Abdelraouf, O. A. M., Wang, X. C., Goh Ken, C. H., Lim Nelson, C. B., Ng, S. K., Wang, W. D., Renshaw Wang, X., Wang, Q. J., & Liu, H. (2023). All‐Optical Switching of Structural Color with a Fabry–Pérot Cavity. Advanced Photonics Research, 4(11). Portico. https://doi.org/10.1002/adpr.202300209
Abstract:
Fine tuning the optical responses of thin‐film devices is highly attractive for emerging applications, such as optical memories, solar cells, nanophotonics, and photodetectors. Even though thin‐film technology is well established, dynamically switching the optical responses of thin films after fabrication remains challenging because of passive materials and device structures. This work demonstrates an approach for all‐optical switching of structural colors excited by a Fabry–Pérot (FP) cavity inside a metal–dielectric–metal (MDM) thin‐film stack. A low‐loss phase‐change material (PCM), that is, antimony trisulfide (Sb2S3), which is embedded in the stack, enables efficient FP cavity resonance in the visible spectrum. 1) Color reflectivity of >60%; 2) multistructural colors using a single MDM cavity; 3) a wide dynamic range of colors of up to ≈220 nm; and 4) a gamut coverage of more than 80% of standard RGB (sRGB) are achieved. The all‐optical switching is realized via the crystallization and reamorphization of Sb2S3 using continuous‐wave and pulsed lasers, respectively. The findings provide a framework for the cost‐effective realization of dynamically responsive thin‐film‐based nanophotonic devices.
License type:
Attribution 4.0 International (CC BY 4.0)
Funding Info:
This research / project is supported by the A*STAR - MTC Programmatic
Grant Reference no. : grant no. A18A7b0058
This research / project is supported by the Ministry of Education - Academic Research Fund (AcRF) Tier 2
Grant Reference no. : MOE-T2EP50220-0005
This research / project is supported by the Ministry of Education - Academic Research Fund (AcRF) Tier 2
Grant Reference no. : MOE-T2EP50120-0006
This research / project is supported by the Ministry of Education - Academic Research Fund (AcRF) Tier 3
Grant Reference no. : OE2018-T3-1-002
This research / project is supported by the A*STAR - AME Individual Research Grants (IRG)
Grant Reference no. : A20E5c0094