Low-Light-Level Cross-Phase-Modulation Based on Stored Light Pulses

Journal Article · Fri Feb 03 04:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.96.0· OSTI ID:20778542

Yongfan, Chen; Changyi, Wang; Shihhao, Wang; Yu, Ite A ^[1]

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1. Department of Physics, National Tsing Hua University, Hsinchu, Taiwan 300 (China)

We experimentally demonstrate a low-light-level cross-phase-modulation (XPM) scheme based on the light-storage technique in laser-cooled {sup 87}Rb atoms. The proposed scheme can achieve a similar phase shift and has the same figure of merit as one using static electromagnetically induced transparency under the constant coupling field. Nevertheless, the phase shift and the energy loss of a probe pulse induced by a signal pulse are neither influenced by the coupling intensity nor by the atomic optical density in the light-storage XPM scheme. This scheme enhances the flexibility of the experiment and makes possible conditional phase shifts on the order of {pi} with single photons.

• OSTI ID: 20778542
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 96; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
COOLING
FLEXIBILITY
LASERS
MODULATION
OPACITY
PERFORMANCE
PHASE SHIFT
PHOTONS
PULSES
RUBIDIUM 87
SIGNALS
VISIBLE RADIATION