As part of the investigations, quantum nanolaminates (QNLs) were produced from TiO2, Nb2O5, and ZrO2 using IBS which are presented here. Complex layer systems, such as edge filters or polarizers, are produced using a system control specially adapted for such a large number of layers and the complete automation of the coating process. With these coatings, the focus was also on exploiting the blue-shift caused by quantization. Subsequent investigations are intended to demonstrate their applicability to other areas of optics production. The applications range from high laser damage thresholds to low mechanical losses for the mirrors of gravitational wave detectors or optical clocks.
At sufficiently high intensities the electronic nonlinear behavior of optical materials dominates the classical linear phenomena. Through laser calorimetric absorption (LCA) measurements this behavior has been characterized and an increase in absorption of over one order of magnitude has been observed. Quantum nanolaminates (QNLs) are uniquely suited to investigating these phenomena as it is possible to tune the refractive index and bandgap. The absorption and electronic behavior of QNLs deposited with Titania and Niobia in conjunction with Silica were investigated using LCA. The impact of defects on the measurements are also discussed.
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