A single particle plasmon resonance study of 3D conical nanoantennas

Abstract

Metallic nanocones are well-suited optical antennas for near-field microscopy and spectroscopy, exhibiting a number of different plasmonic modes. A major challenge in using nanocones for many applications is maximizing the signal at the tip while minimizing the background from the base. It is shown that nanocone plasmon resonance properties can be shifted over a wide range of wavelengths by variation of the substrate, material, size and shape, enabling potential control over specific modes and field distributions. The individual resonances are identified and studied by correlated single particle dark field scattering and scanning electron microscopy in combination with numerical simulations.

Coupling single quantum dots to plasmonic nanocones: optical properties

“…Fig. 36. The spectra of a continuous gold lm resulting from excitation by 488 nm radiation reveal no signicant difference for excitation by APM or RPM (cf.…”

“…36 Two different conditions are illustrated in Fig. 36 Two different conditions are illustrated in Fig.…”

Fabrication of a plasmonic nanocone on top of an AFM cantilever

“…As can be seen in Fig. 2(d), this nano-mask is roughly centred on the plateau and has a circular shape, which grants the final conical shape of the plasmonic nanostructure after mask transfer [22][23][24][25][26][27][28]. The height of the pillar as in Fig.…”

“…They showed a lateral topographical resolution of several 10 nm, and strong enhancement of the Raman signal has been observed with Au nanocones [27]. Furthermore by tailoring the size and aspect ratio of such nanocones, their plasmon resonance can be tuned to match different types of samples [28]. Due to its relatively high etching rate a considerable height was required for the platinum mask, and due to the critical control of precursor gas flow at a tip some variability was introduced through the FEBID process.…”

Superhydrophobic Devices Molecular Detection

“…Microfabrication techniques are largely contributing to design and fabricate nano-and micropatterned devices for singlemolecule manipulation, probing, and sensing. For instance, nanopores [9], nanochannels [10][11][12], nanomechanical sensors [13], nanoantennas [14,15], and more generally laboratory-on-chips [16,17] are the ultimate developments of micronanotechnology aimed at single-molecule detection. In this paper, we describe how our micro-and nanofabricated superhydrophobic surfaces can be used to concentrate and vehiculate to specific detection points the analyte to achieve single-molecule detection with a high signal-to-noise ratio, allowing X-ray diffraction, Raman spectroscopy, and electron microscopy characterizations.…”