Dresden 2011 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 44: Poster Session I

HL 44.7: Poster

Dienstag, 15. März 2011, 18:00–21:00, P3

Optical Transitions in the Charged NV⁻-Center in Diamond — •Florian Hilser and Guido Burkard — University of Konstanz

The electronic configuration of the NV⁻-center in diamond is well known from spectroscopic data and the electronic states are established theoretically by linear combination of sp³-hybridized dangling bonds forming p-like orbitals [1]. Spin-orbit interaction and strain lead to orbital symmetry-breaking and the degeneracy of the electronic states is lifted. The ordering of energy levels is determined using group theoretical considerations [2]. Furthermore the energies of the degenerate spin-triplet-states can be split by applying a magnetic field. We determine the electric dipole matrix elements for optical excitation and derive an effective Hamiltonian for optically induced spin-flip transitions.

[1] A. Lenef, S. Rand, Phys. Rev. B 53, 13441 (1996).

[2] J. R. Maze, A. Gali, arXiv 1010.1338v1.