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Zhou X, Zhu H, Cao K, Wang Y, Kong Y, Cao J. Color Generation and Polarization-Sensitive Encryption by Laser Writing on Plasmonic Reflector Arrays. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38982632 DOI: 10.1021/acsami.4c07401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
Plasmonic color printing presents a sustainable solution for vibrant and durable color reproduction by leveraging the light-manipulating properties of nanostructures. However, the fabrication of plasmonic nanostructures has posed challenges, hindering widespread adoption. In this paper, we introduce plasmonic reflector arrays (PRAs) composed of three layers─Ag nanoparticles (NPs), an Al2O3 spacer, and an Ag reflector─deposited via physical vapor deposition (PVD). By employing nanosecond and femtosecond laser writing techniques, we manipulate the surface morphology of silver nanoparticles on PRAs, resulting in a diverse range of structural colors that are both polarization-insensitive and polarization-sensitive. Furthermore, we demonstrate the versatility of nanosecond laser writing in creating intricate patterns on PRAs. Additionally, we propose a novel two-step method combining nanosecond and femtosecond laser processing to embed QR code patterns into PRAs, showcasing their potential for secure data encryption and transmission. This research underscores the promising applications of PRAs in advanced color printing and secure optical data encoding.
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Affiliation(s)
- Xuran Zhou
- School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
| | - Huaxin Zhu
- School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
| | - Kai Cao
- School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
| | - Yueke Wang
- School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
| | - Yan Kong
- School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
| | - Jianjun Cao
- School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
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Coviello V, Badocco D, Pastore P, Fracchia M, Ghigna P, Martucci A, Forrer D, Amendola V. Accurate prediction of the optical properties of nanoalloys with both plasmonic and magnetic elements. Nat Commun 2024; 15:834. [PMID: 38280888 PMCID: PMC10821890 DOI: 10.1038/s41467-024-45137-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 01/15/2024] [Indexed: 01/29/2024] Open
Abstract
The alloying process plays a pivotal role in the development of advanced multifunctional plasmonic materials within the realm of modern nanotechnology. However, accurate in silico predictions are only available for metal clusters of just a few nanometers, while the support of modelling is required to navigate the broad landscape of components, structures and stoichiometry of plasmonic nanoalloys regardless of their size. Here we report on the accurate calculation and conceptual understanding of the optical properties of metastable alloys of both plasmonic (Au) and magnetic (Co) elements obtained through a tailored laser synthesis procedure. The model is based on the density functional theory calculation of the dielectric function with the Hubbard-corrected local density approximation, the correction for intrinsic size effects and use of classical electrodynamics. This approach is built to manage critical aspects in modelling of real samples, as spin polarization effects due to magnetic elements, short-range order variability, and size heterogeneity. The method provides accurate results also for other magnetic-plasmonic (Au-Fe) and typical plasmonic (Au-Ag) nanoalloys, thus being available for the investigation of several other nanomaterials waiting for assessment and exploitation in fundamental sectors such as quantum optics, magneto-optics, magneto-plasmonics, metamaterials, chiral catalysis and plasmon-enhanced catalysis.
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Affiliation(s)
- Vito Coviello
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, 35131, Padova, Italy
| | - Denis Badocco
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, 35131, Padova, Italy
| | - Paolo Pastore
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, 35131, Padova, Italy
| | - Martina Fracchia
- University of Pavia, Department of Chemistry, viale Taramelli 16, 27100, Pavia, Italy
- INSTM, National Inter-University Consortium for Materials Science and Technology, Via G. Giusti 9, 50121, Florence, Italy
| | - Paolo Ghigna
- University of Pavia, Department of Chemistry, viale Taramelli 16, 27100, Pavia, Italy
- INSTM, National Inter-University Consortium for Materials Science and Technology, Via G. Giusti 9, 50121, Florence, Italy
| | - Alessandro Martucci
- INSTM, National Inter-University Consortium for Materials Science and Technology, Via G. Giusti 9, 50121, Florence, Italy
- Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131, Padova, Italy
| | - Daniel Forrer
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, 35131, Padova, Italy.
- CNR - ICMATE, via Marzolo 1, 35131, Padova, Italy.
| | - Vincenzo Amendola
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, 35131, Padova, Italy.
- INSTM, National Inter-University Consortium for Materials Science and Technology, Via G. Giusti 9, 50121, Florence, Italy.
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