Quasi-3D nanoplasmonic structures are investigated, and the interaction of cavity and surface plasmon modes in Au cylindrical channels is discussed. By fastidious choice of geometrical parameters, it is shown that localized surface plasmon resonances (LSPR) inside the channels are established and are highly sensitive to changes in the local dielectric environment. In this study, cylindrical channels are added to the surface of gold nanopillars whose geometry otherwise permits LSPR. The inclusion of the channels creates a plasmonic waveguide supporting whispering gallery mode (WGM) cylindrical channel plasmons, which result from the coupled hybridized field. FDTD simulations reveal the possibility of single-molecule sensitivity of these cylindrical channel nanopillars (CCNP) by demonstrating near-IR wavelength shifts in the detected reflectance from a modeled array of CCNPs in various dielectric environments. The reported sensitivity of this metamaterial provides a platform for SPR single-molecule studies and exhibits potential for label-free biological and chemical sensing.
An optical induction generator is designed and tested to determine the feasibility of using radiometric forces for
renewable energy applications. Through modifications with electromagnetic induction components Crooke's
radiometer is transformed into an electric generator. Initial designs allow for the variation in the orientation and
numbers of magnetic poles as well as the characteristics of the armature (number of turns, wire gauge, location).
Prototype devices are analyzed to obtain proof-of-concept. Verification is achieved by real time variation of incident
electromagnetic energy directly corresponding to angular frequency of the generator and the characteristics of the
produced EMF waveform. I-V characteristic curves illustrate the generator performance. Radiometric generators with
two and four magnetic poles are shown to produce alternating current (AC) signals, on the order of millivolts, which
vary linearly in both amplitude and frequency in respect to the rotational frequency of the radiometric generators.