▎ 摘　　要

The optical properties of the armchair graphene nanoribbons (AGNRs) under the uniaxial strain are studied within a non-orthogonal tight binding mode. For 9 AGNR and 10 AGNR, the first transition energy E11 increases and the second one E-22 decreases when the uniaxial strain increases. And for 10-AGNR there is a crossover for the two transition energies under the uniaxial strain. While for 11-AGNR, the E-11 transition energy decreases firstly and then increases and the E-22 transition energy increases when the uniaxial strain increases. Interstingly, there is a semiconductor-metal transition for 11-AGNR with increasing strain. These variation of the optical transition energies can be used a supplemented tool to detect the deformation degree of an AGNR under the uniaxial strain. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim