Non-Absorbing Dielectric Materials for Surface-Enhanced Spectroscopies and Chiral Sensing in the UV

Abstract

Low-loss dielectric nanomaterials are being extensively studied as novel platforms for enhanced light-matter interactions. Dielectric materials are more versatile than metals when nanostructured as they are able to generate simultaneously electric- and magnetic-type resonances. This unique property gives rise to a wide gamut of new phenomena not observed in metal nanostructures such as directional scattering conditions or enhanced optical chirality density. Traditionally studied dielectrics such as Si, Ge or GaP have an operating range constrained to the infrared and/or the visible range. Tuning their resonances up to the UV, where many biological samples of interest exhibit their absorption bands, is not possible due to their increased optical losses via heat generation. Herein, we report a quantitative survey on the UV optical performance of 20 different dielectric nanostructured materials for UV surface light-matter interaction based applications. The near-field intensity and optical chirality density averaged over the surface of the nanoparticles together with the heat generation are studied as figures of merit for this comparative analysis.

Synthesis and Study of Palladium Mono- and Bimetallic (with Ag and Pt) Nanoparticles in Catalytic and Membrane Hydrogen Processes

“…Nanoparticles are most widely used in medicine [ 23 , 24 ], spectroscopy [ 25 , 26 ], catalysis [ 27 , 28 ], and energy [ 29 , 30 ]. Catalysis and energy fields are of main interest in this paper, since the development of advanced catalysts based on metal nanoparticles with improved activity, selectivity and stability is an important and relevant task [ 31 , 32 , 33 ].…”

Plasmonics: Enabling functionalities with novel materials

“…However, as a result of their relatively large losses and limited frequency ranges, a broad spectrum of materials is currently being explored as low-loss alternatives for expanding resonances into the UV, mid-IR, and THz regimes. These include, but are not limited to, doped oxides, ceramics, high refractive index (HRI) semiconductors, chiral assemblies, 4 and 2D materials. These developments also include new possibilities for controlling the direction of scattered light by capitalizing on coherent interactions between electric and magnetic resonances.…”

Correction: Rosales et al. Non-Absorbing Dielectric Materials for Surface-Enhanced Spectroscopies and Chiral Sensing in the UV. Nanomaterials 2020, 10, 2078

“…In the published study [ 1 ], a mistake was reported in the method of obtaining the mean value over the spherical nanoparticle surface of the near-field enhancement (NFE, ) and the optical chirality density (OCD, ). Recently, we have been advised that the way we obtained the mean values is incorrect: The mean value of the dispersion of points is obtained from the evaluation of the OCD and NFE using the coordinates generated on the surface of the sphere from a homogeneous 2D mesh grid in the polar angles .…”