Plasmonic color using titanium nitride for robust security devices

Dhruv Fomra; Md Ataul Mamun; Kai Ding; Vitaliy Avrutin; Ümit Özgür; Nathaniel Kinsey

doi:10.1117/12.2568547

20 August 2020 Plasmonic color using titanium nitride for robust security devices

Dhruv Fomra, Md Ataul Mamun, Kai Ding, Vitaliy Avrutin, Ümit Özgür, Nathaniel Kinsey

Proceedings Volume 11462, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII; 114621H (2020) https://doi.org/10.1117/12.2568547
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

The subwavelength nature of the plasmonic resonances, observed in patterned thin metallic films, makes it an attractive choice for use in application such as security features, product branding and data storage and imaging. However, these have largely been limited by the practical issues of cost and robustness arising from the use of gold, silver or aluminum. Here we pattern TiN thin films, a well explored alternative plasmonic material, with sub wavelength apertures, arranged with hexagonal periodicity, which exhibit extraordinary transmission in the visible and near IR spectrum. These TiN structures are shown to withstand different levels of mechanical stresses, while gold doesn’t, making TiN an attractive platform for use as security features.

Conference Presentation

Citation Download Citation

Dhruv Fomra, Md Ataul Mamun, Kai Ding, Vitaliy Avrutin, Ümit Özgür, and Nathaniel Kinsey "Plasmonic color using titanium nitride for robust security devices", Proc. SPIE 11462, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII, 114621H (20 August 2020); https://doi.org/10.1117/12.2568547

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