首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   5篇
  免费   3篇
  国内免费   1篇
化学   1篇
物理学   8篇
  2023年   1篇
  2020年   1篇
  2018年   1篇
  2012年   1篇
  2010年   2篇
  2007年   1篇
  2006年   2篇
排序方式: 共有9条查询结果,搜索用时 31 毫秒
1
1.
2.
We experimentally demonstrate an underwater optical wireless power transfer(OWPT) using a laser diode(LD)as a power transmitter. We investigate the characteristics of a solar cell and a photodiode(PD) as a power receiver. We optimize the LD, the PD, and the solar cell to achieve the maximum transfer efficiency. The maximum transfer efficiency of the back-to-back OWPT is measured as 4.3% with the PD receiver. Subsequently, we demonstrate the OWPT in tap and sea water. Our result shows an attenuation of 3 dB/m in sea water.  相似文献   
3.
随着微电子工业的快速发展,为了提高大规模集成电路中芯片间的传输速度以满足高集成化的要求,需要层间绝缘材料具有较低的介电常数。聚酰亚胺已被广泛用于大规模集成电路的层间绝缘材料,降低其介电常数的研究在近年来受到了广泛关注。当采用化学方法降低介电常数时,调控聚酰亚胺的分子结构是基础;在聚酰亚胺中构建多孔结构则是进一步降低介电常数的有效手段。本文从调控分子结构和构建多孔结构的角度出发,综述了化学法制备低介电常数聚酰亚胺的研究进展,并对低介电常数聚酰亚胺的研究前景进行了展望。  相似文献   
4.
赵松峰  周效信  金成 《物理学报》2006,55(8):4078-4085
利用数值方法求解含时薛定谔方程,研究了一维、二维模型氢原子和真实的三维氢原子在强激光场中产生的高次谐波和电离特性.结果表明,在多光子电离区域和过垒电离区域,模型氢原子与真实的氢原子产生的高次谐波和电离概率差别很小;在隧道电离区域,它们产生的高次谐波的平台特征和截止位置相似,电离概率随时间变化的趋势相近,但其数值有明显的差异.对产生这种差异的原因进行了分析. 关键词: 强激光场 高次谐波 电离概率  相似文献   
5.
用碱金属原子的模型势结合B-样条函数展开方法研究了静电场中铷原子里德堡态的能级结构特点,计算了铷原子主量子数n由16到25之间的(n 3)s和(n,k)态间的Stark能级反交叉位置和宽度,得到了与实验相一致的结果,并给出了计算铷原子在静电场中高里德堡态能级反交叉位置的经验公式.  相似文献   
6.
Using the single-atom induced dipole moment under strong field approximation as a source, we suggest a model to simulate the macroscopic high-order harmonic generation (HHG) from the mixed gases (He and Ne) interacting with intense infrared laser by solving the three-dimensional Maxwell's equation of the harmonic field. Regular destructive interference (DI) and constructive interference (CI) are observed in the macroscopic HHG spectra when the gas jet is put at a good phase-matching position. A semiclassical model of short and long electron trajectories is applied to interpret the DI and CI of HHG qualitatively.  相似文献   
7.
In terms of single-atom induced dipole moment by Lewenstein model, we present the macroscopic high-order harmonic generation from mixed He and Ne gases with different mixture ratios by solving three-dimensional Maxwell's equation of harmonic field. And then we show the validity of mixture formulation by Wagner et al. [Phys. Rev. A 76 (2007) 061403(R)] in macroscopic response level. Finally, using/east squares fitting we retrieve the electron return time of short trajectory by formulation in Kanai et al. [Phys. Rev. Lett. 98 (2007) 153904] when the gas jet is put after the laser focus.  相似文献   
8.
用伪谱方法研究强激光场中一维原子的稳定性   总被引:1,自引:1,他引:0  
将伪谱方法推广应用到Kramers-Henneberger (KH) 坐标系中求解了一维原子在强激光场中的薛定谔方程,研究了强激光场中一维原子的稳定性.结果表明,在中等强度的激光场中,原子没有发生电离抑制,而在高频超强激光场中,原子的电离受到抑制.  相似文献   
9.
Yanbo Chen 《中国物理 B》2023,32(1):14203-014203
Synthesis of multi-color laser pulses has been developed as a promising way to improve low conversion efficiency of high-order harmonic generation (HHG). Here we systematically study the effect of laser focus in a two-color waveform on generation of macroscopic HHG in soft x-rays. We find that the dependence of HHG yields on laser focus at low or high gas pressure is sensitive to the characteristics of single-atom harmonic response, in which "short"-or "long"-trajectory emissions can be selectively controlled by changing the waveform of two-color synthesized laser pulse. We uncover the phase-matching mechanism of HHG in the gas medium by examining the propagation of the two-color waveform and the evolution of time-frequency emissions of high-harmonic field. We further reveal that the nonlinear effects, such as geometric phase, atomic dispersion, and plasma defocusing, are responsible for modification of two-color waveform upon propagation. This work can be used to find better macroscopic conditions for generating soft x-ray HHG by employing two-color optimized waveforms.  相似文献   
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号