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. Following our p...

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...

Absorption in bulk semiconductors. Part 1: electronic excitation — by Guillermo F. Quinteiro on

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We predict new electronic phenomena in bulk semiconductors excited by twisted light. I will show, in part 1, how the excited state of electr...

Electronic states in semiconductors — by Guillermo F. Quinteiro on

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We review basic concepts on semiconductors physics that will help us to understand future posts. Detailed accounts can be found in several t...

Research groups — by Guillermo F. Quinteiro on

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Around 2009 the first articles in twisted-light--solid interaction were published. Since then new groups have become involved in the topic a...

Generating twisted light — by Guillermo F. Quinteiro on

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One of my first thoughts about twisted light was "It must be very difficult to generate twisted light in the lab!". Talking to oth...

Neglecting the linear momentum of photons — by Guillermo F. Quinteiro on

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It is a common practice to neglect the linear moment of photons of conventional (non-twisted) beams in their interaction with matter. Though...