KEYWORDS: Electromagnetism, Electromagnetic scattering, Silicon, Scattering, Signal detection, Refractive index, Particles, Thallium, Sensors, Near field
An inverse design in electromagnetic method based on the topological derivative approach is presented. Topological derivative method is used to measure the sensitivity of a given functional with respect to an infinitesimal perturbation in a domain. The topological derivative concept has been successfully applied in many relevant fields such as geophysics, multi-scale material design and inverse problems. In this work, to design the electromagnetic devices an objective function dependent on the scattering parameters is considered. Finally, numerical results are presented to illustrate the performance of the optimisation approach.
KEYWORDS: Diamond, Chemical species, Absorption, Quantum physics, Thin films, Signal to noise ratio, Signal detection, Sensors, Microwave radiation, Tolerancing
Nitrogen-vacancy (NV) pair in diamond has been widely investigated due to its profound quantum properties even at relatively higher temperature compared with those materials having to satisfy strict cryogenic conditions to display quantum states. Spin properties of NV center in diamond can be tuned by external electromagnetic radiations, which leads to its application in detecting microwave signals. Here in this work, density functional theory (DFT) method has been used to analyze electronic properties of diamond with NV centers with the aim of utilizing it for detecting very weak microwave radiations from electron cryotron radiations, to ultimately determine neutrino mass.
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