Aufsatz in einer Fachzeitschrift
Optical amplification in spiro-type molecular glasses
Details zur Publikation
Autor(inn)en: | Salbeck, J.; Schörner, M.; Fuhrmann, T. |
Publikationsjahr: | 2002 |
Zeitschrift: | Thin Solid Films |
Seitenbereich: | 20-25 |
Jahrgang/Band : | 417 |
Erste Seite: | 20 |
Letzte Seite: | 25 |
ISSN: | 0040-6090 |
Zusammenfassung, Abstract
We present measurements of amplified spontaneous emission (ASE) in films of spiro-sexipheryl and higher branched spiro, starburst compounds of the 1st and 2nd generation. Gain narrowing is observed at threshold intensities of approximately 3.2 muJ/cm 2 when pumped with 500 ps pulses at 337 nm. A comparison of ASE peak wavelengths, linewidths and degradation kinetics in air is presented for the different spiro, compounds. The ASE lines are the 1-0 fluorescence transitions of the three compounds at 419, 428 and 443 nm, respectively, with linewidths of approximately 3 nm. The dependence of ASE threshold on film thickness is explained in terms of waveguide optics. The lowest threshold is achieved for monomode films (100-150 nm). Photodegradation effects occur in air atmospheres but can be suppressed in oxygen-free environments. (C) 2002 Elsevier Science B.V. All rights reserved.
We present measurements of amplified spontaneous emission (ASE) in films of spiro-sexipheryl and higher branched spiro, starburst compounds of the 1st and 2nd generation. Gain narrowing is observed at threshold intensities of approximately 3.2 muJ/cm 2 when pumped with 500 ps pulses at 337 nm. A comparison of ASE peak wavelengths, linewidths and degradation kinetics in air is presented for the different spiro, compounds. The ASE lines are the 1-0 fluorescence transitions of the three compounds at 419, 428 and 443 nm, respectively, with linewidths of approximately 3 nm. The dependence of ASE threshold on film thickness is explained in terms of waveguide optics. The lowest threshold is achieved for monomode films (100-150 nm). Photodegradation effects occur in air atmospheres but can be suppressed in oxygen-free environments. (C) 2002 Elsevier Science B.V. All rights reserved.
