Publications by authors named "Haris Naeem Abbasi"
Nitrogen impurity has been introduced in diamond film to produce a nitrogen vacancy center (NV center) toward the solvated electron-initiated reduction of N to NH in liquids, giving rise to extend the wavelength region beyond the diamond's band. Scanning electron microscopy and X-ray diffraction demonstrate the formation of the nanocrystalline nitrogen-doped diamond with an average diameter of ten nanometers. Raman spectroscopy and PhotoLuminescence (PL) spectrum show characteristics of the NV and NV charge states.
View Article and Find Full Text PDFIn this study, to fabricate diamond concave microlenses in a simple manner, an approach that combines a spin coating process with subsequent dry etching was demonstrated. First, photolithography was used to produce cylindrical holes in the photoresist layer on the diamond surface. Then, another photoresist was spin coated to fill the holes, and the concave structures with meniscus shapes were then obtained because of centrifugal force and interfacial tension.
View Article and Find Full Text PDFArticle Synopsis
- - A ZnO/diamond structure UV photodetector was created by depositing ZnO films of 50 and 100 nm thickness on diamond substrates using a sputtering technique.
- - The photodetector's photocurrent gain in the UV range was significantly influenced by the thickness of the ZnO films, achieving gains of 14.3 A/W and 308 A/W for the 50 nm and 100 nm films, respectively.
- - Peak responsivities for both film thicknesses occurred at 270 nm, with additional shoulder peaks noted at 240 nm and 290 nm, likely corresponding to properties of the diamond and ZnO materials.