Deng, L.
and Payne, M.
(2007),
Gain-Asisted Large and Rapidly-Responding Kerr Effect Using a Room-Temperature Active Raman Gain Medium, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.98.253902
(Accessed March 6, 2025)
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Gain-Asisted Large and Rapidly-Responding Kerr Effect Using a Room-Temperature Active Raman Gain Medium
Published
Author(s)
, Marvin G. Payne
Abstract
A four-level $N$-scheme with a two-mode active-Raman-gain-core is investigated for large and rapidly-responding Kerr effect enhancement at room-temperature. The new scheme is fundamentally different from electromagnetically-induced-transparency (EIT)-based ultra-slow-wave Kerr effect enhancement scheme. It eliminates the requirement of group velocity matching and multi-specie medium. It also eliminates significant probe field attenuation or distortion associated with weakly-driven EIT-based schemes. We show that a probe field can acquire a large, frequency tunable, gain-assisted nonlinear phase shift and yet travel with gain-assisted {\em superluminal} propagation velocity. This raises the possibility of rapidly-responding, frequency tunable nonlinear phase switching and phase gates for information science.Citation
Physical Review Letters
Volume
98
Issue
25
Pub Type
Journals
Download Paper
Keywords
nonlinear optics, superluminal nonlinear phase gate
Citation
Issues
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Created June 22, 2007, Updated November 10, 2018