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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

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Published on: February 27, 2019

Polychromatic Optical Vortex Generation from Patterned Cholesteric Liquid Crystals.

Junji Kobashi¹, Hiroyuki Yoshida^1,2, Masanori Ozaki¹

¹Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.

Physical Review Letters

|July 9, 2016

Summary

This summary is machine-generated.

Researchers generated optical vortices using cholesteric liquid crystals and a unique helix phase. This method offers high-efficiency, polychromatic optical vortex generation without complex fabrication.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Optical vortices are beams with a helical phase front.
Generating optical vortices typically requires complex setups or specialized materials.
Cholesteric liquid crystals (CLCs) exhibit unique optical properties due to their helical structure.

Purpose of the Study:

To demonstrate a novel method for generating optical vortices.
To utilize the properties of CLCs for efficient optical vortex creation.
To enable polychromatic generation of optical vortices.

Main Methods:

Utilizing cholesteric liquid crystals with a singular point in helix phase distribution.
Exploiting the phase variation of Bragg reflected light proportional to the helix spatial phase.
Investigating the phenomenon at both normal and oblique incidences.

Main Results:

Successful generation of optical vortices in CLCs.
Demonstrated high-efficiency generation.
Achieved polychromatic generation of optical vortices.
Eliminated the need for cumbersome fabrication and fine-tuning.

Conclusions:

The proposed method provides an efficient and versatile way to generate optical vortices.
CLCs offer a promising platform for advanced optical beam shaping.
This technique simplifies the generation of optical vortices, making them more accessible.