Polarization-independent liquid-crystal phase modulator with multi-microdomain orthogonally twisted photoalignment

Polarization-independent liquid-crystal(LC)phase modulators can significantly improve the efficiency and reduce the complexity of optical systems.However,achieving good polarization independence for LC phase modulators with a simple structure is difficult.A light-controlled azimuth angle(LCAA)process based on the optical rotatory effect of cholesteric liquid crystals(CLC)was developed for fabricating single-layer,multi-microdomain,orthogonally twisted(MMOT)structures.The developed LC phase modulator with a single-layer MMOT structure may have a low polarization dependence with a large phase depth.This device shows good potential for applications in optical communications,wearable devices,and displays.

氧化因素对ZrB_2-YAG复相陶瓷表面微区影响的研究

二硼化锆具有许多优异性能,因此它的应用非常广泛。本文研究氧化因素对ZrB2-YAG复相陶瓷的表面微区的影响,为改善超高温陶瓷奠定基础。结果表明:随着氧化温度升高,氧化层厚度增加。在1 300℃以下温度,氧化后陶瓷表面都有(m)ZrO2、YAG、B2O3和ZrB2,而1 300℃氧化后陶瓷表层中的ZrB2完全被氧化,不存在了。氧化层厚度随氧化时间的延长而增厚,但增厚的速率越来越小。