Probing laser-induced dewetting and damage mechanisms in plasmonic thin films for high power beam manipulation

Thejaswi Tumkur; Ruzan Sokhoyan; Elias Anwar; Mikhail A. Noginov; Harry A. Atwater; Selim Elhadj; Eyal Feigenbaum

doi:10.1117/12.2677597

6 October 2023 Probing laser-induced dewetting and damage mechanisms in plasmonic thin films for high power beam manipulation

Thejaswi Tumkur, Ruzan Sokhoyan, Elias Anwar, Mikhail A. Noginov, Harry A. Atwater, Selim Elhadj, Eyal Feigenbaum

Author Affiliations +

Proceedings Volume PC12646, Metamaterials, Metadevices, and Metasystems 2023; PC1264618 (2023) https://doi.org/10.1117/12.2677597
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Conference Poster

Abstract

We investigate the laser damage resistance and optoelectronic properties of thin metallic and semiconducting films used in high power beam steering metasurfaces. We find that gold exhibits the best laser damage resistance, and large absorption losses arising from high carrier concentrations and low mobilities in alternative plasmonic thin films lead to exacerbated degradation and poorer laser damage performance. We will also present results of laser-induced dewetting on thin metallic films deposited on substrates with different optical environments (such as plasmonic films and cavities). We observe that the morphology of dewetting is sensitive to the nonlocal optical environment. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-845919. DE-NA0004007.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Thejaswi Tumkur, Ruzan Sokhoyan, Elias Anwar, Mikhail A. Noginov, Harry A. Atwater, Selim Elhadj, and Eyal Feigenbaum "Probing laser-induced dewetting and damage mechanisms in plasmonic thin films for high power beam manipulation", Proc. SPIE PC12646, Metamaterials, Metadevices, and Metasystems 2023, PC1264618 (6 October 2023); https://doi.org/10.1117/12.2677597

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