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Related Concept Videos

Sound Waves: Resonance01:14

Sound Waves: Resonance

2.6K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
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Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

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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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Parallel Resonance01:23

Parallel Resonance

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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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Resonance and Hybrid Structures02:16

Resonance and Hybrid Structures

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According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
16.8K
Concept of Resonance and its Characteristics01:19

Concept of Resonance and its Characteristics

5.0K
If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not...
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Resonance02:52

Resonance

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The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds. 
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Related Experiment Video

Updated: Jun 26, 2025

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Acoustic Resonance Tuning by High-Order Lorentzian Mixing.

Hyeongpin Kim1, Yeolheon Seong1, Kiwon Kwon1

  • 1Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea.

Nano Letters
|May 13, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to tune nanoscale acoustic resonators by mixing high-order Lorentzian responses. This technique offers fine control over resonance properties for improved sensors and quantum devices.

Keywords:
acousto-optic effectson-chip Brillouin scatteringoptomechanicsphotonic integrated circuitssilicon photonics

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Area of Science:

  • Nanoscience and Nanotechnology
  • Acoustics and Optics
  • Quantum Physics

Background:

  • Nanoscale mechanical resonators are crucial for signal processing, sensors, and quantum applications.
  • Ultrahigh-quality (Q) factor acoustic cavities in nanostructures enable strong physical interactions and advanced devices.
  • Controlling resonance properties of these sensitive cavities is challenging due to geometry and material dependence.

Purpose of the Study:

  • To demonstrate a novel method for tuning acoustic resonance properties in nanostructures.
  • To achieve fine-tunability of bandwidth and peak frequency in optomechanical systems.
  • To provide a method for active compensation of environmental fluctuations and fabrication errors.

Main Methods:

  • Utilizing an optomechanical system with weakly coupled phononic-crystal acoustic cavities.
  • Implementing a novel tuning method by mixing high-order Lorentzian responses (second- and third-order).
  • Coherent mixing of distinct resonance orders to manipulate acoustic cavity properties.

Main Results:

  • Achieved coherent mixing of second- and third-order Lorentzian responses.
  • Demonstrated fine-tunability of resonance bandwidth and peak frequency.
  • Tuning range achieved is comparable to the acoustic dissipation rate of the device.

Conclusions:

  • The demonstrated resonance tuning method offers precise control over acoustic cavity properties.
  • This technique is applicable to various Lorentzian-response systems and optomechanics.
  • Enables active compensation for environmental fluctuations and fabrication imperfections in nanoscale devices.