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Area of Science:

  • Solid-state photonics
  • Quantum optics
  • 2D materials

Background:

  • Quantum confinement is crucial for discretizing particle motion, observed in various quantum systems.
  • Existing exciton confinement methods in solid-state photonics lack precise control, hindering scalable quantum systems.

Purpose of the Study:

  • To demonstrate electrically controlled quantum confinement of neutral excitons in 2D semiconductors.
  • To overcome limitations of material modulation for exciton trapping potentials.

Main Methods:

  • Utilized gate-defined in-plane electric fields in a lateral p-i-n junction.
  • Leveraged interactions between excitons and free charges for confinement.

Main Results:

  • Achieved exciton confinement below 10 nm.
  • Observed quantized excitonic motion as discrete voltage-dependent optical states.
  • Demonstrated strong modification of exciton wave functions by confining potentials.

Conclusions:

  • Developed a technique for electrical quantum confinement of excitons in 2D materials.
  • Opens pathways for scalable arrays of single-photon sources.
  • Enables advancements in strongly correlated photonic phases and on-chip quantum information processing.