Berlin 2012 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 77: Quantum Dots and Wires: Optical Properties II (mainly Luminescence and Electronic Structure)
HL 77.8: Talk
Thursday, March 29, 2012, 11:15–11:30, EW 203
Computational characterisation of optical properties of CdSe nanostructures — •Farzana Aslam1 and Christian von Ferber1,2 — 1Applied Mathematics Research Centre, Coventry University, UK — 2Physikalisches Institut, University Freiburg
Quantum dots have numerous potential applications1 because their optical and electronic properties can be readily tuned by varying their size, shape, structure and composition. Rational engineering of optoelectronic devices is enabled by high quality, highly monodisperse and trap-free nanoparticles. The main focus of experimental and theoretical research on nanoparticles so far has been on the properties resulting from the quantum confinement effect and still there are many unanswered questions about the fundamental properties of nanoparticles and their surfaces.
We report the systematic investigations of the optical, electrostatic and structural trends of nanostructures using empirical potentials, dynamical simulations, time *dependent density functional theory and non-linear regime. The stability and properties of the structure of the nanostructure are studied as a function of the size, shape, structure and surface of the nanostructures. Furthermore the optical properties of different nanostructures as a result of laser matter interaction are also investigated.
[1] F. Aslam , D.J.Binks , M.D.Rahn, D.P.West, P.O*Brien , N.Pickett and S.Daniels , J.Chem. Phys,122 , 184713 (2005) [2] F. Aslam and C.von Ferber ; Shape dependent properties of CdSe nanostructures, Chemical Physics