A numerical study of plasmon-induced enhancement of dipole emission by arrays of silver nanospheres and nanoprisms

E A Granizo,I Nabiev,V Krivenkov

doi:10.1088/1742-6596/2058/1/012005

Abstract

Plasmon-induced enhancement of the photoluminescence (PL) intensity of quantum emitters by plasmon nanoparticles (PNPs) is a promising approach for the design and fabrication of PL hybrid materials with improved properties for biosensing and optoelectronics applications. This enhancement can be achieved through careful selection of such parameters as the PNP’s shape, material, size, the type of the medium around them, as well as the excitation and emission wavelengths of the emitter. Here, we simulated the nano-hybrid materials based on arrays of silver nanospheres, nanoprisms, and their combinations, located on polymer films with embedded dipole emitters. For these systems, the Purcell effect, as well as the excitation enhancement, transmittance, and absorption were evaluated. The results show the way to improve the PL properties of thin hybrid films by careful design of their composition using developed models.

Highlights

Plasmon metal nanoparticles (PNPs) have been demonstrated to enhance the photoluminescence (PL) of fluorophores due to the effects of light-matter coupling [1]
Once the plasmon nanoparticles (PNPs) arrays were simulated on polymethyl methacrylate (PMMA), the extinction peaks in the nanospheres or nanoprisms arrays extinction spectra [4] match with the experimental results (Figure 2b)
The PL quantum yield (QY) is affected by the change in radiative and nonradiative rates of the dipole: QY(d)

Summary

Introduction

Plasmon metal nanoparticles (PNPs) have been demonstrated to enhance the photoluminescence (PL) of fluorophores due to the effects of light-matter coupling [1]. The local PL enhancement is limited by the losses inherent to the high nonradiative relaxation rates for plasmons, which leads to a reduction in the PL quantum yield (QY) of the plasmon-emitter system. A plasmon-induced enhancement of a dipole could be maximized when the nanoparticle should be able to couple with the emitter at both excitation and emission wavelength. We presented a set of simulations of dipole emission enhancement induced by PNP arrays of silver nanospheres and/or nanoprisms. The PL properties were evaluated for each PNP type and for their combinations to show the contribution of both nanoparticles in the dipole emission enhancement.

Finite element simulation

Results

Conclusion