Physics – Condensed Matter
Scientific paper
2002-09-06
Phys. Rev. Lett. 89, 286801 (2002)
Physics
Condensed Matter
4 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.89.286801
We investigate the linear and non-linear optical response of two-dimensional (2D) interacting electron fluids confined by a strong non-parabolic potential. We show that such fluids may exhibit higher-harmonic spectra under realistic experimental conditions. Higher harmonics arise as the electrons explore anharmonicities of the confinement potential (electron-electron interactions reduce this non-linear effect). This opens the possibility of controlling the optical functionality of such systems by engineering the confinement potential. Our results were obtained within time-dependent density-functional theory, employing the adiabatic local-density approximation. A classical hydrodynamical model is in good agreement with the quantum-mechanical results.
Mehlig Bernhard
Moseler Michael
Santer Mark
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