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Polarization Dynamics of Solid-State Quantum Emitters.

Anand Kumar1,2, Çağlar Samaner3, Chanaprom Cholsuk1,2

  • 1Department of Computer Engineering, School of Computation, Information and Technology, Technical University of Munich, 80333 Munich, Germany.

ACS Nano
|February 9, 2024
PubMed
Summary
This summary is machine-generated.

This study reveals the origin and temporal evolution of dipole orientation in solid-state quantum emitters using hexagonal boron nitride and nanodiamond. Understanding these polarization dynamics improves quantum communication and defect identification.

Keywords:
defect identificationdensity functional theoryelectron irradiationhexagonal boron nitridenanodiamond NV centersquantum emitters arraytemporal polarization dynamics

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Area of Science:

  • Solid-state physics
  • Quantum optics
  • Materials science

Background:

  • Solid-state quantum emitters are crucial for optical quantum technologies.
  • Photon polarization is vital for quantum computation and communication.
  • Current methods for quantifying polarization offer limited insight into dipole properties.

Purpose of the Study:

  • To investigate the origin and temporal evolution of dipole orientation in solid-state quantum emitters.
  • To establish characteristic dipole angles for defect identification and atomic structure analysis.
  • To understand the impact of temporal polarization dynamics on quantum communication performance.

Main Methods:

  • Utilizing single defects in hexagonal boron nitride and nanodiamond as room-temperature single-photon sources.
  • Experimentally determining excitation and emission dipole angles relative to crystal axes.
  • Calculating dipole angles using density functional theory.

Main Results:

  • Identified characteristic dipole angles for specific defects, enabling defect identification and structural analysis.
  • Observed temporal polarization dynamics showing modified linear polarization visibility dependent on excited-state decay time.
  • Linked polarization dynamics to potential excitation of excess charges in the local crystal environment.

Conclusions:

  • The study provides a novel method for defect identification and understanding atomic structures in solid-state quantum emitters.
  • Temporal polarization dynamics offer insights into hidden time-dependent mechanisms affecting emitter performance.
  • Findings can enhance the performance of polarization-sensitive quantum experiments, especially in quantum communication.