Search Results for Ali K. Khaleel

Abstract

In this work, we do a comprehensive examination of the mechanisms of magneto-optical amplification in silicon nanostructured photodetectors, including laser-assisted fabrication and coupling with an external magnetic field. The performance of photodetectors is improved by the crystallinity of Au@Pb core-shell nanoparticles being greatly improved by pulsed laser ablation in liquid (PLAL) under magnetic field. The experimental results demonstrate that the responsivity is enhanced from 0.220 A/W to 0.445 A/W at 550 nm with an external quantum efficiency (EQE) of 95% and a specific detectivity of 2.1 × 1013 Jones with the applied magnetic field of 0.3 T. The primary physical processes are the change of hot electron trajectories by Lorentz force, giant magnetoresistance (GMR) in hybrid metal-semiconductor devices and the Purcell enhancement in magneto-dielectric nanostructures. This work offers the theoretical and practical framework for next-generation silicon-compatible magneto-optical detectors for quantum sensing, optical magnetometry and weak-signal detection