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Comparison between optical bistabilities versus power and frequency in a composite cavity-atom system
Optics Express
|April 26, 2017
Summary
Researchers explored a novel "∞"-shape optical bistability using electromagnetically induced transparency (EIT) in a rubidium system. This frequency-dependent behavior offers enhanced sensitivity and dual bistabilities for optical information processing.
Area of Science:
- Atomic Physics
- Quantum Optics
- Nonlinear Optics
Background:
- Electromagnetically induced transparency (EIT) modifies optical properties like absorption and dispersion.
- Optical bistability (OB) is a phenomenon with applications in optical switches and memory.
- Traditional OB is typically observed as a hysteresis loop dependent on optical power.
Purpose of the Study:
- To theoretically and experimentally investigate a novel '∞'-shape optical bistability (OB) dependent on frequency.
- To explore this OB phenomenon in a Λ-shape EIT window within a rubidium atomic ensemble.
- To analyze the relationship between vacuum Rabi splitting and the observed '∞'-shape OB.
Main Methods:
- Utilized changes in optical properties (absorption, dispersion) around resonance in an EIT system.
- Employed a three-mirror optical ring cavity containing a rubidium atomic ensemble.
- Scanned probe and cavity detuning to observe frequency-dependent OB and its characteristics.
Main Results:
- Demonstrated a unique '∞'-shape optical bistability, distinct from traditional power-dependent hysteresis.
- Observed that the '∞'-shape OB exhibits dual bistabilities and increased sensitivity to experimental parameters.
- Established a correlation between vacuum Rabi splitting and the frequency-induced '∞'-shape OB.
Conclusions:
- The frequency-induced '∞'-shape OB offers a new paradigm compared to conventional power-dependent OB.
- This novel bistable behavior shows potential for improved performance in optical logic gates and information processing.
- The findings contribute to advancing nonlinear optical phenomena and their practical applications.
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