6 papers
Third order susceptibility: general formalism for photoinduced current density in semiconductors
M. Combescot, O. Betbeder-Matibet
This paper contains a detailed derivation of the photoinduced current density at third order in the coupling between a semiconductor and a multifrequency photon field, starting fro…
On the dark nature of exciton Bose-Einstein condensate
Monique Combescot, Michael N. Leuenberger
We show that for the very same reason that excitons are bright, i.e. coupled to photons, they have a higher energy than dark excitons, even for electrons spatially separated from h…
A predicted "Faraday oscillation" in photoexcited semiconductors
M. Combescot, O. Betbeder-Matibet
While, for semiconductors photoexcited by a circularly polarized pump, the polarization plane of a linearly polarized probe has been shown to rotate, we here predict a spectacular…
Shiva diagrams for composite-boson many-body effects : How they work
M. Combescot, O. Betbeder-Matibet
The purpose of this paper is to show how the diagrammatic expansion in fermion exchanges of scalar products of -composite-boson (``coboson'') states can be obtained in a practic…
Major difference between true bosons and "proteons"
M. Combescot, O. Betbeder-Matibet
We call "proteons" -- from the ever-changing greek sea-god -- composite particles made of two fermions. Among them, are the semiconductor excitons, but also variou…
The trion as an exciton interacting with a carrier
M. Combesccot, O. Betbeder-Matibet
The X trion is essentially an electron bound to an exciton. However, due to the composite nature of the exciton, there is no way to write an exciton-electron interaction potent…