Enhancement of Light Emission from Silicon by Precisely Tuning Coupled Localized Surface Plasmon Resonance of a Nanostructured Platinum Layer Prepared by Atomic Layer Deposition

Abstract

Plasmonic enhancement of photoluminescence from bulk silicon was achieved by spectrally tailoring coupled localized surface plasmon resonance (LSPR) in the Al2O3 cover/nanostructured platinum (nano-Pt)/Al2O3 spacer/silicon multilayer structures prepared by atomic layer deposition (ALD). Agreement between the simulation and experimental data indicates that the plasmonic activity originates from absorption enhancement due to coupled LSPR. Because of the optimized dielectric environment deposited by ALD around the nano-Pt layer, absorption of the multilayer structure was enhanced by the precise tuning of coupled LSPR to coincide with the excitation wavelength. This accurate plasmonic multilayer structure grown by ALD with high precision, tunability, uniformity, and reproducibility can be further applied in efficient light-emitting devices.

The critical role of intragap states in the energy transfer from gold nanoparticles to TiO2

“…Nevertheless, the Pt SPR was observed in many different nanostructures. [29][30][31][32][33] We first focus on samples modified with Au NPs. TEM and STEM images of Au/P25 ( Fig.…”

Directional Emission of Fluorescent Dye-Doped Dielectric Nanogratings for Lighting Applications

“…These are, for instance, employed to enhance the sunlight absorption in photovoltaic cells or to control lighting emission in the so-called white light-emitting diodes (LEDs). − The exploitation of different typologies of plasmonic resonances, arising at the interface between metals and dielectrics, is one such approach. This has been widely studied in the context of what is termed as surface-enhanced fluorescence. − The most common type is based on the coupling between metallic nanoantennas and dye luminescent materials, which results in great enhancement of the emitted light intensity. − However, the latter is confined in a very narrow spectral band, which can limit its use. Moreover, this approach is time consuming and costly because it involves several fabrication steps with nanometric or deep sub-micron resolution.…”

Fabrication of periodic arrays of metallic nanoparticles by block copolymer templates on HfO2substrates

“…The controlled generation of metallic nanoparticle (NP) arrays on dielectric films enables applications in different fields of physics and nanotechnology. Owing to the reduced size, noble metal NPs show enhanced catalytic activity [1,2], while the plasmon-enhanced luminescence associated with metallic NPs offers the possibility to concentrate and manipulate light, enabling a wide variety of applications including light emitting devices, photovoltaic applications and advanced sensing, such as surface-enhanced Raman scattering, localized surface plasmon resonance sensing and second harmonic generation [3][4][5][6][7][8]. Moreover, noble metal NPs offer an enhanced corrosion resistance to the reactive ion etching process that can be exploited for the patterning of deep features in nanolithographic processes devoted to microelectronic applications [9].…”