos

Parallel Resonance01:23

Parallel Resonance

784
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
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Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

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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...
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Oscillations In An LC Circuit01:30

Oscillations In An LC Circuit

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An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
3.5K
Series Resonance01:17

Series Resonance

1.1K
The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
1.1K
Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

841
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
841
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

875
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
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Updated: Apr 20, 2026

Fabrication and Characterization of Superconducting Resonators
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Published on: May 21, 2016

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Frequency comb generation in superconducting resonators.

R P Erickson1, M R Vissers1, M Sandberg1

  • 1National Institute of Standards and Technology, Boulder, Colorado 80305, USA.

Physical Review Letters
|November 15, 2014
PubMed
Summary
This summary is machine-generated.

Superconducting resonators generated broadband frequency combs from 0.5 to 20 GHz. Niobium-titanium nitride films enabled this, showing precise sideband spacing for advanced applications.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Optics
  • Materials Science

Background:

  • Superconducting resonators are crucial for quantum technologies.
  • Generating broadband frequency combs is essential for spectroscopy and communications.

Purpose of the Study:

  • To generate broadband frequency combs in superconducting resonators.
  • To investigate the properties of these combs using novel materials.

Main Methods:

  • Fabrication of superconducting lambda/2 resonators using niobium-titanium nitride thin films.
  • Generation and characterization of frequency combs from 0.5 to 20 GHz at 3 Kelvin.
  • Application of perturbation theory to determine selection rules for frequency emission.

Main Results:

  • Successfully generated frequency combs spanning 0.5 to 20 GHz.
  • Observed comb nucleation as sidebands around pump frequency multiples.
  • Measured sideband spacing accuracy of 1 part in 10^8.
  • Demonstrated coalescence into a continuous comb structure covering multiple octaves.

Conclusions:

  • Niobium-titanium nitride thin films are suitable for creating broadband frequency combs due to their properties.
  • The experimental results align with theoretical predictions for frequency comb generation.
  • The generated combs exhibit high precision and broad spectral coverage.