Excitation Density Dependence of Optical Oxygen Sensing in Poly(9, 9-dioctylfluorene) Waveguides Showing Amplified Spontaneous Emission. (4th March 2014)

• Record Type: Journal Article
• Authors: Anni, M.; Lattante, S.
• Other Names: Bhowmik P. Academic Editor.; Nassar E. J. Academic Editor.
• Is Part Of: ISRN materials science. Volume 2014(2014)
• Publication Date: 2014-03-04
• Subjects: Materials science -- Periodicals; Materials science; Periodicals; 620.11
• DOI: 10.1155/2014/856716
• Languages: English
• ISSNs: 2090-6080

Abstract

Abstract : Reversible oxygen induced emission quenching of both the Spontaneous Emission (SE) and the Amplified Spontaneous Emission (ASE) of poly(9, 9-dioctylfluorene) waveguides is demonstrated. We show that ASE shows a stronger quenching than SE, up to about 6.2 times, but also a stronger decrease when the excitation density increases. We conclude that the fast increase of the ASE decay rate is the main process in determining the ASE detection sensitivity, limiting the potentiality of sensitivity improvement of ASE with respect to SE.