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Related Concept Videos

Induced Electric Dipoles01:28

Induced Electric Dipoles

A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Fiber-coupled semiconductor waveguides as an efficient optical interface to a single quantum dipole.

Marcelo Davanço1, Kartik Srinivasan

  • 1Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA. mdavanco@nist.gov

Optics Letters
|August 18, 2009
PubMed
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We theoretically show how a quantum dipole can efficiently couple light into an optical fiber using a semiconductor waveguide. This method achieves high light collection efficiency and significantly alters light transmission.

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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Nanophotonics

Background:

  • Quantum emitters are crucial for quantum technologies.
  • Efficiently coupling emitted light into waveguides is a key challenge.
  • Semiconductor waveguides offer strong light confinement.

Purpose of the Study:

  • To theoretically investigate quantum dipole-waveguide interactions.
  • To determine the feasibility of efficient light collection into optical fibers.
  • To explore modifications in light transmission due to dipole coupling.

Main Methods:

  • Theoretical modeling of a single quantum dipole interacting with waveguide modes.
  • Analysis of tight modal confinement and phase-matched evanescent coupling.
  • Simulation of light transmission through the coupled system.

Main Results:

  • Predicted ~70% collection efficiency of dipole emission into a single-mode optical fiber.
  • Demonstrated strong modification of resonant light transmission (>1 order of magnitude).
  • Identified the importance of fiber-waveguide coupler geometry.

Conclusions:

  • Efficient light collection from quantum dipoles into optical fibers is achievable.
  • Semiconductor waveguides provide a viable platform for quantum light manipulation.
  • The dipole-waveguide system offers significant control over light transmission.