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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
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Angular emission characteristics of quantum cascade spiral microlasers.

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Summary

Ray and wave simulations of spiral optical microcavities match experimental data. Selective pumping can control quantum cascade spiral microlaser emission directionality.

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Area of Science:

  • Optics and Photonics
  • Quantum Electronics
  • Computational Physics

Background:

  • Spiral-shaped optical microcavities offer unique light confinement properties.
  • Quantum cascade lasers (QCLs) are semiconductor devices emitting in the mid-infrared.
  • Understanding emission characteristics is crucial for laser design and application.

Purpose of the Study:

  • To simulate and analyze the angular emission patterns of passive and active spiral optical microcavities.
  • To compare simulation results with experimental data from mid-infrared quantum cascade spiral microlasers.
  • To investigate methods for controlling the directionality of laser emission.

Main Methods:

  • Performing ray and wave optical simulations for spiral microcavities.
  • Utilizing the Schr\
  • dinger-Bloch model for active cavity simulations.
  • Comparing simulation outputs with experimental far-field emission data.

Main Results:

  • Both ray and wave simulations accurately predict the experimentally observed multi-directional far-field emission patterns.
  • Simulations show that uniform pumping and TM-polarized light result in complex emission characteristics.
  • Active cavity simulations suggest selective pumping near the resonator boundary can achieve unidirectional emission.

Conclusions:

  • Ray and wave simulations are reliable tools for studying spiral microcavity emission.
  • Quantum cascade spiral microlasers exhibit rich angular emission patterns under uniform pumping.
  • Tailored pumping strategies can enable control over laser emission directionality, enhancing device functionality.