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Tunable Optical Gain from Soluble Thiophene-Based Oligomers

Published online by Cambridge University Press:  21 March 2011

M. Anni ,
G. Gigli ,
M. Zavelani-Rossi ,
C. Gadermaier ,
G. Lanzani ,
G. Barbarella ,
L. Favaretto  and
R. Cingolani
M. Anni
Affiliation:
Istituto Nazionale Fisica della Materia (INFM), Dip. Ingegneria dell'Innovazione, Università di Lecce, Via per Arnesano, 73100 Lecce, ITALY
G. Gigli
Affiliation:
Istituto Nazionale Fisica della Materia (INFM), Dip. Ingegneria dell'Innovazione, Università di Lecce, Via per Arnesano, 73100 Lecce, ITALY
M. Zavelani-Rossi
Affiliation:
Dip. Fisica, Politecnico di Milano, Piazza L. Da Vinci 32, 20133 Milano, ITALY
C. Gadermaier
Affiliation:
Dip. Matematica e Fisica, Università di Sassari, Via Vienna 2, 07100 Sassari, ITALY
G. Lanzani
Affiliation:
Dip. Fisica, Politecnico di Milano, Piazza L. Da Vinci 32, 20133 Milano, ITALY
G. Barbarella
Affiliation:
Consiglio Nazionale delle Ricerche (CNR), ICOCEA, Area della Ricerca di Bologna, Via Gobetti 101, 40129 Bologna, ITALY
L. Favaretto
Affiliation:
Consiglio Nazionale delle Ricerche (CNR), ICOCEA, Area della Ricerca di Bologna, Via Gobetti 101, 40129 Bologna, ITALY
R. Cingolani
Affiliation:
Istituto Nazionale Fisica della Materia (INFM), Dip. Ingegneria dell'Innovazione, Università di Lecce, Via per Arnesano, 73100 Lecce, ITALY
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Abstract

Tunable optical gain is demonstrated, through pump and probe measurements, in spin coated neat films of soluble S,S-dioxide oligothiophenes with different functionalization pattern. The molecular functionalization with alkyl and aryl groups allows us to obtain photoluminescence efficiency up to 70%, good chemical stability, high solubility and tunable gain along the visible range from 470 nm to 660 nm. The gain cross section is up to 9*10-18 cm2. The gain relaxation dynamic is studied through time resolved pump and probe measurements. A comparison with some of the best organic materials for laser application is presented. From these results we conclude that thienyl-S,S-dioxide oligothiophenes are interesting materials for applications to organic lasers and amplifiers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 665: Symposium C – Electronic, Optical and Optoelectronic Polymers and Oligomers , 2001 , C1.5
Copyright
Copyright © Materials Research Society 2001

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References

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