“School of Nano-Sciences”
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| Paper IPM / Nano-Sciences / 18140 |
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This study explores how light is absorbed and amplified in a three-level atomic $\Lambda$ system using a weak probe field and a special kind of laser beam called an optical vortex beam. The system includes both spontaneously generated coherence and an incoherent pump. Because the probe and vortex fields have different phase distributions, the atomic system's optical response changes across space.
By adjusting settings like the vortex beam's orbital angular momentum and the detuning of optical transitions, researchers can flexibly control how the system reacts in different directions (azimuthal modulation). The vortex beam also influences how energy is distributed in the upper state of the atoms.
This method provides a precise way to shape optical behavior, offering potential improvements for optical communication, quantum technologies, and sensing applications.
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