利用熔融法制备了 Ba O- Sr O- Ti O2 - Si O2 (BSTS)系统玻璃 ,并经过一定晶化处理获得了极性微晶取向生长的玻璃陶瓷 ,用 X-射线衍射 (XRD)对取向生长进行了表征。利用晶格能和偶极子电场对极性玻璃陶瓷的微晶取向生长机理进行了分析 ...利用熔融法制备了 Ba O- Sr O- Ti O2 - Si O2 (BSTS)系统玻璃 ,并经过一定晶化处理获得了极性微晶取向生长的玻璃陶瓷 ,用 X-射线衍射 (XRD)对取向生长进行了表征。利用晶格能和偶极子电场对极性玻璃陶瓷的微晶取向生长机理进行了分析 ,表明极性玻璃陶瓷中微晶取向生长是由表面或界面控制 ,且由晶格能大小和偶极子电场决定。展开更多
An all-optical diode behavior that uses a nonlinear one-dimensional photonic crystal (NPC) with a defect Kerr medium is numerically simulated by the use of a nonlinear finite-difference time-domain (NFDTD) method.The ...An all-optical diode behavior that uses a nonlinear one-dimensional photonic crystal (NPC) with a defect Kerr medium is numerically simulated by the use of a nonlinear finite-difference time-domain (NFDTD) method.The numerical results show that for an incident pulse with appropriate intensity and temporal width,the transmittance can be several times greater in one direction of NPC than in the opposite direction at the pulse carrier frequency. This behaves like an all-optical diode and has promising applications in some areas such as optical isolation and all-optical processing.The ways to obtain low threshold of pulse field strength to realize an all-optical diode are also analyzed in detail.展开更多
文摘利用熔融法制备了 Ba O- Sr O- Ti O2 - Si O2 (BSTS)系统玻璃 ,并经过一定晶化处理获得了极性微晶取向生长的玻璃陶瓷 ,用 X-射线衍射 (XRD)对取向生长进行了表征。利用晶格能和偶极子电场对极性玻璃陶瓷的微晶取向生长机理进行了分析 ,表明极性玻璃陶瓷中微晶取向生长是由表面或界面控制 ,且由晶格能大小和偶极子电场决定。
基金Supported by the National Natural Science Foundation of China(90201027 ,10374120)
文摘An all-optical diode behavior that uses a nonlinear one-dimensional photonic crystal (NPC) with a defect Kerr medium is numerically simulated by the use of a nonlinear finite-difference time-domain (NFDTD) method.The numerical results show that for an incident pulse with appropriate intensity and temporal width,the transmittance can be several times greater in one direction of NPC than in the opposite direction at the pulse carrier frequency. This behaves like an all-optical diode and has promising applications in some areas such as optical isolation and all-optical processing.The ways to obtain low threshold of pulse field strength to realize an all-optical diode are also analyzed in detail.
