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Mechanically tunable microlasers based on highly viscous chiral liquid crystals
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FIG. 1.

Chemical structures of the compounds: 1 – oligomer and 2 and 3 – cholesterol derivatives.

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FIG. 2.

Schematic representation of mechanically tunable lasing from (a) semi cylindrical cavity, (b) spherical cavity. 1 – pumping beam, 2 – lasing beam, and 3 – stretching force.

Image of FIG. 3.

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FIG. 3.

Lasing intensity as a function of pumping energy (straight lines show the slope of the graphs and their intersection with X axis corresponds to lasing threshold).

Image of FIG. 4.

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FIG. 4.

Shift of lasing wavelength as a function of stretching: the edge of the selective reflection band is shown above the peak.

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/content/aip/journal/apl/99/23/10.1063/1.3665943
2011-12-05
2014-04-19

Abstract

Chiral composition is designed for highly viscous lasing microemitters. The composition forms cholesteric liquid crystal and after doping with pyrromethene 597 was used as an active lasing media in stretchable aluminized silicone cavities. Optical pumping of the system led to lasing at the wavelengths defined by a degree of cavity deformation. Lasing thresholds were lower in aluminized cavity than in transparent cavity. A simple model allowing to predict the shift of lasing wavelength as a function of deformation is developed.

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Scitation: Mechanically tunable microlasers based on highly viscous chiral liquid crystals
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/23/10.1063/1.3665943
10.1063/1.3665943
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