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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
Polychromatic liquid crystal laser arrays towards display applications
Stephen M Morris1, Philip J W Hands, Sonja Findeisen-Tandel
1Centre of Molecular Materials for Photonics & Electronics, Department of Engineering (Electrical Division), University of Cambridge, Cambridge, UK.
Optics Express
|July 8, 2009
Summary
Researchers created a novel red-green-blue liquid crystal laser array for advanced displays. This single-sample, two-dimensional array offers a wide color gamut and low speckle without complex fabrication.
Area of Science:
- Photonics and Display Technologies
- Materials Science
- Optoelectronics
Background:
- Band-edge liquid crystal lasers are promising for applications like laser projection displays.
- Current technologies often require complex fabrication for multi-color laser generation.
Purpose of the Study:
- To demonstrate simultaneous red-green-blue (RGB) lasing from a single liquid crystal sample.
- To develop a two-dimensional laser array for advanced display applications.
Main Methods:
- Fabrication of a two-dimensional laser array using dye-doped chiral nematic liquid crystals.
- Introduction of a pitch gradient across the liquid crystal cell.
- Optical pumping of the sample utilizing a lenslet array.
Main Results:
- Observation of a polychromatic laser array emitting simultaneous red, green, and blue light.
- Demonstration of a single liquid crystal sample producing a two-dimensional RGB laser array.
- Achieved low speckle and wide color gamut in the generated laser display.
Conclusions:
- The developed liquid crystal laser array offers a simplified approach to RGB laser generation.
- This technology is suitable for creating advanced laser-based displays with superior optical properties.
- The method avoids complex fabrication procedures for individual laser pixels.
