Real-time observation of ripple structure formation on a diamond surface under focused ion-beam bombardment

摘要

Ripple structures on a diamond surface are created and imaged in real time by focused ion-beam bombardment, and further examined by atomic force microscopy. Beyond a critical incidence angle depending on the ion energy, a ripple structure emerges, and its wavelength remains constant until it breaks down at similar to 75 degrees. The wavelength is independent of the ion flux, but increases linearly with energy. Addition of a conjectured term representing the redistribution of ion-induced surface species to Makeev, Cuerno, and Barabisi's equation allows a quantitative description of the wavelength dependence on the incidence angle.