Switching behaviour of polycrystalline diamond thin films is reported.Boron-doped diamond thin films were deposited by microwave plasma-assisted chemical vapor deposition on silicon substrate.Dependence of switching b...Switching behaviour of polycrystalline diamond thin films is reported.Boron-doped diamond thin films were deposited by microwave plasma-assisted chemical vapor deposition on silicon substrate.Dependence of switching behaviour on boron impurity has been investigated.The threshold voltage obviously decreases with increasing content of boron dopant.展开更多
In this paper,we consider the following difference equationxn+1=δxn-3t+1+xn-4t+1/A+xn-4t+1 n=0,1,….where t∈{1,2,…},and the initial values are positive.We investigate the global character of solutions of the above ...In this paper,we consider the following difference equationxn+1=δxn-3t+1+xn-4t+1/A+xn-4t+1 n=0,1,….where t∈{1,2,…},and the initial values are positive.We investigate the global character of solutions of the above difference equation,in particular we show that every solution of the difference equations in bounded.展开更多
A silicon-on-insulator 2× 2 Mach-Zehnder thermo-optical switch is developed based on strongly guided paired multimode interference couplers. The multimode-interference couplers were etched deeply for improving co...A silicon-on-insulator 2× 2 Mach-Zehnder thermo-optical switch is developed based on strongly guided paired multimode interference couplers. The multimode-interference couplers were etched deeply for improving coupler characteristics such as self-imaging quality, uniformity and fabrication toierance. The proposed switch achieves good performances, including a low insertion loss of -11.0dB, a fiber-waveguide coupling loss of-4.3dB and a fast response speed measured to be 3.5 and 8.8 μs for raise and fall switching time, respectively.展开更多
文摘Switching behaviour of polycrystalline diamond thin films is reported.Boron-doped diamond thin films were deposited by microwave plasma-assisted chemical vapor deposition on silicon substrate.Dependence of switching behaviour on boron impurity has been investigated.The threshold voltage obviously decreases with increasing content of boron dopant.
基金Youth Research Foundation of Xinyang Normal University(200951)
文摘In this paper,we consider the following difference equationxn+1=δxn-3t+1+xn-4t+1/A+xn-4t+1 n=0,1,….where t∈{1,2,…},and the initial values are positive.We investigate the global character of solutions of the above difference equation,in particular we show that every solution of the difference equations in bounded.
基金Supported in part by the National "973" Plan (No. G2000-03-66and No.2006CB921702)National Natural Science Foundationof China(NO. 10674185)the Science Foundation of the Cen-tral University for Nationalities (No. CUN07A)
文摘A silicon-on-insulator 2× 2 Mach-Zehnder thermo-optical switch is developed based on strongly guided paired multimode interference couplers. The multimode-interference couplers were etched deeply for improving coupler characteristics such as self-imaging quality, uniformity and fabrication toierance. The proposed switch achieves good performances, including a low insertion loss of -11.0dB, a fiber-waveguide coupling loss of-4.3dB and a fast response speed measured to be 3.5 and 8.8 μs for raise and fall switching time, respectively.
