The paper investigates asymmetries effects over a nonlinear vibration energy harvester dynamics. asymmetric system performance is compared with symmetric ones. Different asymmetry levels on restoring force and gravity action are investigated from system-sloping angle variation. Bifurcation diagrams basins of attraction used to examine the local global characteristics underlying dynamical system...

Parametric variability is inevitable in actual energy harvesters. It can significantly affect crucial aspects of the system performance, especially harvesting systems that present geometric parameters, material properties, or excitation conditions are susceptible to small perturbations. This work aims develop an investigation identify most critical parameters dynamic behavior asymmetric bistabl...

The optical properties of three-dimensional crescent-shaped gold nanoparticles are studied using a transformation optics methodology. The polarization insensitive, highly efficient, and tunable light harvesting ability of singular nanocrescents is demonstrated. We extend our approach to more realistic blunt nanostructures, showing the robustness of their plasmonic performance against geometric ...