Plasmon induced modification of silicon nanocrystals photoluminescence in presence of gold nanostripes

Abstract

We report on the results of theoretical and experimental studies of photoluminescense of silicon nanocrystals in the proximity to plasmonic modes of different types. In the studied samples, the type of plasmonic mode is determined by the filling ratio of a one-dimensional array of gold stripes which covers the thin film with silicon nanocrystals on a quartz substrate. We analyze the extinction, photoluminesce spectra and decay kinetics of silicon nanocrystals and show that the incident and emitted light is coupled to the corresponding plasmonic mode. We demonstrate the modification of the extinction and photoluminesce spectra under the transition from wide to narrow gold stripes. The experimental extinction and photoluminescense spectra are in good agreement with theoretical calculations performed by the rigorous coupled wave analysis. We study the contribution of individual silicon nanocrystals to the overall photoluminescense intensity, depending on their spacial position inside the structure.

Photonic Bound States in the Continuum in Si Structures with the Self‐Assembled Ge Nanoislands

“…Please note that in this work the emissivity rather than a full photoluminescence response was simulated. The latter should include a nonhomogeneous spatial excitation profile [ 142 ] which was omitted here as we focused here on explaining the nature and symmetry of the resonances.…”

Raman Signal Enhancement Tunable by Gold-Covered Porous Silicon Films with Different Morphology

“…The Raman signal intensity calculated by Equation (1) is averaged over the orthogonal polarization states of incoming wave. From the electrodynamic point-of-view, this method of calculating the Raman signal intensity is analogous to the method of calculating the photoluminescence intensity where the excitation and out-coupling efficiencies are calculated separately at different photon energies and wavevectors [ 54 ]. In the case of Raman signal intensity, we neglect by difference between the energies of excitation and scattered light due to the small Stokes shift.…”

Vertical routing of spinning dipoles radiation from a chiral metamembrane

“…Peaks in Fig. 2 have asymmetric Fanotype shapes; they represent the quasiguided modes (also known as quasinormal guided modes [29,[41][42][43][44][45][46][47][48]) that appear in the emission spectra due to the grating assisted coupling of the emitted light with photon continuum of the far field [29,[49][50][51][52][53][54].…”