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Volumn 98, Issue 25, 2011, Pages

A flexible organic random laser based on poly(9,9-dioctylfluorene) deposited on a surface corrugated poly-phthalate-carbonate substrate

Author keywords

[No Author keywords available]

Indexed keywords

AIR INTERFACE; POLY(9 ,9-DIOCTYLFLUORENE); RANDOM LASERS; THICKNESS FLUCTUATIONS;

EID: 79959606842     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.3601854     Document Type: Article
Times cited : (21)

References (21)
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    • We observe that the samples deposited from chloroform solution without the heating steshow PL spectra dominated by the Β -phase emission (see, Ref.). The presence of glassy phase-only PL in our samples thus confirms that the solution heating results in the irreversible dissolution of the Β -phase aggregates are initially present in the solution, even if the films are deposited by using solutions returned at room temperature (Ref.).
    • We observe that the samples deposited from chloroform solution without the heating step show PL spectra dominated by the Β -phase emission (see, Ref.). The presence of glassy phase-only PL in our samples thus confirms that the solution heating results in the irreversible dissolution of the Β -phase aggregates are initially present in the solution, even if the films are deposited by using solutions returned at room temperature (Ref.).
  • 20
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    • We observe that incoherent scattering would simply result in an increase in the photon travel time in the active materials, resulting in an ASE intensity enhancement, without the formation of narrow features. Moreover, the evidence of narrow emission peaks only in the ASE spectral region evidences that the observed effect is related to light amplification in the sample, thus excluding PL intensity modulation due to wavelength dependent scattering in the film that should be observed in all the emission range.
    • We observe that incoherent scattering would simply result in an increase in the photon travel time in the active materials, resulting in an ASE intensity enhancement, without the formation of narrow features. Moreover, the evidence of narrow emission peaks only in the ASE spectral region evidences that the observed effect is related to light amplification in the sample, thus excluding PL intensity modulation due to wavelength dependent scattering in the film that should be observed in all the emission range.


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