Optical spectroscopic investigation of m-plane GaN thin films

New spectroscopic data of erbium ions in GaN thin films

Optical properties of erbium ions in MBE-grown GaN-thin films are reported. Three types of sites were identified using site selective laser excitation. The main center is ascribed to the Er3+ ions substituted in the Ga sub-lattice while the two other centers are assigned to Er-related defects. The lifetimes of the S3/2 and I13/2 multiplets of the main center are strongly quenched with increasin...

Growth and Characterization of M-Plane GaN Thin Films Grown on γ-LiAlO2 (100) Substrates

M-plane GaN thin films were grown on LiAlO2 substrates under different N/Ga flux ratios by plasma-assisted molecular beam epitaxy. An anisotropic growth of M-plane GaN was demonstrated against the N/Ga flux ratio. As the N/Ga flux ratio decreased by increasing Ga flux, the GaN surface trended to a flat morphology with stripes along [11[Formula: see text]0]. According to high-resolution X-ray di...

Optical and structural studies of homoepitaxially grown m-plane GaN

Fabrication of MgF2-SiO2 Nanocomposite Thin Films and Investigation of Their Optical and Hydrophobic Properties

In this research, MgF2-2%SiO2/MgF2 thin films were applied on a glass substrate. At first, MgF2 thin films with the optical thickness were deposited on the glass slide substrates. Then, MgF2-2%SiO2 thin films were deposited on the glass coated with MgF2 thin films. Finally, the nanocomposite thin films were surface treated by the PFTS solution. Characterization of the thin film was done by X-Ra...

Optical Monitoring of Thin-films Using Spectroscopic Ellipsometry

Spectroscopic Ellipsometry (SE) offers a precise technique for measuring thin film properties. Advanced SE instrumentation has been demonstrated as an excellent technique for monitoring the growth of optical films for sputtering applications. We have recently extended this technique for PVD E-gun evaporated films. In this paper we will show how an SE system was integrated into a standard optica...