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Published on: May 30, 2014
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Quantum interference control of perfect photon absorption in a three-level atom-cavity system
Optics Express
|October 7, 2021
Summary
We demonstrate tunable coherent perfect absorption (CPA) in an atom-cavity system using electromagnetically induced transparency (EIT). This method allows for controllable light absorption, transmission, and reflection, paving the way for optical logic devices.
Area of Science:
- Quantum optics
- Atomic physics
- Cavity optomechanics
Background:
- Electromagnetically induced transparency (EIT) enables control over light-matter interactions.
- Coherent perfect absorption (CPA) relies on destructive interference for complete light absorption.
- Atom-cavity systems are crucial for quantum information processing and optical devices.
Purpose of the Study:
- To propose a scheme for controlling coherent photon absorption in a three-level atom-cavity system.
- To investigate the tunability of Coherent Perfect Absorption (CPA) using electromagnetically induced transparency (EIT).
- To explore the potential of the system as a controllable optical switch or logic device.
Main Methods:
- Utilizing a three-level atom-cavity system.
- Implementing electromagnetically induced transparency (EIT) to control photon absorption.
- Analyzing the effects of cavity decay rates and control laser intensity on CPA.
Main Results:
- Demonstrated tunable CPA by controlling quantum interference with a laser.
- Showed that CPA frequency range depends on cavity mirror decay rates.
- Identified that probe field intensity requirements increase with smaller decay rates.
- Established tunability of CPA mode via control laser and relative phase for transmission/reflection.
Conclusions:
- The proposed scheme offers a method for controllable coherent perfect absorption and transmission/reflection.
- The system can function as a tunable absorber or transmitter, applicable to optical logic devices.
- Quantum interference via EIT provides a powerful tool for manipulating light-matter interactions in cavity systems.
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