1.Introduction HPR1000 is an advanced mega-kilowatt-class third-generation pressurized water reactor(PWR)nuclear power technology developed by China,based on more than 30 years of experience in the scientific research...1.Introduction HPR1000 is an advanced mega-kilowatt-class third-generation pressurized water reactor(PWR)nuclear power technology developed by China,based on more than 30 years of experience in the scientific research,design,equipment manufacturing,construction,and operation of nuclear power.展开更多
Crystal morphologies and resistivity of polysilicon trap-rich layers of two-generation trap-rich silicon-on-insulator（TR-SOI） substrates are studied. It is found that the resistivity of the trap-rich layer of genera...Crystal morphologies and resistivity of polysilicon trap-rich layers of two-generation trap-rich silicon-on-insulator（TR-SOI） substrates are studied. It is found that the resistivity of the trap-rich layer of generation 2（TR-G2）is higher than that of generation 1（TR-G1）, although the crystal morphologies of the trap rich layers are the same. In addition, the rf performance of two-generation TR-SOI substrates is investigated by coplanar waveguide lines and inductors. The results show that both the rf loss and the second harmonic distortion of TR-G2 are smaller than those of TR-G1. These results can be attributed to the higher resistivity values of both the trap-rich layer and the high-resistivity silicon（HR-Si） substrate of TR-G2. Moreover, the rf performance of the TR-SOI substrate with thicker buried oxide is slightly better. The second harmonics of various TR-SOI substrates are simulated and evaluated with the harmonic quality factor model as well. It can be predicted that the TR-SOI substrate will see further improvement in rf performance if the resistivities of both the trap-rich layer and HR-Si substrate increase.展开更多
Polaritons in two-dimensional(2D)materials continues to garner significant attention due to their favorable ability of field-confinement and intriguing potential for low-loss and ultrafast optical and photonic devices...Polaritons in two-dimensional(2D)materials continues to garner significant attention due to their favorable ability of field-confinement and intriguing potential for low-loss and ultrafast optical and photonic devices.The recent experimental observation of in-plane anisotropic dispersion in natural van der Waals materials has revealed much richer physics as compared to isotropic plasmonic materials,which provides new insight to manipulate the polaritons and manufacture flat optical devices with unprecedented controls.Herein,we give an overview of the recent progress in in-plane anisotropic polaritons launched and visualized in the near-field range in 2D layered van der Waals materials.Furthermore,future prospects in this promising but emerging field are featured on the basis of its peculiar applications.This review article will stimulate the scientific community to explore other hyperbolic materials and structures in order to develop optical technologies with novel functionalities and further improve the understanding of the exotic photonic phenomena.展开更多
文摘1.Introduction HPR1000 is an advanced mega-kilowatt-class third-generation pressurized water reactor(PWR)nuclear power technology developed by China,based on more than 30 years of experience in the scientific research,design,equipment manufacturing,construction,and operation of nuclear power.
基金Supported by the National Natural Science Foundation of China under Grant Nos 61376021 and 61674159the Program of Shanghai Academic/Technology Research Leader under Grant No 17XD1424500
文摘Crystal morphologies and resistivity of polysilicon trap-rich layers of two-generation trap-rich silicon-on-insulator（TR-SOI） substrates are studied. It is found that the resistivity of the trap-rich layer of generation 2（TR-G2）is higher than that of generation 1（TR-G1）, although the crystal morphologies of the trap rich layers are the same. In addition, the rf performance of two-generation TR-SOI substrates is investigated by coplanar waveguide lines and inductors. The results show that both the rf loss and the second harmonic distortion of TR-G2 are smaller than those of TR-G1. These results can be attributed to the higher resistivity values of both the trap-rich layer and the high-resistivity silicon（HR-Si） substrate of TR-G2. Moreover, the rf performance of the TR-SOI substrate with thicker buried oxide is slightly better. The second harmonics of various TR-SOI substrates are simulated and evaluated with the harmonic quality factor model as well. It can be predicted that the TR-SOI substrate will see further improvement in rf performance if the resistivities of both the trap-rich layer and HR-Si substrate increase.
基金Australian Research Council,Grant/Award Numbers:IH150100006,CE170100039China Postdoctoral Science Foundation,Grant/Award Number:2017M622758,LHTD20170006+1 种基金support from the China Postdoctoral Science Foundation Grant(No.2017 M622758)Q.Bao acknowledges the support from the Australian Research Council(ARC,IH150100006,FT150100450,and CE170100039).
文摘Polaritons in two-dimensional(2D)materials continues to garner significant attention due to their favorable ability of field-confinement and intriguing potential for low-loss and ultrafast optical and photonic devices.The recent experimental observation of in-plane anisotropic dispersion in natural van der Waals materials has revealed much richer physics as compared to isotropic plasmonic materials,which provides new insight to manipulate the polaritons and manufacture flat optical devices with unprecedented controls.Herein,we give an overview of the recent progress in in-plane anisotropic polaritons launched and visualized in the near-field range in 2D layered van der Waals materials.Furthermore,future prospects in this promising but emerging field are featured on the basis of its peculiar applications.This review article will stimulate the scientific community to explore other hyperbolic materials and structures in order to develop optical technologies with novel functionalities and further improve the understanding of the exotic photonic phenomena.
