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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Steady state superradiance of a 2D-spaser array.

Alexander V Dorofeenko1, Alexander A Zyablovsky, Alexey P Vinogradov

  • 1Institute for Theoretical and Applied Electromagnetics RAS, 13 Izhorskaya, Moscow 125412, Russia.

Optics Express
|June 22, 2013
PubMed
Summary
This summary is machine-generated.

A two-dimensional array of spasers (specialized nanoparticles) can synchronize to emit a coherent light beam. This synchronization overcomes near-field interactions, enabling efficient far-field radiation from these typically near-field devices.

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Area of Science:

  • Photonics
  • Plasmonics
  • Quantum Optics

Background:

  • Spasers (surface plasmon amplification by stimulated emission of radiation) are nanoscale light sources primarily generating near-fields.
  • Controlling the collective behavior of multiple spasers is crucial for developing efficient light sources.

Purpose of the Study:

  • To investigate the self-synchronization of a two-dimensional array of incoherently pumped spasers.
  • To demonstrate the potential of synchronized spaser arrays as efficient sources of coherent far-field radiation.

Main Methods:

  • Theoretical modeling of near-field interactions between plasmonic particles in a 2D array.
  • Analysis of mode competition and stability of the synchronized state.
  • Consideration of factors like leaking waves, retardation effects, and disorder.

Main Results:

  • Incoherently pumped spaser arrays can achieve self-synchronization, with dipole moments oscillating in phase and parallel to the array plane.
  • The synchronized state is robust against radiation losses, retardation, and minor structural disorder.
  • The synchronized array generates a narrow beam of coherent light via continuous-wave superradiance.

Conclusions:

  • Spaser arrays can transition from near-field emitters to efficient far-field coherent light sources through strong inter-particle interactions.
  • Self-synchronization provides a pathway to harness spasers for applications requiring directed, coherent light emission.