A finite density-dependent plasmon pole is observed in the inverse dielectric response function of a two-dimensional electron gas by THz-spectroscopy. A microscopic many-body theory explains the experimental results.
© 2009 The Optical Society
T. Grunwald, S. Chatterjee, K. Pierz, D. Golde, M. Kira, and S. W. Koch, "Terahertz Signatures of Plasmons in a Two-Dimensional Electron Gas," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, OSA Technical Digest (CD) (Optical Society of America, 2009), paper IThC4.
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