Light-induced multi-wavelength lasing in dye-doped chiral nematic liquid crystals due to strong pumping illumination. Issue 9 (15th July 2018)

• Record Type: Journal Article
• Authors: Dadalyan, Tigran; Ninoyan, Zhirayr; Nys, Inge; Alaverdyan, Roman; Beeckman, Jeroen; Neyts, Kristiaan
• Is Part Of: Liquid crystals. Volume 45:Issue 9(2018)
• Page Start: 1272
• Page End: 1278
• Publication Date: 2018-07-15
• Subjects: Lasing -- chirality -- tuning -- non-linear reorientation -- Cano–Grandjean defect lines -- domain -- light-induced reorientation; Liquid crystals -- Periodicals; 548.905
• DOI: 10.1080/02678292.2018.1429680
• Languages: English
• ISSNs: 0267-8292

Abstract

ABSTRACT: The influence of the pump laser beam on the lasing spectral characteristics in dye-doped cholesteric liquid crystal is investigated. Under the influence of the pump laser pulses with different repetition rates and energies, non-linear reorientation and light-induced flow reorientation of chiral nematic liquid crystals (CLC) molecules was observed. Independent of the reorientation mechanism, multi-wavelength lasing was achieved due to stepwise uncoiling of the CLC structure. Under the influence of a pump laser beam with low repetition rate, Cano–Grandjean disclination defect lines were induced which remain even after removal of the laser beam. Graphical Abstract: