Chongfan Technology
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11
2026
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11
Mechanically Tunable Geometric-Phase Optical Elements Based on Cholesteric Liquid Crystal Elastomers
Author:
The teams of Dan Luo at Southern University of Science and Technology, Yajing Shen at the Hong Kong University of Science and Technology, and Yan-Qing Lu at Nanjing University have proposed mechanically tunable geometric-phase optical elements based on cholesteric liquid crystal elastomers (CLCEs). The authors demonstrate two prototypical CLCE geometric-phase optical elements—CLCE gratings and CLCE lenses—that exhibit dynamic tuning capabilities under reversible mechanical actuation, including adjustments to diffraction angles/focal lengths, central wavelengths, and diffraction efficiencies. Furthermore, by integrating a CLCE grating with a dielectric elastomer actuator, they successfully realized an electrically tunable CLCE grating that achieves rapid tuning and a compact design for beam manipulation. The CLCE-based mechanically tunable geometric-phase optical elements presented here offer a novel strategy for developing next-generation optical modulation devices, enabling simultaneous wavefront control and dynamic wavelength-band tuning, with applications in circularly polarized beam manipulation and display systems.
The research findings were published in Laser & Photonics Reviews on August 19, 2026, under the title “Mechanically Tunable Geometric Phase Optical Element Based on Cholesteric Liquid Crystal Elastomer.”
Figure 1: Schematic diagram of a mechanically tunable geometric phase optical device
Figure 2: Material and optical properties of CLC films
Figure 3: Fabrication and Performance of CLCE Gratings
Figure 4: Fabrication and Performance of CLCE Lenses
Figure 5: Electrically Tunable DEA-CLCE Grating
Source: optics World of Optics
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