Three-layer polarisation volume grating with enhanced diffraction efficiency and FOV in AR and VR applications DOI
Ali Zia, Huan Wu, Sadaf Saeed

et al.

Liquid Crystals, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 10

Published: Nov. 4, 2024

In the rapidly evolving fields of Augmented Reality (AR) and Virtual (VR), achieving high diffraction efficiency a wide field view (FOV) is critical for enhancing visual experience. This paper presents three-layer Polarisation Volume Grating (TL-PVG) structure designed to address limitations single-layer PVGs in AR/VR applications. By stacking multiple PVG layers with different tilt angles, TL-PVG achieves an expanded angular bandwidth improved efficiency, enabling brighter more immersive displays. The proposed incorporates polarisation multiplexing optimise optical by approximately 75%, thereby image brightness sharpness. experimental results demonstrate that significantly outperforms traditional PVGs, offering promising solution waveguide elements next-generation study provides comprehensive analysis fabrication process, properties, applications TL-PVGs, highlighting their potential revolutionise technology.

Language: Английский

Synergistic antireflection and SERS enhancement in hybrid silicon nanowires by LIL and MACE DOI Creative Commons
Sadaf Saeed, Ali Zia, Sana Tariq

et al.

Deleted Journal, Journal Year: 2025, Volume and Issue: 20(1)

Published: Feb. 21, 2025

Abstract This paper presents an innovative approach to fabricating dual-functional hybrid silicon nanowire (SiNW) arrays that demonstrate antireflection and Surface-Enhanced Raman Scattering (SERS) potentials. Three-beam laser interference lithography (TBLIL) is used create fringe patterns on a Si substrate, which serves as template for subsequent NWs creation. Subsequently, metal-assisted chemical etching (MACE) selectively etched the substrate stimulated formation of SiNWs with various aspect ratios. The morphological optical features were characterized by scanning electron microscopy (SEM), finite difference time domain (FDTD), spectroscopy. resulting structured surface morphology effectively reduced reflection losses at wavelengths. spectra rhodamine 6G (R6G) analytes concentrations 10 –4 –8 are examined, indicating signals significantly enhanced had long-term stability reliability. characteristic peaks R6G observed 620, 1361, 1660 cm −1 , potentially useful in sensitive sensors.

Language: Английский

Citations

0
Design and fabrication of curved waveguide display based on freeform polarization volume holograms DOI Creative Commons
Jiacheng Weng,

Chunyang Pei,

Haifeng Li

et al.

Optics Express, Journal Year: 2025, Volume and Issue: 33(7), P. 15362 - 15362

Published: March 10, 2025

As one of the most promising augmented reality solutions, waveguide display has attracted widespread attention in recent years. However, existing research and commercial products are limited to planar scheme. Here, we propose a curved scheme using freeform polarization volume holograms (F-PVHs) as couplers. The design this relies on cooperative optimization after coupler is unfolded. Due high degrees freedom F-PVHs, proposed can accurately correct aberrations with wide field view while improving brightness uniformity imaging. designed be conveniently obtained fabrication process flexible transferable F-PVHs. systems 1D 2D exit pupil expansion presented respectively. effectiveness superiority our method demonstrated through high-resolution imaging results large eye box simulation. Furthermore, sample prototype prepared prove feasibility Finally, discuss current shortcomings scalability scheme, hoping pave way for development high-performance displays.

Language: Английский

Citations

0
Tuning the Electrical Resistivity of Molecular Liquid Crystals for Electro-Optical Devices DOI Creative Commons

Michael Gammon,

Iyanna Trevino,

Michael Burnes

et al.

Published: April 2, 2025

Language: Английский

Citations

0
Three-layer polarisation volume grating with enhanced diffraction efficiency and FOV in AR and VR applications DOI
Ali Zia, Huan Wu, Sadaf Saeed

et al.

Liquid Crystals, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 10

Published: Nov. 4, 2024

In the rapidly evolving fields of Augmented Reality (AR) and Virtual (VR), achieving high diffraction efficiency a wide field view (FOV) is critical for enhancing visual experience. This paper presents three-layer Polarisation Volume Grating (TL-PVG) structure designed to address limitations single-layer PVGs in AR/VR applications. By stacking multiple PVG layers with different tilt angles, TL-PVG achieves an expanded angular bandwidth improved efficiency, enabling brighter more immersive displays. The proposed incorporates polarisation multiplexing optimise optical by approximately 75%, thereby image brightness sharpness. experimental results demonstrate that significantly outperforms traditional PVGs, offering promising solution waveguide elements next-generation study provides comprehensive analysis fabrication process, properties, applications TL-PVGs, highlighting their potential revolutionise technology.

Language: Английский

Citations

1