2017
Applied Physics Letters, Q1
Статьи в журналах
S. Syubaev, A. Nepomnyashchiy, E. Mitsai, E. Pustovalov, O. Vitrik, S. Kudryashov, and A. Kuchmizhak. Fabrication of porous microrings via laser printing and ion-beam post-etching // Applied Physics Letters 2017, 111, 083102.
Pulsed-laser dry printing of noble-metal microrings with a tunable internal porous structure, which can be revealed via an ion-beam etching post-procedure, was demonstrated. The abundance and average size of the pores inside the microrings were shown to be tuned in a wide range by varying the incident pulse energy and a nitrogen doping level controlled in the process of magnetron deposition of the gold film in the appropriate gaseous environment. The fabricated porous microrings were shown to provide many-fold near-field enhancement of incident electromagnetic fields, which was confirmed by mapping of the characteristic Raman band of a nanometer-thick covering layer of Rhodamine 6G dye molecules and supporting finite-difference time-domain calculations. The proposed laser-printing/ion-beam etching approach is demonstrated to be a unique tool aimed at designing and fabricating multifunctional plasmonic structures and metasurfaces for spectroscopic bioidentification based on surface-enhanced infrared absorption, Raman scattering, and photoluminescence detection schemes.
https://doi.org/10.1063/1.4993885