TY - JOUR

T1 - Femtosecond Laser-Assisted Formation of Hybrid Nanoparticles from Bi-Layer Gold–Silicon Films for Microscale White-Light Source

AU - Koromyslov, Sergei

AU - Ageev, Eduard

AU - Ponkratova, Ekaterina

AU - Larin, Artem

AU - Shishkin, Ivan

AU - Danilov, Denis

AU - Mukhin, Ivan

AU - Makarov, Sergey

AU - Zuev, Dmitry

N1 - Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/5/21

Y1 - 2022/5/21

N2 - It is very natural to use silicon as a primary material for microelectronics. However, silicon application in nanophotonics is limited due to the indirect gap of its energy band structure. To improve the silicon emission properties, it can be combined with a plasmonic part. The resulting metal–dielectric (hybrid) nanostructures have shown their excellence compared to simple metallic dielectric nanostructures. Still, in many cases, the fabrication of such structures is time consum-ing and quite difficult. Here, for the first time, we demonstrate a single-step and lithography-free laser-induced dewetting of bi-layer nanoscale-thickness gold–silicon films supported by a glass substrate to produce hybrid nanoparticles. For obtaining hybrid nanoparticles, we study nonlinear photoluminescence by mapping their optical response and morphology by scanning electron mi-croscopy. This method can be used for the fabrication of arrays of hybrid nanoparticles providing white-light photoluminescence with a good control of their microscopic sizes and position. The developed approach can be useful for a wide range of photonic applications including the all-optical data processing and storage where miniaturization down to micro-and nanoscale together with an efficiency increase is of high demand.

AB - It is very natural to use silicon as a primary material for microelectronics. However, silicon application in nanophotonics is limited due to the indirect gap of its energy band structure. To improve the silicon emission properties, it can be combined with a plasmonic part. The resulting metal–dielectric (hybrid) nanostructures have shown their excellence compared to simple metallic dielectric nanostructures. Still, in many cases, the fabrication of such structures is time consum-ing and quite difficult. Here, for the first time, we demonstrate a single-step and lithography-free laser-induced dewetting of bi-layer nanoscale-thickness gold–silicon films supported by a glass substrate to produce hybrid nanoparticles. For obtaining hybrid nanoparticles, we study nonlinear photoluminescence by mapping their optical response and morphology by scanning electron mi-croscopy. This method can be used for the fabrication of arrays of hybrid nanoparticles providing white-light photoluminescence with a good control of their microscopic sizes and position. The developed approach can be useful for a wide range of photonic applications including the all-optical data processing and storage where miniaturization down to micro-and nanoscale together with an efficiency increase is of high demand.

KW - bi-layer gold–silicon films

KW - broadband photoluminescence

KW - dewetting

KW - hybrid nanoparticles

KW - laser-induced nanoparticles

UR - http://www.scopus.com/inward/record.url?scp=85130351643&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/742bb97a-6a60-31af-88f2-13a853eeb6a7/

U2 - 10.3390/nano12101756

DO - 10.3390/nano12101756

M3 - Article

C2 - 35630977

AN - SCOPUS:85130351643

VL - 12

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 10

M1 - 1756

ER -