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Electronic control of nonresonant random lasing from a dye-doped smectic liquid crystal scattering device
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10.1063/1.1885169
/content/aip/journal/apl/86/14/10.1063/1.1885169
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/14/10.1063/1.1885169
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The optical texture of the thick sample for different applied electric field strengths in the phase at . These pictures show a portion of the cell viewed between crossed polarizers. The sequence of photomicrographs are for (a) (pseudo-planar), (b) (scattering), (c) (homeotropic) on increasing the field strength, and (d) (scattering) on reducing the applied field from the field induced homeotropic texture. (e) The transmitted intensity as a function of an applied a.c. electric field with a frequency of .

Image of FIG. 2.
FIG. 2.

(a) A plot of the peak intensity of the emission spectrum (closed squares) and the FWHM (open triangles) as a function of excitation energy for the controlled scattering texture of a dye-doped phase contained in a film. The scattering texture was prepared using an applied a.c. electric field of first to obtain a homeotropic texture and then to obtain the scattering texture upon transition from the field induced homeotropic alignment. (b) Emission spectra measured using a high resolution spectrometer at an excitation energy of .

Image of FIG. 3.
FIG. 3.

A plot of the emission spectra for three different SmA textures for an excitation energy of . Figure (a) is the emission spectrum for the pseudo-planar aligned texture with a zero-field while (b) is the emission spectrum for a homeotropic alignment obtained using a a.c. electric field. Figure (c) is the emission spectrum for the dynamic scattering state obtained by applying a electric field of directly after the homeotropic state.

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/content/aip/journal/apl/86/14/10.1063/1.1885169
2005-03-30
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electronic control of nonresonant random lasing from a dye-doped smectic A* liquid crystal scattering device
http://aip.metastore.ingenta.com/content/aip/journal/apl/86/14/10.1063/1.1885169
10.1063/1.1885169
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