We show the formation of tunneling-induced ultraslow bright and dark solitons in an asymmetric double-quantum- well structure based on the tunneling induced transparency. In this semiconductor structure, the pump fiel...We show the formation of tunneling-induced ultraslow bright and dark solitons in an asymmetric double-quantum- well structure based on the tunneling induced transparency. In this semiconductor structure, the pump field is replaced by the electron-tunneling coupling, which can be modulated by a static electric field. With appropriate conditions, we demonstrate by modulating the intensity of the static electric field that the interplay between the group velocity dispersion and the self-Kerr nonlinearity results in the generation of dark and bright solitons with ultraslow group velocity.展开更多
The ion density distribution in the reaction chamber was diagnosed by a Langmuir probe. The rules of the ion density distribution were obtained under the pressures of 9 Pa, 13 Pa, 27 Pa and 53 Pa in the reaction chamb...The ion density distribution in the reaction chamber was diagnosed by a Langmuir probe. The rules of the ion density distribution were obtained under the pressures of 9 Pa, 13 Pa, 27 Pa and 53 Pa in the reaction chamber, different radio-frequency powers and different positions. The result indicates that the ion density decreases as the pressure increases, and increases as the power decreases. The ion density of axial position z =0 achieves 5.8×1010 on the center of coil under the power of 200 w and pressure of 9 Pa in the reaction chamber.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 11104176 and 11104174)the Natural Science Foundation of Shaanxi Province,China (Grant No. 2011JQ1008)+1 种基金the Fundamental Research Funds for the Central University,China (Grant Nos. GK201003003 and GK201002024)the Open Fund from the SKLPS of ECNU,China
文摘We show the formation of tunneling-induced ultraslow bright and dark solitons in an asymmetric double-quantum- well structure based on the tunneling induced transparency. In this semiconductor structure, the pump field is replaced by the electron-tunneling coupling, which can be modulated by a static electric field. With appropriate conditions, we demonstrate by modulating the intensity of the static electric field that the interplay between the group velocity dispersion and the self-Kerr nonlinearity results in the generation of dark and bright solitons with ultraslow group velocity.
基金The project supported by the Natural Science Foundation of Guangdong province (No. 000675) the Key project tackled of Guangdong province (ZKM01401G)
文摘The ion density distribution in the reaction chamber was diagnosed by a Langmuir probe. The rules of the ion density distribution were obtained under the pressures of 9 Pa, 13 Pa, 27 Pa and 53 Pa in the reaction chamber, different radio-frequency powers and different positions. The result indicates that the ion density decreases as the pressure increases, and increases as the power decreases. The ion density of axial position z =0 achieves 5.8×1010 on the center of coil under the power of 200 w and pressure of 9 Pa in the reaction chamber.
