▎ 摘　　要

We present a numerical study of the effect of in-plane uniaxial strain on the photoconductivity of graphene, where special attention is paid to the dependences of the photoconductivity on the direction of the strain, the strength of the strain, and the polarization direction in lineally polarized light irradiated perpendicularly to graphene. Our calculations showed that the anisotropic feature of the photoconductivity predicted for unstrained graphene is strongly modulated by applying strain. In particular, it was found that the estimation of anisotropy factors, defined by the ratio between the diagonal conductivities along the strain direction for two different light polarizations theta(p) = 0 and pi/2 relative to the strain axis, enables us to not only determine the strain ratio but also obtain information about the crystal orientation along which the strain is applied. (C) 2014 The Japan Society of Applied Physics