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Atomic Spin-wave Control and Spin-dependent Kicks with Shaped Subnanosecond Pulses by He, Yizun ;Ji, Lingjing ;Wang, Yuzhuo ;Qiu, Liyang ;Zhao, Jian ;Ma, Yudi ;Huang, Xing ;Wu, Saijun ;Chang, Darrick E. is a Physics and Astronomy article available to read on EtoBox.

What is Atomic Spin-wave Control and Spin-dependent Kicks with Shaped Subnanosecond Pulses about?

The absorption of traveling photons resonant with electric dipole transitions of an atomic gas naturally leads to electric dipole spin-wave excitations. For a number of applications, it would be highly desirable to shape and coherently control the spatial waveform of the spin waves before spontaneous emission can occur. This paper details a recently developed optical control technique to achieve this goal, where counterpropagating, shaped subnanosecond pulses impart subwavelength geometric phases to the spin waves by cyclically driving an auxiliary transition. In particular, we apply this technique to reversibly shift the wave vector of a spin wave on the D2 line of laser-cooled 87 Rb atoms by driving an auxiliary D1 transition with shape-optimized pulses, so as to shut off and recall superradiance on demand. We investigate a spin-dependent momentum transfer during the spin-wave control process, which leads to a transient optical force as large as ∼1hk/ns, and study the limitations to the achieved 70 ∼ 75% spin-wave control efficiency by jointly characterizing the spin-wave control and matter-wave acceleration. Aided by numerical modeling, we project potential future improvements o

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Author

He, Yizun ;Ji, Lingjing ;Wang, Yuzhuo ;Qiu, Liyang ;Zhao, Jian ;Ma, Yudi ;Huang, Xing ;Wu, Saijun ;Chang, Darrick E.

Publisher

American Physical Society (APS)

Published

2020

Language

EN

Field

Physics and Astronomy (Physical Sciences)