3 papers
physics.optics2026
Self-selected phase-matched second harmonic generation in nonlinear optical materials: from phenomenon to applications
Niklas Dömer, Tobias Hehemann, Felix Sauerwein +3
Self-selected phase-matched second harmonic generation is introduced as an all-optical probe of refractive-index dispersion in birefringent nonlinear optical materials. Rather than…
cond-mat.mtrl-sci2024
Long-lived, pulse-induced absorption in solid solutions: the case of three intrinsic defect sites for electron localization with strong coupling
Niklas Dömer, Julian Koelmann, Mira Hesselink +6
Femto-/nanosecond pulse-induced, red and near-infrared absorption is studied in (LNT) solid solutions with the goal to probe the in…
cond-mat.mtrl-sci2024
Small electron polarons bound to interstitial tantalum defects in lithium tantalate
Anton Pfannstiel, Tobias Hehemann, Nils A. Schäfer +8
The absorption features of optically generated, short-lived small bound electron polarons are inspected in congruent lithium tantalate, (LT), in order to address th…