Demonstration of site-selective angular-resolved absorption spectroscopy of the ${}^4{I}_{15/2}\to$${}^4{I}_{13/2}$ erbium transition in the monoclinic crystal Y${}_2$SiO${}_5$

Abstract

We study the angular dependence in polarized light of the optical absorption for the Er${}^{3+}$ transition ${}^4{I}_{15/2}\to$${}^4{I}_{13/2}$ in Y${}_2$SiO${}_5$, revealing thus the associated anisotropy and the orientation of the related absorption principal directions in the dielectric plan perpendicular to the monoclinic axis b. The measurements are performed at low temperature. This allows us to isolate the lowest crystal field levels in the ground and excited states. We spectrally resolve and independently characterize the two yttrium substitution sites in the Y${}_2$SiO${}_5$ matrix. The absorption tensor components cannot be unambiguously determined yet while only considering the investigated dielectric plane. Still, measurements remarkably demonstrate that this transition of interest well resolved at low temperature is not only a magnetic-dipole allowed transition but indeed a hybrid electric-magnetic transition.

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• Extending Phenomenological Crystal-Field Methods to $C_1$ Point-Group Symmetry: Characterization of the Optically-Excited Hyperfine Structure of ${}^{167}$Er${}^{3+}$:Y${}_2$SiO${}_5$
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Cited by in corpus (5)

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• Coherent control in the ground and optically excited state of an ensemble of erbium dopants
• Boltzman optical thermometry for cryogenics
• Exploration of optimal hyperfine transitions for spin-wave storage in ${}^{167}$Er${}^{3+}$:Y${}_2$SiO${}_5$
• Incoherent Measurement of Sub-10 kHz Optical Linewidths