Nanophotonics of organic molecular waveguides towards active optical antenna

Abstract

Photons resides at the heart of nanophotonics and controlling freely propagatingphotons at nanoscale is an important aspects in these applications This effective controlover optical field at nanoscale has relevance in all scientific domains such as opticalcommunications biomedical and quantum computing etc All these nanophotonic applicationsbank on photons as an information carrier At the same time an additionalchallenge has appeared for practical realization of nanoscale information technology how to effectively communicate the optical energy to other coupled nanostructures Inrecent years micro and nanowire antenna have been investigated to explore this aspect however most of these investigations are confined to plasmonic nanostructures Thereare few concerns heating and propagation loss CMOS compatibility efficiency andflexibility etc associated with conventional plasmonic materials therefore organicnanostructures have been explored as an alternative candidates for photonic applications To utilize organic nanostructures for signal processing devices both in active andpassive domains it is imperative to investigate directional emission of out coupled photons Additionally it is vital to study the influence of plasmonic dielectric coupling ondirectional emission of the individual organic nanostructures To address all these issues herein we explore the directional emission from one dimensionalorganic nanostructures in different operational regime We further extendour investigation on the influence of dielectric microstructure coupling for directing theout coupled photon emission and demonstrate how to use dielectric microsphere as anactive element for tuning the spectral feature of out coupled photon Moreover wevertically couple organic nanowire 1D with plasmonic substrate 2D to efficientlychannelling of exciton polaritons to a leaky plasmonic substrate Finally we newline newline