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Laser threshold reduction in an all-spiro guest–host system
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10.1063/1.1792794
/content/aip/journal/apl/85/10/10.1063/1.1792794
http://aip.metastore.ingenta.com/content/aip/journal/apl/85/10/10.1063/1.1792794
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Chemical structure of the spiro derivatives 2,7-bis(biphenyl-4-yl)--di-tert-butyl-9,-spirobifluorene (host) and Spiro-DPVBi (guest) and photoluminescence spectrum of the host and absorption spectrum of the guest material.

Image of FIG. 2.
FIG. 2.

ASE and photoluminescence spectra for different doping concentrations.

Image of FIG. 3.
FIG. 3.

Laser emission spectra for different grating periods of second-order DFB lasers and photoluminescence spectra for the bulk material (dashed line), both normalized to unity for a pure film of the guest material (a) and for a doping concentration of 1.1% (b).

Image of FIG. 4.
FIG. 4.

Effective refractive indices for pure host material (0%), pure guest material (100%), and a doped system of 1.1% (a); and the corresponding laser threshold energy densities (b).

Image of FIG. 5.
FIG. 5.

Laser emission spectra for different grating periods of first-order DFB lasers with a doping concentration of 1.1 % (a) and characteristics of a first-order laser with a grating period (b).

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/content/aip/journal/apl/85/10/10.1063/1.1792794
2004-09-13
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Laser threshold reduction in an all-spiro guest–host system
http://aip.metastore.ingenta.com/content/aip/journal/apl/85/10/10.1063/1.1792794
10.1063/1.1792794
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