Bowtie Nanoantennas with Polynomial Sides in the Excitation and Emission Regimes
نویسندگان
چکیده
In this work, we analyze modified bowtie nanoantennas with polynomial sides in the excitation and emission regimes. In the excitation regime, the antennas are illuminated by an incident plane wave, and in the emission regime, the excitation is fulfilled by infinitesimal electric dipole positioned in the gap of the nanoantennas. Several antennas with different sizes and polynomial order were numerically analyzed by method of moments. The results show that these novel antennas possess a controllable resonance by the polynomial order and good characteristics of near field enhancement and confinement for applications in enhancement of spontaneous emission of a single molecule.
منابع مشابه
Tunable optical response of bowtie nanoantenna arrays on thermoplastic substrates.
Thermally responsive polymers present an interesting avenue for tuning the optical properties of nanomaterials on their surfaces by varying their periodicity and shape using facile processing methods. Gold bowtie nanoantenna arrays are fabricated using nanosphere lithography on prestressed polyolefin (PO), a thermoplastic polymer, and optical properties are investigated via a combination of spe...
متن کاملLarge single-molecule fluorescence enhancements produced by a bowtie nanoantenna
Owing to the size mismatch between light and nanoscale objects such as single molecules, it is important to be able to control light–molecule interactions1–4. Plasmonic nanoantennas create highly enhanced local fields when pumped resonantly, leading to increased Raman scattering5, but whether fluorescence enhancement occurs depends upon a variety of factors. Although sharp metal tips6 and collo...
متن کاملMetamaterial study of quasi-three-dimensional bowtie nanoantennas at visible wavelengths
In this paper, a novel array of quasi-three-dimensional (quasi-3D) bowtie nanoantennas has been investigated numerically and experimentally. A low-cost and facile method has been designed and implemented to fabricate the quasi-3D bowtie nanoantennas. The fabrication processes containing laser patterning and wet etching have demonstrated the advantages of easily tuning the periodic and diameter ...
متن کاملFluorescence correlation spectroscopy at high concentrations using gold bowtie nanoantennas
Fluorescence correlation spectroscopy (FCS) measures the fluorescence fluctuations of fluorophores in solution, but is restricted to extremely low concentrations. Plasmonic gold bowtie nanoantennas enhance a single molecule’s fluorescence relative to a large background of unenhanced molecules, and here we show that bowties can extend FCS measurements to much higher concentrations. In this demon...
متن کاملBowtie plasmonic nanoantenna arrays for polarimetric optical biosensing
We report on the first polarimetric plasmonic biosensor based on arrays of bowtie nanoantennas. Using the Finite Element Method (FEM) the phase retardation between the components of light polarized parallel and perpendicular to the axis of the nanoantennas is studied. After optimizing them for high volumetric sensitivity at a wavelength of 780 nm, sensitivities ~5 rad/RIU are obtained, correspo...
متن کامل