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排序方式: 共有149条查询结果,搜索用时 15 毫秒
31.
Peng Dong Yinjie Xiang Ruizhao Li Chenglong Wang Cheng Cheng Jie Cheng 《Annalen der Physik》2023,535(11):2300309
Surface polaritons are surface electromagnetic waves propagating along the surface of a medium, which play an important role in enhancing the photonic spin Hall effect (SHE). Among them, the successful excitation of surface exciton polaritons (SEPs) often requires cryogenic temperature, which limits their practical applications. In this contribution, a promising mechanism is presented for enhancing the photonic SHE by taking advantage of room-temperature SEPs in a prism-glass-TDBC-air configuration. By depositing the TDBC layer on plasmon active metal, the hybrid polariton, namely, surface plasmon exciton polariton (SPEP) can be observed, which gives rise to the further enhancement of photonic SHE. Furthermore, a refractive index sensor based on SEP (or SPEP) enhanced photonic SHE is proposed with the superior sensing performance. The results pave the way for the realization of giant photonic SHE in this simple and promising method, and offer the opportunity for developing highly sensitive optical sensors. 相似文献
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一种基于瞳面相位差的波前传感器相位恢复 总被引:3,自引:1,他引:2
根据瞳面相位差波前传感器的特点,提出把模式分解和随机并行梯度下降算法结合起来实现波前相位的恢复.以32单元变形镜的初始面形和Roddier提出的相位生成方法随机产生的一帧相屏为研究对象,分析所提出的相位恢复算法的性能.结果表明,两种情况下的畸变波前都得到了很好的恢复.当像差仅含有低阶成分时,使用模式分解法就可获得令人满... 相似文献
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The classical Ullmann C? S cross coupling reaction of aryl iodides with aromatic/alkyl thiols under catalysis of 15 mol% Cu(OAc)2·H2O and 15 mol% 2,2′‐biimidazole works at 80°C in DMSO for 3 h to provide a variety of aryl sulfides in good to excellent yields. 相似文献
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Xinliang Cai Dr. Yincai Xu Yue Pan Linjie Li Yexuan Pu Dr. Xuming Zhuang Prof. Chenglong Li Prof. Yue Wang 《Angewandte Chemie (International ed. in English)》2023,62(7):e202216473
Developing solution-processable red organic light-emitting diodes (OLEDs) with high color purity and efficiency based on multiple resonance thermally activated delayed fluorescence (MR-TADF) is a formidable challenge. Herein, by introducing auxiliary electron donor and acceptor moieties into the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) distributed positions of multiple resonance skeleton simultaneously, an effective strategy to obtain red MR-TADF emitters was represented. The proof-of-the-concept molecule BN-R exhibits a narrowband pure-red emission at 624 nm, with a high luminous efficiency of 94 % and a narrow bandwidth of 46 nm. Notably, the fabricated solution-processable pure-red OLED based on BN-R exhibits a state-of-the-art external quantum efficiency over 20 % with the Commission Internationale de I’Éclairage coordinates of (0.663, 0.337) and a long operational lifetime (LT50) of 1088 hours at an initial luminance of 1000 cd m−2. 相似文献
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The utilization of thermal energy from different sources is an important development direction for conserving energy.With the development of technology,refined and rapid utilization of thermal energy is required.Traditional thermal conductive materials cannot meet the growing needs of human beings.Therefore,people pay attention to two-dimensional graphene film materials for their thermal conductivity.This review collects current modeling group of thermal transport on graphene,including non-equilibrium Green function(NEGF) theory,molecular dynamics(MD) simulations modeling and Boltzmann transport equation method.These models can well explain several phenomena of phonon transport in graphene.Furthe r,structural de fects were discussed and expounded the effect for graphene thermal conductivity,including doping,grain bounda ry and defects.Deeply understanding of defects on graphene,we can better grasp the thermal conductivity of graphene from the microscopic point of view. 相似文献
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为分析气冷微型堆可燃毒物布置策略,分别建立长寿期(15 MW-20 a)、短寿期(5 MW-1 a)、较长寿期(5 MW-3~10 a)不换料堆芯模型,利用通用蒙卡程序,研究气冷堆中常用可燃毒物核素种类、可燃毒物布置方案对堆芯反应性、寿期等特性的影响。研究结果表明:长寿期堆芯中,整体型Er2O3可以有效控制堆芯剩余反应性,但在寿期末会造成一定的反应性惩罚;整体型B4C可以较好地控制堆芯剩余反应性,并在寿期末几乎不会造成反应性惩罚,通过分区布置还可以优化功率分布;分离型B4C可以使燃耗特性曲线在寿期初和寿期中变化很平坦。短寿期堆芯中,分离型Gd2O3毒物棒可以很好地控制剩余反应性且不会缩短堆芯寿期;常见的B4C布置方式并不合适,但B4C弥散在堆芯石墨内可以起到较好的毒物效果。较长寿期堆芯中,分离型Gd2O3毒物棒不仅可以有效控制剩余反应性,还可以保证堆芯具备仅依靠温度负反馈实现自动停堆的固有安全性。研究结果将为后续气冷微堆型号研发提供指导。 相似文献