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Lecture Hashem Zoubi


04 September 2006 FWN-Building 5113.0202, Nijenborgh 4, 9747 AG, Groningen
Speaker: Hashem Zoubi
Affiliation:Scuola Normale Superiore, Pisa, Italy
Title:Polariton-Polariton kinematic interactions and bipolaritons in organic microcavites
Date:Mon Sep 4, 2006
Location:FWN-Building 5113.0202
Host:J. Knoester
Telephone:+31 50 363 4369


We study polariton kinematic interactions in crystalline organic microcavities, in the strong coupling regime. In using the Bosonization procedure, the Frenkel excitons are transformed from free Paulions into interacting Bosons with kinematic interactions, which result within a cavity in polariton-polariton kinematic interactions. In a laterally confined microcavity, we calculate the scattering amplitude, and we obtain the effective potential for a scattering between two free polaritons. We show that the effective potential can be modulated by changing the exciton-cavity photon detuning, and we get a crossover of the effective potential from an attractive into a repulsive one. For the attractive potential case, the pole in the scattering matrix is the signature of a polariton bound state, i. bipolariton. Due to the smallness of the polariton effective mass, the obtained bound state is very shallow and appears below the minimum of the lower polariton branch.
Last modified:22 October 2012 2.31 p.m.