研究了新型光波导阵列电光快速扫描器的馈电特性和馈电方式.针对N I N(P I P)型结构和P I N型结构的光波导阵列电光扫描器,导出了相应的馈电电压公式,提出了一种能最大限度降低驱动电压的新方法,并据此研制了4波导P I N阵列扫描器的控...研究了新型光波导阵列电光快速扫描器的馈电特性和馈电方式.针对N I N(P I P)型结构和P I N型结构的光波导阵列电光扫描器,导出了相应的馈电电压公式,提出了一种能最大限度降低驱动电压的新方法,并据此研制了4波导P I N阵列扫描器的控制电源,成功地进行了电光扫描实验.展开更多
In this paper,we demonstrate that controlled dopant-concentration is an essential issue for charge carriers transporting in red Phosphorescent Organic Light-Emitting Device(PHOLED).Carriers transport via dopant molecu...In this paper,we demonstrate that controlled dopant-concentration is an essential issue for charge carriers transporting in red Phosphorescent Organic Light-Emitting Device(PHOLED).Carriers transport via dopant molecules in the emitting layer with a single host,however,via both dopant and host molecules when their energy levels are well aligned.Conditions for reduced driving-voltage and enhanced efficiency of red PHOLED are obtained by employing a mixed host structure.A pure red PHOLED with color coordinates of(0.67,0.33) has been realized by using only 4 wt% dopant,The device achieves 100 cd/cm2 at 2.9 V,with corresponding power efficiency of 9.3 lm/W and external quantum efficiency of 14.3%.展开更多
In this paper, a polymer electro-optic modulator is designed and simulated using the full vectorial finite element method. First order edge elements are used in finite element implementation, and the finite element te...In this paper, a polymer electro-optic modulator is designed and simulated using the full vectorial finite element method. First order edge elements are used in finite element implementation, and the finite element technique is used to obtain modulator response thoroughly. From the numerical analysis, frequency dispersions of modulator's important parameters, such as microwave effective index nm , microwave characteristic impedance ZC and microwave loss a, are extracted. Our design exhibits electrical bandwidth of 260 GHz and drive voltage of about 2.8 V.cm in this frequency.展开更多
0101867平面变压器的结构原理与应用[刊]/罗利文//电子技术应用.—2000,26(10).—65～66(D)大多数 DC/DX;变换器都需要隔离变压器,而平面变压器技术在隔离变压器的许多方面实现了重要的突破。介绍了平面变压器的结构、性能和使用方法。...0101867平面变压器的结构原理与应用[刊]/罗利文//电子技术应用.—2000,26(10).—65～66(D)大多数 DC/DX;变换器都需要隔离变压器,而平面变压器技术在隔离变压器的许多方面实现了重要的突破。介绍了平面变压器的结构、性能和使用方法。参3Y2000-62474-689 0101868信号频率为0.25GHz～40GHz 的低驱动电压射频微电机械系统开关=Low actuation voltage RF MEMSswitches with signal frequencies from 0.25GHz to 40GHz[会,英]/Shen,S.C.& Feng.M.//1999 IEEE Inter-national Electron Devices Meeting.—689～692(PC)介绍一种新的低压无线电频率微电机械系统(RFMEMS)开关,其开关电压为14～17V。当开关以40GHz 接通时,介入损耗不超过0.5dB,返回损耗为-15dB;当处于断开状态时,在0.25GHz～40GHz 频带上可达到27dB 以上隔离。描述了开关结构。展开更多
基金the National Hi-Tech Research and Development Program of China，the Ministry of Science and Technology of China，the National Natural Science Foundation of China，the Research Fund for the Doctoral Program of Higher Education，the Scientific and Technological Developing Scheme of Jilin Province
文摘In this paper,we demonstrate that controlled dopant-concentration is an essential issue for charge carriers transporting in red Phosphorescent Organic Light-Emitting Device(PHOLED).Carriers transport via dopant molecules in the emitting layer with a single host,however,via both dopant and host molecules when their energy levels are well aligned.Conditions for reduced driving-voltage and enhanced efficiency of red PHOLED are obtained by employing a mixed host structure.A pure red PHOLED with color coordinates of(0.67,0.33) has been realized by using only 4 wt% dopant,The device achieves 100 cd/cm2 at 2.9 V,with corresponding power efficiency of 9.3 lm/W and external quantum efficiency of 14.3%.
文摘In this paper, a polymer electro-optic modulator is designed and simulated using the full vectorial finite element method. First order edge elements are used in finite element implementation, and the finite element technique is used to obtain modulator response thoroughly. From the numerical analysis, frequency dispersions of modulator's important parameters, such as microwave effective index nm , microwave characteristic impedance ZC and microwave loss a, are extracted. Our design exhibits electrical bandwidth of 260 GHz and drive voltage of about 2.8 V.cm in this frequency.
文摘0101867平面变压器的结构原理与应用[刊]/罗利文//电子技术应用.—2000,26(10).—65～66(D)大多数 DC/DX;变换器都需要隔离变压器,而平面变压器技术在隔离变压器的许多方面实现了重要的突破。介绍了平面变压器的结构、性能和使用方法。参3Y2000-62474-689 0101868信号频率为0.25GHz～40GHz 的低驱动电压射频微电机械系统开关=Low actuation voltage RF MEMSswitches with signal frequencies from 0.25GHz to 40GHz[会,英]/Shen,S.C.& Feng.M.//1999 IEEE Inter-national Electron Devices Meeting.—689～692(PC)介绍一种新的低压无线电频率微电机械系统(RFMEMS)开关,其开关电压为14～17V。当开关以40GHz 接通时,介入损耗不超过0.5dB,返回损耗为-15dB;当处于断开状态时,在0.25GHz～40GHz 频带上可达到27dB 以上隔离。描述了开关结构。
