Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Subwavelength photonic nanojet processing of thin metal films using optical tweezers
Δημιουργός/Συγγραφέας:	Starinskiy, S.V. Giannakis, T. Chouchoumi, N. Sulyaeva, V.S. [EL] Τσιλιπάκος Οδυσσέας[EN] Tsilipakos, Odysseas [EL] Κάνδυλα, Μαρία[EN] Kandyla, Maria
Ημερομηνία:	2025
Γλώσσα:	Αγγλικά
ISSN:	24680230
DOI:	10.1016/j.surfin.2025.107192
Περίληψη:	We demonstrate subwavelength optical trap-assisted nanojet patterning of gold/palladium thin films, achieving feature sizes as small as 240 nm, which correspond to 0.45λ, and thus are narrower than the diffraction limit. Photonic nanojets are generated at the back surface of 2-μm silica spheres, optically trapped in water by a 1064-nm CW laser. For nanojet formation, the trapped microspheres are irradiated with a 532-nm ns laser. During this process, the formation of large cavitation bubbles can lead to explosive boiling of water, accompanied by the generation of a shock front. This effect destabilizes the trapped microspheres and disrupts the patterning process. To address this challenge, we simulate the water boiling dynamics and identify laser processing parameters that mitigate boiling effects. We employ Mie theory and Finite Element Modeling to numerically solve electromagnetic wave scattering on the microspheres and determine the optimum sphere-substrate distance and laser beam characteristics for nanojet processing. Photonic nanojet technology is particularly attractive for enabling laser processing of surfaces at spatial resolutions below the diffraction limit. Contactless, subwavelength processing of metallic surfaces with high positioning precision offers promising applications in miniaturized electronic circuits and plasmonic metamaterials.
Τίτλος πηγής δημοσίευσης:	Surfaces and Interfaces
Τόμος/Κεφάλαιο:	72
Θεματική Κατηγορία:	[EL] Εφαρμοσμένη οπτική. Φωτονική[EN] Applied optics. Photonics [EL] Νανοτεχνολογία[EN] Nanotechnology
Λέξεις-Κλειδιά:	Optical tweezers Photonic nanojets Sub-diffraction processing Laser ablation in liquid AuPd metallic thin film Water boiling
Χρηματοδότης:	European Union Russian Science Foundation
EU Grant:	Marie Skłodowska-Curie Postdoctoral Fellowship Evolution of physico-chemical processes during additive laser synthesis of microstructures in liquid
EU Grant identifier:	№101,067,553 (LANAFUSEHA) No 24–79–10,070
Κάτοχος πνευματικών δικαιωμάτων:	© 2025 The Authors. Published by Elsevier B.V.
Όροι και προϋποθέσεις δικαιωμάτων:	This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1016/j.surfin.2025.107192
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο