Structural color filters with compensated angle-dependent shifts

Rovenská, Katarína; Ligmajer, Filip; Idesová, Beáta; Kepič, Peter; Liška, Jiří; Chochol, Jan; Šikola, Tomáš

Structural color filters with compensated angle-dependent shifts

Files

OE.506069_final.pdf(10.58 MB)

Date

2023-12-18

Authors

Rovenská, Katarína

Ligmajer, Filip

Idesová, Beáta

Kepič, Peter

Liška, Jiří

Chochol, Jan

Šikola, Tomáš

ORCID

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Abstract

Structural color filters use nano-sized elements to selectively transmit incident light, offering a scalable, economical, and environmentally friendly alternative to traditional pigment- and dye-based color filters. However, their structural nature makes their optical response prone to spectral shifts whenever the angle of incidence varies. We address this issue by introducing a conformal VO2 layer onto bare aluminum structural color filters. The insulator-metal transition of VO2 compensated the spectral shift of the filter’s transmission at a 15° tilt with 80% efficiency. Unlike solutions that require adjustment of the filter’s geometry, this method is versatile and suitable also for existing structural filters. Our findings also establish tunable materials in general as a possible solution for angle-dependent spectral shifts.

Keywords

Angle of Incidence, Angle-dependent, Color filters, Dye-based colors, Environmentally friendly alternatives, Incident light, Nano-sized elements, Optical response, Spectral shift, Structural color

Citation

OPTICS EXPRESS. 2023, vol. 31, issue 26, p. 43048-43056.
https://opg.optica.org/oe/fulltext.cfm?uri=oe-31-26-43048&id=544124

Document type

Peer-reviewed

Document version

Published version

Language of document

en

Document licence

(C)