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Gigahertz-bandwidth optical memory in Pr3+:Y2SiO5.
Optics Letters
|June 15, 2021
Summary
Researchers demonstrated a broadband atomic frequency comb (AFC) rephasing protocol using a Pr3+:Y2SiO5 crystal. This method achieved 10% efficiency for storing broadband light pulses, paving the way for quantum information applications.
Area of Science:
- Quantum optics
- Solid-state quantum memory
- Atomic frequency comb (AFC) technology
Background:
- Broadband light pulse storage is crucial for quantum information processing.
- Atomic frequency comb (AFC) protocols enable temporal manipulation of light.
- Pr3+-doped crystals offer suitable optical properties for quantum memory applications.
Purpose of the Study:
- To experimentally implement and characterize a broadband AFC rephasing protocol.
- To explore a novel regime matching photonic bandwidth to material inhomogeneous broadening.
- To optimize AFC preparation parameters for enhanced storage efficiency and temporal mode capacity.
Main Methods:
- Utilized a cryogenically cooled Pr3+:Y2SiO5 crystal.
- Implemented a broadband AFC rephasing protocol with input pulses matching material broadening (~5 GHz).
- Investigated various AFC preparation parameters to optimize performance.
Main Results:
- Achieved a maximum storage efficiency of 10% after a 12.5 ns rephasing time.
- Demonstrated the storage of up to 12 rephased temporal modes with a suboptimal AFC.
- Successfully operated in a regime where photonic bandwidth exceeded hyperfine splitting (~10 MHz).
Conclusions:
- The study presents a novel broadband AFC implementation for light pulse storage.
- The results highlight the potential of Pr3+:Y2SiO5 for high-bandwidth quantum memory.
- Optimized AFC protocols can significantly enhance storage efficiency and temporal mode capacity.
