TY - JOUR

T1 - Resonant channeling of light near metal surface by passive and active silicon nanoparticles

AU - Yaroshenko, Vitaly

AU - Zuev, Dmitry

AU - Evlyukhin, Andrey B.

N1 - Funding Information: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Dmitry Zuev reports financial support was provided by Russian Foundation for Basic Research. Vitaly Yaroshenko reports financial support was provided by Russian Foundation for Basic Research. Andrey B. Evlyukhin reports financial support was provided by German Research Foundation. Funding Information: Numerical simulations of the passive system were supported by Russian Foundation for Basic Research according to the research project No. 20-37-90147 . Numerical model and simulations of the active system were supported by Russian Foundation for Basic Research according to the research project No. 18-29-20107 . The analytical research was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453 ). We thank Pavel Kustov for Fig. 1 a preparation.

PY - 2022/11

Y1 - 2022/11

N2 - We investigate the optical response of passive (homogeneous) and active (doped by a magnetic-dipole source) silicon nanospheres placed above the gold substrate supporting excitation and propagation of surface plasmon polaritons (SPPs). In the case of the passive system, the influence of the particle electric and magnetic dipole resonances on the channeling of scattered light into the two channels: light-into-light and light-into-SPPs, is studied around the telecommunication wavelength range. Scattering efficiencies of both channels are analytically and numerically calculated and compared for different gaps between the nanosphere and gold substrate. Conditions, under which the resonant distribution of energy between SPPs and light channels can be approximately equal to each other, are revealed. In the case of an active system, associated with a magnetic dipole source embedded in a silicon resonator, two separate emission channels into light and into SPPs are considered as well. The radiation efficiency in each channel as a function of the gap is examined and compared. In particular, it is revealed the conditions when the efficiency of resonant light energy propagation along the two channels is practically equal to each other, and the Purcell factor achieves the value almost two times higher than for the case without the substrate. The obtained results elucidate the features introduced by the Mie dipole resonances of silicon nanospheres to control the light scattering (radiation) and the SPP excitation in dielectric/metal interface systems. The results obtained are perspectives for the development of new compact photonic and plasmonic devices operating at standard telecommunication wavelength ranges.

AB - We investigate the optical response of passive (homogeneous) and active (doped by a magnetic-dipole source) silicon nanospheres placed above the gold substrate supporting excitation and propagation of surface plasmon polaritons (SPPs). In the case of the passive system, the influence of the particle electric and magnetic dipole resonances on the channeling of scattered light into the two channels: light-into-light and light-into-SPPs, is studied around the telecommunication wavelength range. Scattering efficiencies of both channels are analytically and numerically calculated and compared for different gaps between the nanosphere and gold substrate. Conditions, under which the resonant distribution of energy between SPPs and light channels can be approximately equal to each other, are revealed. In the case of an active system, associated with a magnetic dipole source embedded in a silicon resonator, two separate emission channels into light and into SPPs are considered as well. The radiation efficiency in each channel as a function of the gap is examined and compared. In particular, it is revealed the conditions when the efficiency of resonant light energy propagation along the two channels is practically equal to each other, and the Purcell factor achieves the value almost two times higher than for the case without the substrate. The obtained results elucidate the features introduced by the Mie dipole resonances of silicon nanospheres to control the light scattering (radiation) and the SPP excitation in dielectric/metal interface systems. The results obtained are perspectives for the development of new compact photonic and plasmonic devices operating at standard telecommunication wavelength ranges.

KW - Magnetic dipole

KW - Mie resonance

KW - Surface plasmon polariton (SPP)

UR - http://www.scopus.com/inward/record.url?scp=85138382408&partnerID=8YFLogxK

U2 - 10.1016/j.surfin.2022.102344

DO - 10.1016/j.surfin.2022.102344

M3 - Article

AN - SCOPUS:85138382408

VL - 34

JO - Surfaces and Interfaces

JF - Surfaces and Interfaces

SN - 2468-0230

M1 - 102344

ER -