J. Eur. Opt. Society-Rapid Publ. 22, 15( 2026) 147
Author contribution statement
Conceptualization, C. Falldorf and B. Gutierrez; Specimen preparation, B. Gutierrez; Experimental measurements, B. Gutierrez and C. Falldorf; Evaluation and processing of experimental data, B. Gutierrez; Assessment of results, B. Gutierrez, C. Falldorf; Visualization, B. Gutierrez; Writing – Original Draft Preparation, C. Falldorf, B. Gutierrez, R. B. Bergmann; Supervision, R. B. Bergmann; All authors discussed the results and contributed to the final manuscript.
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