منابع مشابه
Comparative study of DR Nanoantenna Array For Optical Frequencies
The frequency dependent complex permittivity of plasmonic materials is one of the most decisive parameters in their resonant characteristics. This work shows how the optical responses of gold (Au),and silver(Ag) optical nanoantennas are affected by their size, shape and their frequency dependent optical functions. The optical functions of these metals are described by the Drude-Lorentz model in...
متن کاملDesign of a Series Dr Nanoantenna Array for Optical Frequencies
Suitably shaped metal nanostructures acts as resonant optical antennas that efficiently collect light an confine it to a sub wavelength volume which has been modified by using the dielectric resonators working at optical frequencies. In radio frequencies and microwaves a category of antenna known as dielectric resonator antenna (DRA), whose radiant element is dielectric resonator (DR). In this ...
متن کاملOptical Nanoantenna Input Impedance
Optical nanoantennas have been studied as a means to manipulate nanoscale fields, local field enhancements, radiative rates, and emissive directional control. However, a fundamental function of antennas, the transfer of power between a coupled load and far-field radiation, has seen limited development in optical antennas owing largely to the inherent challenges of extracting impedance parameter...
متن کاملPhotonic Multitasking Interleaved Si Nanoantenna Phased Array.
Metasurfaces provide unprecedented control over light propagation by imparting local, space-variant phase changes on an incident electromagnetic wave. They can improve the performance of conventional optical elements and facilitate the creation of optical components with new functionalities and form factors. Here, we build on knowledge from shared aperture phased array antennas and Si-based gra...
متن کاملOptical emission of a molecular nanoantenna pair.
The optical emission from a pair of nanoantennas is investigated within the theoretical framework of quantum electrodynamics. The analysis of fluorescent emission from a pair of molecular antenna species in close proximity is prompted by experimental work on oriented semiconductor polymer nanostructures. Each physically different possibility for separation-dependent features in photon emission ...
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ژورنال
عنوان ژورنال: Nature Communications
سال: 2011
ISSN: 2041-1723
DOI: 10.1038/ncomms1268