Journal
MOLECULES
Volume 26, Issue 19, Pages -Publisher
MDPI
DOI: 10.3390/molecules26196089
Keywords
cholesteric liquid crystals; chirality; photonic band gap; polymer layer; defect modes; laser dye; lasing; geometric phase
Funding
- Ministry of Science and Higher Education of the Russian Federation [FZNS-2020-0003, 0657-2020-0003]
- Science Committee of Armenia [20TTSG-1C008]
Ask authors/readers for more resources
This paper investigates the lasing possibilities of a dye-doped polymer layer embedded in a wedge-shaped CLC, showing that multimode laser generation is possible due to the observation of multiple defect modes. Simulations based on a wide range of CLC thickness demonstrate both periodic and continuous generation of defect modes along specific spectral lines. The robust spectral behavior of induced defect modes is unique and has not been observed in similar CLC-based structures.
Cholesteric liquid crystals (CLCs) with induced defects are one of the most prominent materials to realize compact, low-threshold and tunable coherent light sources. In this context, the investigation of optical properties of induced defect modes in such CLCs is of great interest. In particular, many studies have been devoted to the spectral control of the defect modes depending on their thickness, optical properties, distribution along the CLC, etc. In this paper, we investigate the lasing possibilities of a dye-doped polymer layer embedded in a wedge-shaped CLC. We show that multimode laser generation is possible due to the observed multiple defect modes in the PBG that enlarges the application range of the system. Furthermore, our simulations based on a Berreman 4 x 4 matrix approach for a wide range of CLC thickness show both periodic and continuous generation of defect modes along particular spectral lines inside the PBG. Such a robust spectral behaviour of induced defect modes is unique, and, to our knowledge, is not observed in similar CLC-based structures.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available