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arXiv · 0807.4513

Theory of the optical absorption of light carrying orbital angular momentum by semiconductors

G. F. Quinteiro·P. I. Tamborenea
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Abstract

We develop a free-carrier theory of the optical absorption of light carrying orbital angular momentum (twisted light) by bulk semiconductors. We obtain the optical transition matrix elements for Bessel-mode twisted light and use them to calculate the wave function of photo-excited electrons to first-order in the vector potential of the laser. The associated net electric currents of first and second-order on the field are obtained. It is shown that the magnetic field produced at the center of the beam for the $\ell=1$ mode is of the order of a millitesla, and could therefore be detected experimentally using, for example, the technique of time-resolved Faraday rotation.

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G. F. Quinteiro, P. I. Tamborenea. 2008-07-28. Theory of the optical absorption of light carrying orbital angular momentum by semiconductors. https://doi.org/10.1209/0295-5075/85/47001

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