Orienting Influence of Femtosecond Pulses on Nematic Liquid Crystals

Liquid crystalline and nonlinear optical properties of bent-shaped compounds derived from 3,4′-biphenylene

“…NLO activity and cis-trans photoisomerization) [12][13][14][15] as well as for liquid crystals. 16,17 Curiously, the pioneering bent-core mesogens, prepared a long time ago by Vorla ¨nder and Apel 18,19 and further revised by Pelzl et al, 6 were azoxy compounds. Given this background the materials discussed here are both new and previously reported 20 azo and azoxy compounds.…”

Three-dimensional imaging of chemical bond orientation in liquid crystals by coherent anti- Stokes Raman scattering microscopy

“…[23] As shown by Enikeeva et al, short-pulsed (femtosecond) laser irradiation causes director reorientation comparable to that caused by the CW irradiation at the same average power, suggesting that the pulse width is not the most critical parameter for this effect. [24] To address the issue directly, the beams were focused in the middle plane of the 20 μm E7 cell, i.e. at the location where the surface anchoring forces responsible for the uniform planar director orientation ˆ n =(1,0,0) are the weakest.…”

Selfaction effects of femtosecond laser pulses in dye-doped 5CB liquid crystal

“…In [8] it was found that the interaction of train of femtosecond laser pulses with transparent NLC is of orientational nature and the nonlinear response to the femtosecond radiation was close to the response to CW radiation. Direct experimental comparative study of transparent and dyedoped NLC [9] showed that in the case of dye-dopants the influence of femtosecond pulses proved to be less effective than that of CW radiation.…”