Growth and optical properties of Ag-Ti composite nanorods based on oblique angle co-deposition technique

Ag-Ti composite nanorod structures with various Ag compositions were fabricated by the oblique angle co-deposition technique, and their optical transmission spectra are tuned by composition ratios of Ag and Ti, polarization directions, and deposition angles. Such tunable optical properties have potential applications in optoelectronics. Specially, for the Ag80 composite nanorod structures, there exists a wavelength, where it is isotropic. We also show that the transmission spectra of the Ag80 composite nanorod structure for the deposition angle of 87.5° are greater than 90%, while the transmission spectra for the 75° deposition angle are lower than 20%. Utilizing such a property, high or low transmission lenses can be designed.