Fabricate diamond nanowire based on the silver nano-tip grating towards plasmon-enhanced applicaiton

Abstract

This work presents a method to fabricate the diamond nanowire at the tip of silver nano-grating which acted as the Plasmon substrates to enhance the quantum efficient of diamond NV color centers for the quantum sensors applications. Due to the well-organized silver nano-grating, the edges of colloidal diamond drop-casted on the silver nano-grating substrate have been arranged as the straightforward lines. And, the diamond nanowire would be manufactured along this line at the tip of silver nano-grating based on the coffee-ring effect. Because of the tip effect and the surface plasma resonance effect at the tip of silver nano-grating, the fluorescence and the quantum efficient have improved about 10 times. It was the potential methods to improve the sensitivity of spin-based sensors by improving the quantum efficient.