Kim, Taehyun Woo, Hyeonbin Baek, Ji Min Choi, Seungyeop Kim, Min-Joong Seong, Hyejeong Seo, Minah Kwon, Oh Seok Kim, Dong-Hwan Ryu, Yong-Sang 2025-11-19T01:05:24Z 2025-11-19T01:05:24Z 2025-11-16 2026-03 1616-301X https://pubs.kist.re.kr/handle/201004/153525 Achieving drastic color tuning in nanophotonic devices requires nanostructures optimized through a deep understanding of light-matter interactions, including resonance wavelengths and their associated electric-field distributions. This study rigorously investigates heat-assisted nanoparticle rearrangement to achieve precise color tuning. A Fabry–Pérot (FP) etalon is proposed, comprising multi-layered metal–dielectric–metal films, plasmonic nanoparticle assembly, a fluoropolymer dielectric, and a metal mirror layer, enabling nanoparticle-behavior tracking at visible wavelengths. Through controlled experiments and simulations, the roles of physical elements in the FP etalon are investigated, particularly the optical cavity thickness and the filling fraction of the top layer. To enhance color variation through the dynamic behavior of nanoparticles during successive heating processes, a flowable polymer film is prepared as a dielectric layer, and color tunability is systematically examined. The investigation focuses on the heat-assisted dynamic behavior of nanoparticles, including the submergence and coalescence of gold nanoparticles, along with the simultaneous shrinkage of the surrounding polymer film. Based on the results, laser-mediated local color tuning via the photothermal effect of gold nanoparticles is performed for potential application as a color printing technique. English John Wiley & Sons Ltd. Plasmonic Color Printing in Nanophotonic Devices via Photothermal Dynamics in a Fabry–Pérot Etalon Article 10.1002/adfm.202521445 1 Advanced Functional Materials, v.36, no.22 Advanced Functional Materials 36 22 N scie scopus Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article; Early Access cavity tuning color printing Fabry-P & eacute rot resonator nanoparticles photo-thermal effect