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Related Experiment Video

Updated: Jul 2, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Slow light beam splitter.

Yanhong Xiao¹, Mason Klein, Michael Hohensee

¹Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.

Physical Review Letters

|September 4, 2008

Summary

This summary is machine-generated.

We developed a slow light beam splitter using atomic motion in a special vapor cell. This device splits light signals, with potential applications in quantum repeaters and optical routing.

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Area of Science:

Quantum optics
Atomic physics
Nanophotonics

Background:

Coherent interactions are crucial for quantum information processing.
Controlling light propagation in atomic systems is challenging.
Atomic motion can potentially mediate optical interactions.

Purpose of the Study:

To demonstrate a novel slow light beam splitter.
To utilize rapid coherence transport via atomic motion.
To explore applications in quantum technologies and optical networking.

Main Methods:

Utilizing a wall-coated atomic vapor cell.
Employing electromagnetically induced transparency (EIT) to write coherence.
Leveraging ballistic atomic motion for coherence transport.
Using antirelaxation wall coatings to preserve coherence.

Main Results:

Demonstrated a functional slow light beam splitter.
Showcased coherence spreading via atomic motion.
Achieved coherence retrieval in two output channels.
Tuned the splitting ratio by adjusting laser power.

Conclusions:

Rapid coherence transport in atomic vapor cells enables beam splitting.
The device functions as a tunable, all-optical beam splitter.
Potential applications include improved quantum repeater performance and reconfigurable optical routers.