Tuning the lasing wavelength of dye-doped chiral nematic liquid crystal by fluid flow

ABSTRACT

The influence of hydrodynamic flow on the lasing wavelength and stability of the laser emission average power of a dye-doped chiral liquid crystalline (DDCLC) structure is studied. Multiple lasing peaks at equidistant wavelengths are observed, which are originating from multiple domains that are induced by the hydrodynamic flow of the DDCLC. A simultaneous blue shift over 4 nm for all lasing peaks is observed after increasing the flow velocity to 0.3 mm/s for cells with a thickness of 10 μm. It is observed that the CLC flow dramatically increases the stability of the laser emission compared to conventional cells because dye bleaching and LC molecular reorientation due to pumping beam is reduced.

GRAPHICAL ABSTRACT

KEYWORDS:

• Lasing
• chirality
• tuning
• flow
• fluid
• domain

Acknowledgements

The research was conducted within WEBB: Erasmus Mundus Action 2 mobility project.

Disclosure statement

No potential conflict of interest was reported by the authors.