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Spin response in nonlocal nonlinear optics |
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| Authors: | Torsten Andersen Ole Keller Wolfgang Hübner Brje Johansson |
| Institution: | a Condensed Matter Theory Group, Department of Physics, Ångström Laboratory, Uppsala University, Box 530, S-751 21, Uppsala, Sweden b Institute of Physics, Aalborg University, Pontoppidanstrœde 103, DK-9220, Aalborg Øst, Denmark c Department of Physics, Kaiserslautern University, Box 3049, D-67653, Kaiserslautern, Germany |
| Abstract: | A novel effect of the electron spin in nonlinear optics is predicted. Starting from the Pauli Hamiltonian, we present the influence of the electron spin on the nonlinear optical response of a homogeneous electron gas in the low temperature limit. It is shown that the longitudinal second-harmonic response which results from a transverse incoming field differs significantly from the usual paramagnetic response when spin effects are included. The calculation is done both with and without screening. |
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