Photoactive Pb3+ host lattice ions in photorefractive Pb5Ge3O11 characterized by ODMR and EPR.

M Pape; HJ Reyher; N Hausfeld; S Mendricks

doi:10.1364/APMED.1999.MC7

Advances in Photorefractive Materials, Effects and Devices
Trends in Optics and Photonics (Optica Publishing Group, 1999),
paper MC7
•https://doi.org/10.1364/APMED.1999.MC7

Photoactive Pb³⁺ host lattice ions in photorefractive Pb₅Ge₃O₁₁ characterized by ODMR and EPR.

M Pape, HJ Reyher, N Hausfeld, and S Mendricks

Advances in Photorefractive Materials, Effects and Devices 1999

Elsinore Denmark
ISBN: 1-55752-606-0

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M. Pape, H. Reyher, N. Hausfeld, and S. Mendricks, "Photoactive Pb3+ host lattice ions in photorefractive Pb5Ge3O11 characterized by ODMR and EPR.," in Advances in Photorefractive Materials, Effects and Devices, P. Andersen, P. Johansen, H. Pedersen, P. Petersen, and M. Saffman, eds., Vol. 27 of Trends in Optics and Photonics (Optica Publishing Group, 1999), paper MC7.

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Abstract

In photorefractive Pb₅Ge₃O₁₁ and (Pb₀_.₈Ba_0.02)₅Ge₃O₁₁ crystals, Pb²⁺ host lattice ions can be recharged by visible light to Pb³⁺. The magnetic and structural properties of this hole trapping center, metastable at low temperatures, is characterized by EPR. This information is correlated with optical properties by optically detected magnetic resonance (ODMR) via the magnetic circular dichroism (MCD) of absorption. A pronounced photochromic effect can also be associated with this charge trapping center. Several observations give evidence that this Pb³⁺ center is involved in the holographic recharging effects in lead germanate.

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