2011
DOI: 10.1364/ome.1.001484
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Reversible phototuning of lasing frequency in dye doped cholesteric liquid crystal and ways to improve it [Invited]

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Cited by 35 publications
(21 citation statements)
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“…The reversible frequency tuning was attained using the induced CLC materials, for which the selective excitation of both stereoisomers was realised. As suggested in [64][65][66], the selective monochromatic irradiation of every stereo isomeric forms in the induced CLC based on azoxy-nematic separately is possible. The stereoisomers of azoxy-nematic ZhK-440 have the spectral well separated by absorption bands for trans-and cis-conformations that allows one to irradiate selectively (Fig.…”
Section: Phototuning Of the Lasing Frequency For Induced Clcsmentioning
confidence: 99%
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“…The reversible frequency tuning was attained using the induced CLC materials, for which the selective excitation of both stereoisomers was realised. As suggested in [64][65][66], the selective monochromatic irradiation of every stereo isomeric forms in the induced CLC based on azoxy-nematic separately is possible. The stereoisomers of azoxy-nematic ZhK-440 have the spectral well separated by absorption bands for trans-and cis-conformations that allows one to irradiate selectively (Fig.…”
Section: Phototuning Of the Lasing Frequency For Induced Clcsmentioning
confidence: 99%
“…12). For making the induced CLC, the twisting additive Ɇ5 from a mixture of cholesterol esters without stereoisomers was used [67][68]. For the dye doping of CLC, pyrromethene PR 597 and phenolenone dye F490 were used, both with a fluorescence quantum yield of more than 50%.…”
Section: Phototuning Of the Lasing Frequency For Induced Clcsmentioning
confidence: 99%
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“…The last process, photocontrolling of helical pitch, is of particular interest due to the remote, spatial, and temporal activation advantages of light stimulus. The method of tuning the lasing frequency based on this effect, which more generally is seen as a method of controlling light by means of light, is considered the most promising in terms of the above requirements of the process of tuning [4].Variation of the helical pitch under the influence of light is due to a change in the helical twisting power of chiral molecular switches in CLCs as a result of the photoconversion of molecules of the chiral dopant (ChD) [5-9], or liquid crystal host [10][11][12][13]. Often, these phototransformations (photo-Fries reaction, photolysis reaction, etc.)…”
mentioning
confidence: 99%
“…An unfortunate combination of these factors in many systems previously used may explain the rather small number of works on the reversible phototuning of the lasing frequency of CLC lasers. These works are mainly related to systems based on photosensitive nematic matrices from the class of azo and azoxy compounds [10,12,13] and, to a lesser extent, CLCs based on chiral azo dopants [7]. However, the dynamic characteristics of such systems are far from perfect.…”
mentioning
confidence: 99%