Abstract

The magneto-opticalabsorption spectra of -stacked bilayer graphene (AABG) exhibit two kinds of absorption peaks resulting from two groups of Landau levels(LLs). Only intragroup excitations that follow a single selection rule take place. The excitation channels are altered as the field strength approaches a critical strength. These optical properties can be comprehended by the characteristics of the LL wave functions. A comparison of AABG and -stacked bilayer graphene (BBG) demonstrates that the optical properties are dominated by the stacking symmetry. The presented results could offer a way to distinguish AABG from BBG and monolayer graphene.