Abstract
Measurements of the refractive indices and the full set of longitudinal acousto-optical figures of merit in an orthorhombic single-crystal indium iodide (InI) were carried out. The high acousto-optic characteristics (${{\boldsymbol M}_2}$ up to $1100 \times {10^{ - 15}}\,\,{{\rm s}^3}\,{\rm kg}^{ - 1}$) and strong optical anisotropy ($\Delta {n} = 0.47$) make it possible to design various types of high-performance acousto-optic devices of the middle and far-infrared spectral range. In combination with a wide transparency range ($0.62 - 51\,\,{\unicode{x00B5}\rm m}$), the obtained characteristics make the crystal extremely promising in comparison with most existing analogs.
© 2020 Optical Society of America
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