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Summary

This study introduces an active distributed Bragg reflector (DBR) using doped rubidium atoms to control light transmission and speed. Spontaneously generated coherence enables tunable optical properties and light amplification, advancing photonics and laser technology.

Keywords:
Defect modeOptical filterPhotonic crystalSpontaneously generated coherence (SGC)Transfer matrix method (TMM)

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Area of Science:

  • Quantum optics
  • Atomic physics
  • Photonics

Background:

  • Distributed Bragg reflectors (DBRs) are crucial optical components.
  • Controlling light propagation in DBRs is essential for advanced photonic devices.
  • Spontaneously generated coherence (SGC) offers a pathway for manipulating optical properties.

Purpose of the Study:

  • To propose and investigate an active DBR using doped atoms.
  • To demonstrate control over transmission and group velocity of a probe field.
  • To explore the role of SGC in tailoring DBR optical response.

Main Methods:

  • Utilizing three-level rubidium atoms in a ladder configuration.
  • Engineering quantum interference and relative phase between applied fields.
  • Investigating the effect of Rabi-frequency and pumping rate on optical properties.

Main Results:

  • Achieved excellent control over DBR optical properties via SGC.
  • Demonstrated phase-dependent optical response due to SGC.
  • Showcased conversion of probe field absorption to amplification (gain) by tuning parameters.

Conclusions:

  • The proposed active DBR offers precise control over light manipulation.
  • SGC in doped atoms is key to achieving phase-dependent optical responses.
  • Potential applications include all-optical filters, communication systems, and laser cavities.