Superradiant control ofγ-ray propagation by vibrating nuclear arrays
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The collective nature of light interactions with atomic and nuclear ensembles yields the fascinating phenomena of superradiance and radiation trapping. We study the interaction of γ rays with a coherently vibrating periodic array of two-level nuclei. Such nuclear motion can be generated, e.g., in ionic crystals illuminated by a strong driving optical laser field. We find that deflection of the incident γ beam into the Bragg angle can be switched on and off by nuclear vibrations on a superradiant time scale determined by the collective nuclear frequency Ωa, which is of the order of terahertz. Namely, if the incident γ wave is detuned from the nuclear transition by frequency ΔΩa it passes through the static nuclear array. However, if the nuclei vibrate with frequency Δ then parametric resonance can yield energy transfer into the Bragg deflected beam on the superradiant time scale, which can be used for fast control of γ rays. © 2013 American Physical Society.
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Zhang, X., & Svidzinsky, A. A.
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Zhang, Xiwen||Svidzinsky, Anatoly A
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7 Affordable And Clean Energy
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https://hdl.handle.net/1969.1/180964
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http://dx.doi.org/10.1103/PhysRevA.88.033854
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7 Affordable and Clean Energy