modal decomposition and the interaction with bulk — by Guillermo F. Quinteiro on

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Twisted light can be represented by a superposition of plane-waves. And instead of calculating the light-matter interaction using a Bessel o...

Search for spin-polarized photoemission from GaAs using light with orbital angular momentum — by Guillermo F. Quinteiro on

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The Gay Group at the University of Nebraska wishes to improve state-of-the-art sources of polarized electrons which use circularly polarized...

Below-bandgap excitation. Part 2: excitation by twisted light — by Guillermo F. Quinteiro on

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In this second part we will apply what we learned before to study the case of excitation by twisted light below the bandgap.

Below-bandgap excitation in bulk. Part 1: Excitons produced by plane waves — by Guillermo F. Quinteiro on

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The excitation of a bulk semiconductor with light whose energy is lower than the bandgap energy produces bound electron-hole quasi-particles...

Absorption in bulk semiconductors. Part 3: complex patterns of electric currents — by Guillermo F. Quinteiro on

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The complex electric-field patterns of twisted light are imprinted in the semiconductor as complex electric currents that depend on the ampl...

Absorption in bulk semiconductors. Part 2: transfer of orbital angular momentum — by Guillermo F. Quinteiro on

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In the last post we have seen that, under the effect of twisted light, electrons are excited to non-trivial superposition states in the cond...