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Area of Science:

  • Condensed matter physics
  • Metamaterials science
  • Quantum device applications

Background:

  • Metamaterials offer unique light-interaction properties not found in nature.
  • Artificial meta-atoms, often electronic or plasmonic, form these engineered media.
  • In situ control of metamaterial properties is a key research objective.

Purpose of the Study:

  • To demonstrate superconducting quantum interference devices (SQUIDs) as switchable meta-atoms.
  • To investigate the nonlinear dynamics and magnetic susceptibility of SQUID meta-atoms.
  • To explore the potential for all-optical switching in metamaterials.

Main Methods:

  • Utilizing superconducting quantum interference devices as meta-atoms.
  • Investigating nonlinear dynamics and magnetic susceptibility in the microwave domain.
  • Applying nanosecond-long pulses for state switching.

Main Results:

  • SQUIDs exhibit intrinsic nonlinearity, leading to multiple stable dynamic states.
  • These states correspond to distinct values and signs of magnetic susceptibility.
  • All-optical switching between states was achieved using pulsed signals.

Conclusions:

  • Superconducting quantum interference devices can function as fast, switchable meta-atoms.
  • Metamaterial multistability offers pathways for novel optical switching applications.
  • The findings open possibilities for nonlinear meta-atoms in diverse applications.