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The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
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Strong Parametric Coupling between Two Ultracoherent Membrane Modes.

David Hälg1, Thomas Gisler1, Eric C Langman2,3

  • 1Laboratory for Solid State Physics, ETH Zürich, 8093 Zürich, Switzerland.

Physical Review Letters
|March 18, 2022
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Summary
This summary is machine-generated.

Researchers achieved parametric coupling between silicon nitride membrane modes using an oscillating voltage tip. This method enables faster-than-decay energy exchange, crucial for applications like spin sensing.

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Area of Science:

  • Solid State Physics
  • Materials Science
  • Nanotechnology

Background:

  • Silicon nitride membranes are promising for resonant sensing applications.
  • Controlling energy exchange between mechanical modes is key for advanced functionalities.

Purpose of the Study:

  • To demonstrate parametric coupling between two modes of a silicon nitride membrane.
  • To explore a novel method for rapid energy transfer between mechanical modes.

Main Methods:

  • Utilizing a sharp metal tip positioned near the silicon nitride membrane surface (within 100s of nm).
  • Applying an oscillating voltage to the tip at a frequency matching the mode frequency difference.

Main Results:

  • Achieved parametric coupling, leading to periodic energy exchange between the two modes.
  • Observed energy exchange occurring faster than the natural decay rate of the modes.

Conclusions:

  • The demonstrated technique offers a flexible approach for rapid state control and energy transfer in membrane resonators.
  • This work represents a significant advancement towards parametric spin sensing experiments using membrane resonators.