Abstract
The technology of growing mercury thiogallate crystals (HgGa2S4) is improved and high-quality bulk samples are produced. The basic optical and thermal properties of these crystals are studied. The transmission spectra of mercury thiogallate are measured and its nonlinear characteristics such as the quadratic susceptibility, tuning curves, and the optical-damage resistance are also determined. The specific heat and thermal conductivity of HgGa2S4 are measured. It is concluded that the combined properties of HgGa2S4 crystals can provide for them a leading position among the materials used in nonlinear-optical devices for mid-IR-frequency conversion.
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