TY - JOUR
KW - paper
AU - José Vilhena
AU - Silvana Botti
AU - M Marques
AB - Using a first-principle approach beyond density functional theory we calculate the electronic and optical properties of small diameter CdSe nanowires. Our results demonstrate how some approximations commonly used in bulk systems fail at this nanoscale level and how indispensable it is to include crystal local fields and excitonic effects to predict the unique optical properties of nanowires. From our results, we then construct a simple model to describe the optical gap as a function of the diameter of the wire, that turns out to be in excellent agreement with experiments for intermediate and large diameters.
BT - Appl. Phys. Lett.
DO - 10.1063/1.3368126
N2 - Using a first-principle approach beyond density functional theory we calculate the electronic and optical properties of small diameter CdSe nanowires. Our results demonstrate how some approximations commonly used in bulk systems fail at this nanoscale level and how indispensable it is to include crystal local fields and excitonic effects to predict the unique optical properties of nanowires. From our results, we then construct a simple model to describe the optical gap as a function of the diameter of the wire, that turns out to be in excellent agreement with experiments for intermediate and large diameters.
PY - 2010
T2 - Appl. Phys. Lett.
TI - Excitonic effects in the optical properties of CdSe nanowires
UR - http://apl.aip.org/applab/v96/i12/p123106_s1
VL - 96, 123106
ER -