Finite difference time domain simulation of arbitrary shapes quantum dots Elyas Parto, Ghasem Rezaei, Ahmad Mohammadi Eslami and Tahmineh Jalali Eur. Phys. J. B, 92 11 (2019) 246 Published online: 11 November 2019 DOI: 10.1140/epjb/e2019-100410-9