Sreekanth, K. V., Jana, S., ElKabbash, M., Singh, R., & Teng, J. (2024). Phase change material-based tunable Fano resonant optical coatings and their applications. Nanophotonics, 0(0). https://doi.org/10.1515/nanoph-2023-0723
Abstract:
Abstract
Thin-film coatings offer a scalable optical platform, as compared to nanopatterned films, for various applications including structural coloring, photovoltaics, and sensing. Recently, Fano resonant optical coatings (FROCs) have gained attention. FROCs consist of coupled thin film nanocavities composed of a broadband and a narrowband optical absorber. The optical properties of FROCs can be dynamically adjusted using chalcogenide phase change materials (PCM). Switching the structural states of PCM layers in the cavity between amorphous and crystalline states, the Fano resonance supported by FROC can be modulated in terms of resonance wavelength, intensity, and bandwidth. This review discusses the scientific and technological facets of both passive and active FROCs for applications in structural coloring and spectrum-splitting filters. We explore electrically tunable FROCs for dynamic color generation and optical steganography. Furthermore, we discuss the utilization of passive and active FROCs as spectrum-splitting filters to mitigate the drop in photovoltaic efficiency of solar cells due to heating and for hybrid thermal-electric power generation.
License type:
Attribution 4.0 International (CC BY 4.0)
Funding Info:
This research / project is supported by the National Research Foundation - Competitive Research Programme
Grant Reference no. : NRF-CRP26-2021-0004
This research / project is supported by the A*STAR - AME Individual Research Grant
Grant Reference no. : A2083c0058
This research / project is supported by the A*STAR - AME Individual Research Grant
Grant Reference no. : A20E5c0084
This research / project is supported by the A*STAR - HBMS IAF-PP
Grant Reference no. : H19H6a0025
This research / project is supported by the A*STAR - MTC Individual Research Grant
Grant Reference no. : M22L1b0110