Abstract
We report a new nematic mixture for liquid-crystal-on-silicon spatial light modulator (SLM) and light detection and ranging (LiDAR) applications. The mixture exhibits a relatively high birefringence (Δn), moderate dielectric anisotropy (Δɛ), low viscosity, and reasonably good photostability. To achieve 2π phase change at 5 V, the response time (on + off) is 2.5 ms at 40 °C with λ = 633 nm, and 5.9 ms with λ = 905 nm. After exposure by a blue laser (λ = 465 nm) with a total dosage up to 20 MJ/cm2, this mixture shows no sign of photodegradation. Widespread applications of this material for high brightness SLMs, LiDAR, near-eye displays, and head-up displays are foreseeable.
Highlights
E.-L.; Ooishi, H.; Yang, Z.; Yoshidaya, Liquid crystals (LCs) have been widely used in display devices [1,2], such as smartphones, computers, TVs, emergent augmented reality (AR) and virtual reality (VR) [3], and vehicle displays [4], to name a few
We present a new LC mixture formulated by DIC, designated as A4907, for LCoS spatial light modulator (SLM) and light detection and ranging (LiDAR) applications
The experimental data are converted to reflection-type cells
Summary
E.-L.; Ooishi, H.; Yang, Z.; Yoshidaya, Liquid crystals (LCs) have been widely used in display devices [1,2], such as smartphones, computers, TVs, emergent augmented reality (AR) and virtual reality (VR) [3], and vehicle displays [4], to name a few. In addition to intensity modulators, LC can work as a phase-only spatial light modulator (SLM) Under such a circumstance, no polarizer is needed if the incident laser is already linearly polarized. On the reflection-type SLM, liquid-crystal-on-silicon (LCoS) [6,7,8] is a well-developed technology because of its high-resolution density, low operation voltage, and fast response time. A liquid crystal integrated metasurface was applied to steer a laser beam for LiDAR [15] For this kind of SLM, response time is a key factor. Such a fast response time results from the relatively high birefringence and low viscoelastic constant of A4907 This mixture exhibits a reasonably good photostability at λ = 465 nm for a dosage up to 20 MJ/cm
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
