Imaging and spectroscopy through plasmonic nano-probe

Abstract

Abstract. This article is a comprehensive review of the subject of near-field nano imaging and spectroscopy by surface plasmon polaritons induced on a metallized probe. The emphasis of the review is on fundamental aspects of plasmon enhancement and near-field spectroscopy, which are categorized as optical antenna structures, polarization properties in near-field, resonance frequency of surface plasmons, etc. Most recent studies that contribute to the understanding and interpretation of these phenomena are highlighted. Applications of near-field optics as newly established analytical tools for biology, materials sciences and plasmonic superlenses are included in the article.

Tip-enhanced Raman scattering (TERS) and high-resolution bio nano-analysis—a comparison

“…The second corresponds to the image dipole underneath the metal surface. 66,72 It was found that radially polarized light is more efficient, when illuminating the tip from below, than linear polarized light, because only field components parallel to the tip axis contribute to the signal enhancement. 48,65,73 In Fig.…”

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

“…The plasmonic properties of noble metal nanoparticles (for example, nanospheres composed of gold or silver) have recently been studied and adopted extensively at infrared and optical frequencies because they offer a new range of possible applications, such as the enhancement of Raman spectra [1,2], their use for biosensor devices [3,4], and their potential aptitude to produce artificial magnetism [5][6][7][8][9][10][11]. Furthermore, periodic arrangements of metal nanoparticles present peculiar properties that could be applied to produce enhancement of evanescent fields in subwavelength regions [12][13][14][15][16][17][18], among other innovative applications.…”

Direct electron density modulation of surface plasmons with a scanning electron microscope

“…ocalized surface plasmon resonance (LSPR) mediated on a metal particle is of interest because of its ability to confine light and enhance an electric field in nanometric space, 1) and it is the theory behind biosensors, 2) photocatalytic reactions, 3) and high-sensitivity spectroscopic imaging. 4,5) Thus, the properties of LSPR need to be experimentally determined under a variety of conditions. There has been considerable research on the coupling efficiency of fabricated novel nanostructures with LSPR and the incident photon energy.…”