Implementation of Optimal Thermal Radiation Pumps Using Adiabatically Modulated Photonic Cavities

We numerically implement the concept of thermal radiation pumps in realistic photonic circuits and demonstrate their efficiency to control the radiation current, emitted between two reservoirs with equal temperature. The proposed pumping scheme involves a cyclic adiabatic modulation of two parameters that control the spectral characteristics of the photonic circuit. We show that the resulting pumping cycle exhibits maximum radiation current when a cyclic modulation of the system is properly engineered to be in the proximity of a resonance degeneracy in the parameter space of the photonic circuit. A developed Floquet scattering framework, which in the adiabatic limit boils down to the analysis of an instantaneous scattering matrix, is offering an engineering tool for designing and predicting the performance of such thermal pumps. Our predictions are confirmed by time-domain simulations invoking an adiabatically driven photonic cavity.Fil: Fernández, Lucas Jonatan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Modelado e Innovación Tecnológica. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Instituto de Modelado e Innovación Tecnológica; ArgentinaFil: Li, Huanan. City University of New York; Estados UnidosFil: Nafari, Mona. Wesleyan University; Estados UnidosFil: Kottos, Tsampikos. Wesleyan University; Estados Unido

Metallic Plasmonic Nano-antenna for Wireless Optical Communication in Intra-body Nanonetworks

Nanonetworks consist of nano-sized communicating devices which are able to perform simple tasks at the nanoscale. Nanonetworks are the enabling technology for unique applications, including intra-body health-monitoring and drug delivery systems. In this paper, metallic plasmonic nano-antennas for wireless optical communication in intra-body nanonetworks are modeled and analyzed. More specifically, a unified mathematical framework is developed to investigate the performance in reception of gold-based nano-dipole antennas. This framework takes into account the metal properties, i.e., its dynamic complex conductivity and permittivity; the propagation properties of Surface Plasmon Polariton waves on the nano-antenna, i.e., their confinement factor and propagation length; the antenna geometry, i.e., length and radius, and the antenna fundamental resonance frequency, and it can be utilized to obtain the plasmonic currents on the nano-antenna generated by an incident EM filed. In addition to numerical results, the analytical models are validated by means of simulations with COMSOL Multi-physics. The developed framework will guide the design and development of novel nano-antennas suited for wireless optical communication in intra-body nanonetworks