Optical Yagi-Uda nanoantennas

Optical spectrometer at the nanoscale using optical Yagi-Uda nanoantennas

Here we present and analyze an optical spectrum analyzer at the nanometer scale that is able to distribute different frequency contents of the radiation of an optical dipole source into different directions in the space. The spectrum analyzer is composed of arrays of optical Yagi-Uda nanoantennas, forming relatively narrow radiation patterns operating at different frequencies. The optical Yagi-...

Compact Nonlinear Yagi-Uda Nanoantennas

Nanoantennas have demonstrated unprecedented capabilities for manipulating the intensity and direction of light emission over a broad frequency range. The directional beam steering offered by nanoantennas has important applications in areas including microscopy, spectroscopy, quantum computing, and on-chip optical communication. Although both the physical principles and experimental realization...

Angular Radiation Patterns of Nanoantennas: an Optical Yagi-uda Antenna

We address experimentally the radiation patterns of quantum dots coupled to optical nanoantennas at specific positions. We show that the emission of the coupled system is determined by a variety of resonant and non-resonant antenna modes both in polarization and angular pattern. The first working optical Yagi-Uda antenna is presented and unidirectional emission is demonstrated for a limited spe...

Huygens Optical Elements and Yagi – Uda Nanoantennas Based on Dielectric Nanoparticles

593 1. INTRODUCTION Investigation of optical nanoantennas is a new, rapp idly developing field of modern optics. Nanoantennas are devices that transform freely propagating optical radiation into the field that is strongly localized in a certain region and vice versa [1–9]. They are interestt ing primarily because they make it possible to increase the efficiency of controlling and governing elec...

Multipole methods for nanoantennas design: applications to Yagi-Uda configurations