Organic copolymer lasing from single defect microcavity fabricated using laser patterning

Claronino, Peter; Jayaprakash, Rahul; Jessewitsch, Till; Kilbride, Rachel C.; Thornber, Timothy; Muravitskaya, Alina; Oliver, Robert D.J.; Scherf, Ullrich; Bouillard, Jean Sebastien G.; Adawi, Ali M.; Lidzey, David G.

Abstract

Reducing the lasing threshold in optically pumped organic lasers is a necessary component of the drive to develop an organic laser diode, as this may help mitigate the losses associated with electrical contacts and charge injection. In this study we show how increasing the binaphthyl (BN) spacer content in polydioctylfluorene (PFO) decreases its amplified spontaneous emission threshold (ASE) through the suppression of intermolecular interactions. Using co-polymers with low lasing thresholds, we use a laser patterning technique to fabricate physical defects (having a diameter of ∼2.5 μm) within a vertical microcavity. Such defects create additional lateral confinement, with this approach allowing us to reduce the lasing threshold from 11 μJ cm−2 to 7 μJ cm−2 and increase cavity Q-factor from 495 (planar cavity) to 2300. The enhanced performance and the stack structure of the defect microcavity show it is a promising architecture for an electrically-pumped laser device.

Citation

Claronino, P., Jayaprakash, R., Jessewitsch, T., Kilbride, R. C., Thornber, T., Muravitskaya, A., Oliver, R. D., Scherf, U., Bouillard, J. S. G., Adawi, A. M., & Lidzey, D. G. (2023). Organic copolymer lasing from single defect microcavity fabricated using laser patterning. Journal of Materials Chemistry C, https://doi.org/10.1039/d2tc05360h

• Journal Article Type: Article
• Acceptance Date: Mar 10, 2023
• Online Publication Date: Mar 24, 2023
• Publication Date: Mar 24, 2023
• Deposit Date: Mar 26, 2023
• Publicly Available Date: Mar 27, 2023
• Journal: Journal of Materials Chemistry C
• Print ISSN: 2050-7526
• Electronic ISSN: 2050-7534
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1039/d2tc05360h
• Keywords: Materials Chemistry; General Chemistry
• Public URL: https://hull-repository.worktribe.com/output/4251291