Title :
MEG/STRD modeling of optical antenna sensors as micro rectangular apertures
Author :
Massaro, Alessandro ; Spano, Fabrizio ; Athanassiou, Athanassia ; Cingolani, Roberto
Author_Institution :
Center for Bio-Mol. Nanotechnol., IIT, Arnesano, Italy
Abstract :
In this paper we present a novel model for the design of micrometric optical antennas. The accuracy of the model allows to evaluate the near field generated by a micrometric aperture in parallel-plate waveguides. The model starts from the equivalent source distribution of magnetic current excitation of a rectangular aperture and it proceeds by employing the multipole expansion of the Green´s function (MEG) applied to the aperture, including the analysis of the electromagnetic field in proximity of metallic discontinuities. The presented method introduces the novel principle of simultaneous transverse resonance diffraction (STRD) which determines the order of singularity for different edges at optical frequencies. The approach is suitable for inclusion in standard electromagnetic (EM) simulators.
Keywords :
Green´s function methods; antennas; light diffraction; micro-optomechanical devices; microsensors; optical design techniques; optical sensors; optical waveguides; Green function; electromagnetic field; equivalent source distribution; magnetic current excitation; metallic discontinuities; micrometric optical antennas; microrectangular apertures; multipole expansion; optical frequencies; optical sensors; parallel-plate waveguides; simultaneous transverse resonance diffraction; standard electromagnetic simulators; Adaptive optics; Apertures; Biomedical optical imaging; Optical diffraction; Optical sensors; Optical waveguides; Physical optics; MEG Modeling; Optical Antenna; Optical Sensor;
Conference_Titel :
Numerical Simulation of Optoelectronic Devices (NUSOD), 2011 11th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-61284-876-1
Electronic_ISBN :
2158-3234
DOI :
10.1109/NUSOD.2011.6041140
