Towards electrically‐pumped microcavity polariton lasers

Abstract

The rigid backbone of the poly(3‐butylthiophene) molecule adopts a perpendicular orientation with respect to the substrate by using a solvent‐vapor treatment (see figure). Small and closely contacting spherulites instead of conventional whisker‐like crystals are achieved. This could be utilized to improve charge‐carrier mobility particularly in the direction normal to the film plane by designing and constructing thick crystalline domains in the functional layer.

Room temperature GaAs exciton-polariton light emitting diode

“…To minimize the effects of the doping-related losses inside the cavity, the inner half period of each DBR was kept undoped. 21 Polariton LEDs were fabricated by using standard GaAs processing technology. In order to reduce the series resistance of the top p-DBR, the p-contacts are deposited following an Ohmic recess step.…”