Chemphyschem. 2014 Dec 01;15(17):3805-8. doi: 10.1002/cphc.201402492. Epub 2014 Sep 18.

Strong coupling and laser action of ladder-type oligo(p-phenylene)s in a microcavity.

Chemphyschem : a European journal of chemical physics and physical chemistry

Michael Höfner, Björn Kobin, Stefan Hecht, Fritz Henneberger

PMID: 25234768 DOI: 10.1002/cphc.201402492

Abstract

We investigate the coupling of ladder-type quarterphenyl to the photon modes of a dielectric ZrOx /SiOx microcavity at ultraviolet wavelengths. For a relatively long cavity (≈10 μm) with high-reflectivity mirrors (0.998), optically pumped laser action is demonstrated in the weak-coupling regime. We observe single-mode operation with a threshold of 0.4 mJ cm(-2) . Strong coupling is achieved by using a short λ/2 cavity. We find pronounced anti-crossing features of the molecular (0,0) and (0,1) vibronic transitions and the cavity mode in angle-dependent reflectivity measurements providing Rabi splittings of (90±10) meV. All these features occur spectrally resonant to the exciton transition of ZnO demonstrating the potential of ladder-type oligo(p-phenylene)s for the construction of inorganic/organic hybrid microcavities.

© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: coupling; lasing molecules; microcavity; phenylenes; strong coupling

Publication Types

• Journal Article