Electromagnetically-induced transparency grid in acetylene-filled hollow-core PCF.

Area of Science:

• Atomic, Molecular, and Optical Physics
• Quantum Optics
• Laser Spectroscopy

Background:

• Electromagnetically induced transparency (EIT) is a quantum interference effect.
• Hollow-core photonic crystal fibers (HC-PCFs) offer unique light-matter interaction environments.
• Acetylene (C2H2) provides suitable atomic transitions for EIT studies.

Purpose of the Study:

• To experimentally investigate EIT in acetylene-filled HC-PCFs.
• To analyze EIT using both Lambda-type and V-type atomic configurations.
• To identify and theoretically model decoherence mechanisms affecting EIT.

Main Methods:

• Experimental setup utilizing a tunable laser system.
• Interaction of laser light with acetylene gas within an HC-PCF.
• Spectroscopic analysis of EIT signals.
• Theoretical modeling of decoherence sources.

Main Results:

• Achieved transparency levels as high as ~70%.
• Observed EIT across multiple spectral lines of the R-branch of the C2H2 nu1 + nu3 overtone band.
• Identified fiber-wall collisions and laser frequency jitter as dominant decoherence sources.

Conclusions:

• Demonstrated feasibility of EIT in acetylene-loaded HC-PCFs.
• Highlighted the role of specific decoherence mechanisms in limiting EIT performance.
• Provided insights for optimizing EIT in similar fiber-based systems.