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Azimuthally dependent absorption and gain in an atomic system with spontaneously generated coherence controlled by an
Viačeslav Kudriašov1, Teodora Kirova2, Seyyed Hossein Asadpour3
1Institute of Theoretical Physics and Astronomy, Vilnius University, 10257, Vilnius, Lithuania.
Scientific Reports
|April 15, 2025
Summary
This study shows how optical vortex beams control atomic system responses. Researchers achieved flexible control over light absorption and gain by manipulating vortex beam properties.
Area of Science:
- Atomic physics
- Quantum optics
Background:
- Spontaneous coherence in 3-level atomic systems influences optical properties.
- Optical vortex beams offer unique phase control capabilities.
Purpose of the Study:
- To investigate the spatially dependent absorption and gain in a 3-level atomic system.
- To explore the use of optical vortex beams as a control field for manipulating optical responses.
Main Methods:
- Utilizing a 3-level atomic Λ-system with spontaneously generated coherence.
- Employing an optical vortex beam with adjustable orbital angular momentum as a control field.
- Analyzing the modulation of optical response by the inhomogeneous phase distribution between probe and vortex fields.
Main Results:
- The transverse distribution of optical response is modulated by the phase difference between probe and vortex fields.
- Azimuthal modulation in the transverse plane is controllable via vortex parameters like orbital angular momentum and detuning.
- Vortex parameters influence the population distribution of the atomic system's upper state.
Conclusions:
- Precise control over optical response characteristics is achievable using optical vortex beams.
- This method has potential applications in optical information and communication, quantum devices, and sensing.
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