Large and Versatile Plasmonic Enhancement of Photoluminescence Using Colloidal Metallic Nanocubes

Abstract

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Study of the Photoluminescence Enhancement Observed in ZnO Nanowire Gratings Optimally Grown by the Hydrothermal Method

“…ZnO NW arrays patterned like a 2D photonic crystals have, for example, demonstrated a 34% increase in emission intensity of GaN based blue LEDs [15] and have enabled significant enhancement of the luminescence and lasing behavior. [16] Besides this dielectric approach, plasmonic components using metallic nanoparticles [17] or subwavelength periodic structures have also been investigated. [18,19] Using this kind of approach, radiation properties of localized surface plasmon can also help for the light extraction.…”

Nanoantennas Patterned by Colloidal Lithography for Enhanced Nanophosphor Light Emission

“…Metallic nanoparticles feature large scattering cross sections and may provide resonant photoexcitation and/or enhanced radiative decay for emitters whose position spatially overlaps with the field profile of the LSPR at a frequency that spectrally matches the excitation or emission band of the emitter, respectively . In the particular case of phosphor coatings, many studies report on the combination of metal nanoparticles randomly dispersed with phosphor powders or phosphor films that yield few-fold emission enhancement due to the LSPR coupling. − Nevertheless, the properties of the LSPR are mainly determined by the size and shape of the metal nanoparticle . For this reason, it is central to achieve a precise control of the fabrication of the plasmonic nanostructure and its relative position with respect to the emitting layer.…”

“… 30 In the particular case of phosphor coatings, many studies report on the combination of metal nanoparticles randomly dispersed with phosphor powders or phosphor films that yield few-fold emission enhancement due to the LSPR coupling. 31 − 37 Nevertheless, the properties of the LSPR are mainly determined by the size and shape of the metal nanoparticle. 38 For this reason, it is central to achieve a precise control of the fabrication of the plasmonic nanostructure and its relative position with respect to the emitting layer.…”

Enhanced Spontaneous Light Emission of ZnO Nanowire-Based Gratings

“…The first solution has been implemented with dielectric photonic crystals , and gratings that open diffraction orders able to extract the generated photons in selected directions. In the latter approach, the increase in light extraction stems from the scattering mechanism attributed to the intentionally roughened interface between the active material and air. − Such approaches can also benefit from the high electromagnetic confinement provided by the use of plasmonic antennas or high dielectric particles. − …”