Orbital angular momentum mode generation using anisotrophic liquid crystal filled capillary

Hyucksu Choi; Yongsoo Lee; Jonghee Eun; Joonwo Jung; Kyunghwan Oh

doi:10.1117/12.2616006

27 October 2021 Orbital angular momentum mode generation using anisotrophic liquid crystal filled capillary

Hyucksu Choi, Yongsoo Lee, Jonghee Eun, Joonwo Jung, Kyunghwan Oh

Proceedings Volume 11926, Optical Manipulation and Structured Materials Conference 2021; 1192609 (2021) https://doi.org/10.1117/12.2616006
Event: SPIE Technologies and Applications of Structured Light, 2021, Online, Japan

Abstract

We simulated a waveguide of an anisotropic liquid crystal(LC) in a hollow optical fiber(HOF) with O to L bands. It is known that chiral doped 5CB(4-Cyano-4'-pentylbiphenyl) under a capillary boundary condition form a double-twist selfassembly structure. Since birefringence of 5CB has a negative charge, the double-twist structure is equivalent to the graded ring core waveguide. Since optical axis of LC structure has a topological charge, LP modes split into orbital angular momentum(OAM) modes. Also the chiral asymmetry of the waveguide made the nonzero OAM mode to be the highest effective index. To ensure purity of mode, OAM of each modes were calculated and compared with the degree of phase rotation. Dispersion of the modes were also calculated.

Citation Download Citation

Hyucksu Choi, Yongsoo Lee, Jonghee Eun, Joonwo Jung, and Kyunghwan Oh "Orbital angular momentum mode generation using anisotrophic liquid crystal filled capillary", Proc. SPIE 11926, Optical Manipulation and Structured Materials Conference 2021, 1192609 (27 October 2021); https://doi.org/10.1117/12.2616006

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