Architecting the columnar morphology of sculptured thin films for polarization-universal bandgaps

Ricardo A. Fiallo; Mark W. Horn; Akhlesh Lakhtakia

doi:10.1117/12.2646145

31 January 2023 Architecting the columnar morphology of sculptured thin films for polarization-universal bandgaps

Ricardo A. Fiallo, Mark W. Horn, Akhlesh Lakhtakia

Proceedings Volume 12477, International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors 2022; 124770F (2023) https://doi.org/10.1117/12.2646145
Event: International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors, 2022, Boston, Massachusetts, United States

Abstract

Columnar thin films are assemblies of parallel straight columns of nanoscale cross-sectional dimensions grown by physical vapor deposition on appropriate substrates. Sculptured thin films are similar, but the columnar shape is architected for specific objectives. Polarization-universal bandgaps with maximum transmittance under 20% were realized as sculptured thin films of two different types: (i) tightly interlaced matched ambidextrous bilayers (TIMABs) to modify the circular Bragg phenomenon and (ii) equichiral sculptured thin films (ECSTFs) that display the Bragg phenomenon. The serial bideposition technique was employed for architecting the columns. Samples characterized optically as well as with scanning electron microscopy.

Citation Download Citation

Ricardo A. Fiallo, Mark W. Horn, and Akhlesh Lakhtakia "Architecting the columnar morphology of sculptured thin films for polarization-universal bandgaps", Proc. SPIE 12477, International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors 2022, 124770F (31 January 2023); https://doi.org/10.1117/12.2646145

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