在介绍了面向服务的自动测试系统ATS(Automatic Test System)特点后,借鉴Kruchten的方法,设计了面向服务的ATS软件平台模型结构,分析了面向服务的仪器驱动器封装设计面临的问题,采用模型驱动架构的方法对仪器驱动器进行封装设计,并以示...在介绍了面向服务的自动测试系统ATS(Automatic Test System)特点后,借鉴Kruchten的方法,设计了面向服务的ATS软件平台模型结构,分析了面向服务的仪器驱动器封装设计面临的问题,采用模型驱动架构的方法对仪器驱动器进行封装设计,并以示波器的仪器驱动器设计与实现为例进行了验证。展开更多
The third-order optical nonlinearities of [（CH3）4N]Au（dmit）2 （dmit = 4,5-dithiolate-1,3-dithiole-2-thione） at 532 nm and 1064 nm are investigated using the Z-scan technique with pulses of picoseconds duration. T...The third-order optical nonlinearities of [（CH3）4N]Au（dmit）2 （dmit = 4,5-dithiolate-1,3-dithiole-2-thione） at 532 nm and 1064 nm are investigated using the Z-scan technique with pulses of picoseconds duration. The Z-scan spectra reveal a strong nonlinear absorption （reverse saturable absorption） and a negative nonlinear refraction at 532 nm. No nonlinear absorption is observed at 1064 nm. The molecular second-order hyperpolarizability γ for the [（CH3）4N]Au（dmit）2 molecule at 532nm is estimated to be as high as （2.1 ±0.1） × 10^-31 esu, which is nearly three times larger than that at 1064 nm. The mechanism responsible for the difference between the results is analysed. Nonlinear transmission measurements suggest that this material has potential applications in optical limiting.展开更多
Photoluminescence spectroscopy is used to study defects found in single ZnO nano/microwires at 90K. The defect, acting as binding site for bound exciton （BX） transition, is represented by BF, the fractional intensit...Photoluminescence spectroscopy is used to study defects found in single ZnO nano/microwires at 90K. The defect, acting as binding site for bound exciton （BX） transition, is represented by BF, the fractional intensity of the BX peak in the whole near-band edge ultraviolet （UV） luminescence. The concentration of defects as origins of the visible emissions is proportional to the intensity fraction DF, i.e., the intensity fraction of visible emissions in the sum total of all UV and visible luminescences. By comparing BF and DF, it is concluded that the two defects are not correlated to each other. The former kind of defect is considered to be related to the blueshift of the near-band edge peak as the radius of the nano/microwires decreases at room temperature.展开更多
A novel dmit^2- salt： （tetramethylammonium）bis（1,3-dithiole-2-thione-4,5-dithiolato） copper, abbreviated as MECu, is synthesized and its third-order optical nonlinearity is characterized by Z-scan technique at a ...A novel dmit^2- salt： （tetramethylammonium）bis（1,3-dithiole-2-thione-4,5-dithiolato） copper, abbreviated as MECu, is synthesized and its third-order optical nonlinearity is characterized by Z-scan technique at a wavelength of 1064nm with laser duration of 30ps. Z-scan curves reveal a negative Kerr coefficient at 1064nm and no nonlinear absorption is observed. The nonlinear refraction coefficient n2 and the second hyperpolarizability γ have been determined to be as large as 2.15 × 10^-11 esu and 3.23 × 10^-31 esu, respectively, suggesting MECu is a potential material for optical device applications.展开更多
文摘在介绍了面向服务的自动测试系统ATS(Automatic Test System)特点后,借鉴Kruchten的方法,设计了面向服务的ATS软件平台模型结构,分析了面向服务的仪器驱动器封装设计面临的问题,采用模型驱动架构的方法对仪器驱动器进行封装设计,并以示波器的仪器驱动器设计与实现为例进行了验证。
基金Project supported by the National Natural Science Foundation of China （Grant Nos 60377016 and 60476020） and the National High Technology Development Program of China （Grant No 2002AA313070）.
文摘The third-order optical nonlinearities of [（CH3）4N]Au（dmit）2 （dmit = 4,5-dithiolate-1,3-dithiole-2-thione） at 532 nm and 1064 nm are investigated using the Z-scan technique with pulses of picoseconds duration. The Z-scan spectra reveal a strong nonlinear absorption （reverse saturable absorption） and a negative nonlinear refraction at 532 nm. No nonlinear absorption is observed at 1064 nm. The molecular second-order hyperpolarizability γ for the [（CH3）4N]Au（dmit）2 molecule at 532nm is estimated to be as high as （2.1 ±0.1） × 10^-31 esu, which is nearly three times larger than that at 1064 nm. The mechanism responsible for the difference between the results is analysed. Nonlinear transmission measurements suggest that this material has potential applications in optical limiting.
文摘Photoluminescence spectroscopy is used to study defects found in single ZnO nano/microwires at 90K. The defect, acting as binding site for bound exciton （BX） transition, is represented by BF, the fractional intensity of the BX peak in the whole near-band edge ultraviolet （UV） luminescence. The concentration of defects as origins of the visible emissions is proportional to the intensity fraction DF, i.e., the intensity fraction of visible emissions in the sum total of all UV and visible luminescences. By comparing BF and DF, it is concluded that the two defects are not correlated to each other. The former kind of defect is considered to be related to the blueshift of the near-band edge peak as the radius of the nano/microwires decreases at room temperature.
基金Supported by the National Natural Science Foundation under Grant No 60377016 and 60476020, and the National High Technology Development Program of China under Grant No 2002AA313070.
文摘A novel dmit^2- salt： （tetramethylammonium）bis（1,3-dithiole-2-thione-4,5-dithiolato） copper, abbreviated as MECu, is synthesized and its third-order optical nonlinearity is characterized by Z-scan technique at a wavelength of 1064nm with laser duration of 30ps. Z-scan curves reveal a negative Kerr coefficient at 1064nm and no nonlinear absorption is observed. The nonlinear refraction coefficient n2 and the second hyperpolarizability γ have been determined to be as large as 2.15 × 10^-11 esu and 3.23 × 10^-31 esu, respectively, suggesting MECu is a potential material for optical device applications.
