期刊
PHYSICAL REVIEW B
卷 79, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.115104
关键词
erbium; excited states; g-factor; ground states; magnetic anisotropy; magnetic field effects; magnetic moments; photon echo; yttrium compounds; Zeeman effect
资金
- Air Force Research Laboratory through AFOSR [F49620-00-1-0314]
- DARPA [MDA972-03-1-0002]
- University of San Francisco
The influence of the anisotropic Zeeman effect on optical decoherence was studied for the 1.54 mu m telecom transition in Er3+:Y2SiO5 using photon echo spectroscopy as a function of applied magnetic field orientation and strength. The decoherence strongly correlates with the Zeeman energy splittings described by the ground- and excited-state g factor variations for all inequivalent Er3+ sites, with the observed decoherence times arising from the combined effects of the magnetic dipole-dipole coupling strength and the ground- and excited-state spin-flip rates, along with the natural lifetime of the upper level. The decoherence time was maximized along a preferred magnetic field orientation that minimized the effects of spectral diffusion and that enabled the measurement of an exceptionally narrow optical resonance in a solid-demonstrating a homogeneous linewidth as narrow as 73 Hz.
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