Eur. Phys. J. B (2013) 86: 70
https://doi.org/10.1140/epjb/e2012-30619-7

Regular Article

Possible condensation of Frenkel exciton polaritons in an organic nanofiber^*

National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

^a e-mail: inoue.junichi@nims.go.jp

Received: 16 July 2012
Received in final form: 12 November 2012
Published online: 25 February 2013

Abstract

We theoretically investigate a phase transition of Frenkel exciton polaritons in an organic nanofiber. Assuming a phenomenological Hamiltonian, we derive a mean field equation for the condensation after finding an effective action for the phenomenon using the functional integral method and stationary phase analysis. From a solution of the mean field equation, we construct a phase diagram for the condensation and highlight features that distinguish J- and H-aggregates. We also detail a connection with the superradiant phase transition, which has been studied using the Dicke model.