Optically rewritable ferroelectric liquid-crystal grating Y. Ma, J. Sun, A. K. Srivastava, Q. Guo, V. G. Chigrinov and H. S. Kwok EPL, 102 2 (2013) 24005 Published online: 08 May 2013 DOI: 10.1209/0295-5075/102/24005