Orbital mechanism of the circular photogalvanic effect in quantum wells |
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Authors: | S A Tarasenko |
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Institution: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russia |
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Abstract: | It is shown that the free-carrier (Drude) absorption of circularly polarized radiation in quantum well structures leads to
an electric current flow. The photocurrent reverses its direction upon switching the light helicity. A pure orbital mechanism
of such a circular photogalvanic effect is proposed that is based on the interference of different pathways contributing to
light absorption. Calculation shows that the magnitude of the helicity-dependent photocurrent in n-doped quantum well structures corresponds to recent experimental observations.
The text was submitted by the author in English. |
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