Optimization of Polarization-Independent Chand-Bali Nano-antenna for Energy Harvesting

We propose a novel Chand-Bali nano-antenna that uses a gradient-based optimization method to achieve polarization-independent operation in the infrared range, specifically at 10.6 μm. The optimized design allows for wide-angle reception. The nano-antenna is made up of two elliptical metallic resonators, one of which has an elliptic cut. It serves as the top layer of a metal-insulator-metal (MIM) structure, which allows for easy formation of thin insulator layers in the gap of the metallic resonators, creating an infrared energy harvester rectenna. The strong confinement of the electric field in the gap improves the performance of MIM rectifiers. Our simulations indicate that this design is well suited for energy harvesting and detection, and can be scaled to different wavelengths.