Article ID Journal Published Year Pages File Type
1547583 Physica E: Low-dimensional Systems and Nanostructures 2006 4 Pages PDF
Abstract
Linear light absorption of 2D electrons confined within a biased quantum well is studied theoretically. We demonstrate that for light polarization perpendicular to the 2D plane, in addition to conventional absorption peak at frequency ℏω≈Δ, where Δ is the intersubband energy distance, there exists a peak around a double frequency ℏω≈2Δ. This additional peak is entirely due to electron-electron interactions, and corresponds to excitation of two electrons by one photon. The magnitude of two-electron absorption is proportional to U2, where U is the applied bias.
Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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