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arXiv · 0905.3435

Creating traveling waves from standing waves from the gyrotropic paramagnetic properties of Fe$^{3+}$ ions in a high-Q whispering gallery mode sapphire resonator

Karim Benmessai·Michael Edmund Tobar·Nicholas Bazin·Pierre-Yves Bourgeois·Yann Kersale·Vincent Giordano
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Abstract

We report observations of the gyrotropic change in magnetic susceptibility of the Fe$^{3+}$ electron paramagnetic resonance at 12.037GHz (between spin states $|1/2>$ and $|3/2>$) in sapphire with respect to applied magnetic field. Measurements were made by observing the response of the high-Q Whispering Gallery doublet (WGH$_{\pm17,0,0}$) in a Hemex sapphire resonator cooled to 5 K. The doublets initially existed as standing waves at zero field and were transformed to traveling waves due to the gyrotropic response.

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Karim Benmessai, Michael Edmund Tobar, Nicholas Bazin, Pierre-Yves Bourgeois, Yann Kersale, Vincent Giordano. 2009-05-21. Creating traveling waves from standing waves from the gyrotropic paramagnetic properties of Fe$^{3+}$ ions in a high-Q whispering gallery mode sapphire resonator. https://doi.org/10.1103/physrevb.79.174432

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