Mr. Brandon Grayol Profile

Brandon Grayol

at Dillard Univ

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Proceedings Article | 30 September 2024 Presentation + Paper

Photonic nanocomposite films with plasmonic metal nanoparticles for ultraviolet sensing

Abdalla Darwish, Sergey Sarkisov, Al Amin Kabir, David Rossmanith, Darayas Patel, Brandon Grayol, Jailyn Davis, Datjuan Harris, Anja Hribljan, Paolo Mele, Giovanna Latronico

Proceedings Volume 13140, 1314002 (2024) https://doi.org/10.1117/12.3027328

KEYWORDS: Nanoparticles, Ultraviolet radiation, Nanocomposites, Metals, Copper, Polymers, Aluminum, Silver, Laser ablation, Gold

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There is a continuous demand for more sensitive detectors of ultraviolet (UV) radiation. Popular silicon-based optoelectronic photodetectors perform poorly in UV spectrum. Integration of photoluminescent (PL) media capable of down-converting UV into visible (VIS) light (more suitable for silicon) with the photodetectors improve their UV sensitivity. We considered two such media: polymer nanocomposites impregnated with the nanoparticles (NPs) of perovskite CsPbBr₃ and phosphor NaEuF₄. We proposed to enhance the photoluminescence (PL) of the spectrum down-converting nanocomposites by embedding the nanoparticles (NPs) of high-entropy metal alloys (HEA) and using the surface plasmon polariton (SPP) resonance effect in such NPs. We proposed to fabricate HEA NPs and embed them in the nanocomposite using the patented concurrent multi-beam multi-target pulsed laser deposition (CMBMT-PLD) method. A two-step approach for making the nanocomposites impregnated with HEA NPs includes making HEA films using CMBMT-PLD followed by laser ablation of the films, formation of the HEA NPs during such ablation, and embedding them into a polymer matrix. By simulating the latter process with the ablation of the deposited HEA films in water the extension of the SPP resonance to the long-wave UV region (450 nm) has been demonstrated. A manifold improvement of the PL intensity of the nanocomposites due to SPP resonance in the embedded HEA NPs is expected. The obtained results will have an impact on the science and applications of short-wavelength sensors.

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