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Online and in situ investigation of electron irradiation induced optical absorption in ZnGeP2 single crystals

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  • Online and in situ investigation of electron irradiation induced optical absorption in ZnGeP2 single crystals
Author
Charlotte Vernozy
Antonino Alessi
Olivier Cavani
Audrey Courpron
Johan Petit
Valérie Véniard
Keywords
paper
Abstract
In the present study, the absorbance induced in Zinc germanium diphosphide, ZnGeP2 (ZGP) crystals and new Sn-doped ZGP crystals has been investigated under irradiation with high energy electrons. Online and in situ experiments were performed in the range 720–1100 nm. The spectra of the induced absorbance are constituted by a “tail” and the maximum appears to be located at wavelengths lower than those of the investigated spectral range. A fraction of the induced absorbance disappears within one minute after the electron beam is switched off, revealing the presence of metastable effects. A low and a high fluence contribution to the induced absorbance have been observed at 800 nm. The first reaches a limit value and seems to be affected by the Sn doping or by the absence of post-growth annealing, while the high fluence contribution does not feature a saturation in the investigated range and does not depend on the sample type.
Year of Publication
2025
Journal
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Volume
566
Number of Pages
165758
ISSN Number
0168-583X
URL
https://www.sciencedirect.com/science/article/pii/S0168583X2500148X
DOI
https://doi.org/10.1016/j.nimb.2025.165758
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