Search

While LC display technologies have deep roots in augmented, virtual, and mixed realities, LC optics is emerging as a pivotal area within AR/VR/MR optics and the display community. [ABSTRACT FROM AUTHOR]

Polarization Volume Hologram (PVH) waveguide is an innovative liquid crystal‐based diffractive waveguide designed for augmented reality (AR) smart glasses, showcasing exceptional optical performance and simplified fabrication process. This presentation offers a comprehensive overview, including its working principles, advantages, performance optimization, process development, challenges and opportunities. The objective is to provide insights into PVH waveguide technology, from its inception to practical implementation. [ABSTRACT FROM AUTHOR]

Eye‐tracking is vital in AR/VR/MR systems for display correction, rendering, accommodation, and more. However, existing eye‐tracking solutions fall short in accuracy, efficiency, form factor, and population coverage. Using Liquid crystal polarization hologram (LCPH) for eye‐tracking purposes offers a compact form‐factor with excellent performance. [ABSTRACT FROM AUTHOR]

The development of high‐performance X‐ray detectors requires scintillators with fast decay time, high light yield, stability, and X‐ray absorption capacity, which are difficult to achieve in a single material. Here, we present the first example of a lanthanide chalcogenide of LaCsSiS4 : 1 % Ce3+ that simultaneously integrates multiple desirable properties for an ideal scintillator. LaCsSiS4 : 1 % Ce3+ demonstrates a remarkably low detection limit of 43.13 nGyair s−1 and a high photoluminescence quantum yield of 98.24 %, resulting in a high light yield of 50480±1441 photons/MeV. Notably, LaCsSiS4 : 1 % Ce3+ exhibits a fast decay time of only 29.35±0.16 ns, making it one of the fastest scintillators among all lanthanide‐based inorganic scintillators. Furthermore, this material shows robust radiation and moisture resistance, endowing it with suitability for chemical processing under solution conditions. To demonstrate the X‐ray imaging capacity of LaCsSiS4 : 1 % Ce3+, we fabricated a flexible X‐ray detector that achieved a high spatial resolution of 8.2 lp mm−1. This work highlights the potential of lanthanide chalcogenide as a promising candidate for high‐performance scintillators. [ABSTRACT FROM AUTHOR]

Liquid crystal optics are highly favorable for AR/VR/MR near‐eye displays because of the capability of modulating polarization and phase in an ultra‐compact profile. In this presentation, we discuss state‐of‐the‐art LC polarization hologram solutions for AR/VR/MR display technical needs, followed by remaining challenges and opportunities in the way towards high‐image‐quality and all‐day‐wearable near‐eye displays. [ABSTRACT FROM AUTHOR]

Monoclinic α‐Ag2S is an intriguing member of transition metal sulfides with great potential for all‐inorganic flexible optoelectronics and thermoelectrics. Fabrication of large‐area, high‐quality α‐Ag2S thin films and understanding their charge transport properties are critical for device operations yet have remained largely unexplored. Here, a novel two‐step, the solution‐processed approach is reported to produce wafer‐sized, highly crystalline α‐Ag2S thin films. Ultrafast terahertz (THz) conductivity measurements reveal that photogenerated charge carriers undergo efficient band transport, with room‐temperature mobility of ≈150 cm2 V‐1 s‐1 and a diffusion length exceeding 500 nm. Furthermore, introducing poly(vinyl alcohol) (PVA) as the rigid component into the aqueous silver thiolate precursor enables the synthesis of free‐standing α‐Ag2S thin films with a mobility of ≈35 cm2 V‐1 s‐1, demonstrating their potential for flexible optoelectronics. This study provides a facile synthesis route for high‐quality, large‐area α‐Ag2S thin films with good charge transport properties, relevant for their integration into optoelectronics and wearable electronics. [ABSTRACT FROM AUTHOR]

In this paper, we discuss different photo‐patterning paths for fabricating liquid crystal photonics devices, like geometric phase elements and polarization volume holograms for augmented reality and virtual reality (AR/VR) optical systems. We review the viability of typical photo‐patterning methods for small‐quantity research purposes, with a focus on direct write and interference recording. We present detailed comparisons between direct duplication and projection duplication, with recommendations for cost‐ and time‐efficient manufacturing paths. [ABSTRACT FROM AUTHOR]

Liquid crystal has been widely used in display applications, including Augmented Reality (AR) and Virtual Reality (VR) headset. In this paper, we discuss how liquid crystal technology can enable a virtual reality (VR) headset with glass‐type form factor, better image quality, and wearing comfort. [ABSTRACT FROM AUTHOR]

Flexible X-Ray Detector, Lanthanide Chalcogenide Scintillator, Luminescence, X-Ray Imaging Keywords: Flexible X-Ray Detector; Lanthanide Chalcogenide Scintillator; Luminescence; X-Ray Imaging EN Flexible X-Ray Detector Lanthanide Chalcogenide Scintillator Luminescence X-Ray Imaging 1 1 1 08/10/23 20230814 NES 230814 B Scintillators b . Frontispiece: Emergence of a Lanthanide Chalcogenide as an Ideal Scintillator for a Flexible X-ray Detector. [Extracted from the article]

A simple process for a reactive mesogen (RM) alignment layer is demonstrated with potential wide spread application in liquid crystal devices. A low concentration (0.3% wt) of RM dissolved in a liquid crystal is aligned by an azodye layer. After polymerization of the RM, the azodye is “bleached” to remove its visible absorption. The result is a versatile, low cost, stable alignment layer that is practical for AMLCDs. [ABSTRACT FROM AUTHOR]

We report liquid crystal functionalized smart fabrics fabricated by gas jet spinning or electrospinning. These fabrics retain all the stimuli-responsive properties of liquid crystals. Because they are flexible, self-supporting and have large surface-area-to-volume ratios, these fabrics are ideally suited for an array of sensing applications. [ABSTRACT FROM AUTHOR]