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Titolo:
Conjugated polymer lasers: emission characteristics and gain mechanism
Autore:
Wegmann, G; Schweitzer, B; Hopmeier, M; Oestreich, M; Giessen, H; Mahrt, RF;
Indirizzi:
Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany Univ Marburg Marburg Germany D-35032 eich Phys, D-35032 Marburg, Germany Univ Marburg, Inst Phys Chem, D-35032 Marburg, Germany Univ Marburg Marburg Germany D-35032 Phys Chem, D-35032 Marburg, Germany Univ Marburg, Wissensch Zentrum Mat Wissensch, D-35032 Marburg, Germany Univ Marburg Marburg Germany D-35032 Wissensch, D-35032 Marburg, Germany
Titolo Testata:
PCCP PHYSICAL CHEMISTRY CHEMICAL PHYSICS
fascicolo: 8, volume: 1, anno: 1999,
pagine: 1795 - 1800
SICI:
1463-9076(19990415)1:8<1795:CPLECA>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
STIMULATED-EMISSION; POLY(P-PHENYLENEVINYLENE) FILMS; ELECTROLUMINESCENT POLYMERS; SEMICONDUCTING POLYMERS; THIN-FILMS; LUMINESCENCE; DYNAMICS; EXCITON; DIODES; ANNIHILATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Wegmann, G Univ Marburg, Fachbereich Phys, Renthof 5, D-35032 Marburg, Germany Univ Marburg Renthof 5 Marburg Germany D-35032 arburg, Germany
Citazione:
G. Wegmann et al., "Conjugated polymer lasers: emission characteristics and gain mechanism", PCCP PHYS C, 1(8), 1999, pp. 1795-1800

Abstract

The photoluminescence emission from a conjugated polymer blend system is investigated. Line narrowing which can be attributed to amplified spontaneous emission (ASE) is observed upon increasing the excitation density. Pump-probe experiments reveal a spectrally broad positive gain, supporting this notion. The gain dynamics are investigated on a picosecond timescale. A laser based on the polymer blend system is realized by placing the material into an external resonator. The laser emission is characterized with respect to its coherence, tunability and polarization. The dependence of the laser emission on pump polarization and pump wavelength gives insight into the nature and the dynamics of the excited states involved in the lasing process. A model for the gain mechanism in conjugated polymer lasers is proposed based on our measurements.

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Documento generato il 29/11/20 alle ore 06:51:20