A single crystalline Mg2Si film was formed by solid phase reaction （SPR） of a Si（111） substrate with an Mg overlayer capped with an oxide layer（s）,which was enhanced by post annealing from room temperature to 10...A single crystalline Mg2Si film was formed by solid phase reaction （SPR） of a Si（111） substrate with an Mg overlayer capped with an oxide layer（s）,which was enhanced by post annealing from room temperature to 100℃ in a molecular beam epitaxy （MBE） system.The thermal stability of the Mg2Si film was then systematically investigated by post annealing in an oxygen-radical ambient at 300℃,450℃ and 650℃,respectively.The Mg2Si film stayed stable until the annealing temperature reached 450℃ then it transformed into amorphous MgOx attributed to the decomposition of Mg2Si and the oxidization of dissociated Mg.展开更多
The transmission sinusoidal grating(TSG) shows a different diffraction pattern with conventional black-white transmission grating(BWTG), which can focus the diffraction energy on a higher order and has been widely use...The transmission sinusoidal grating(TSG) shows a different diffraction pattern with conventional black-white transmission grating(BWTG), which can focus the diffraction energy on a higher order and has been widely used in the spectrum instruments. According to the description of the scalar diffraction theory, the numerical simulation for diffraction properties of the TSG has been studied for years. However, the fabrication of the TSG is difficult and seldom reported. In this article, a TSG is designed and an approach of the X-ray LIGA process is used to fabricate the TSG and the device can obtain the brightest diffraction peaks at the ±1 order with the zero-order diffraction peak unobvious on the background for a certain wavelength of the incident light.展开更多
基金Project supported by the National Natural Science Foundation (Grant Nos 50532090,60606023 and 60621091)the Ministry of Science and Technology of China (Grant Nos 2002CB613502 and 2007CB936203)Australia Research Council
文摘A single crystalline Mg2Si film was formed by solid phase reaction （SPR） of a Si（111） substrate with an Mg overlayer capped with an oxide layer（s）,which was enhanced by post annealing from room temperature to 100℃ in a molecular beam epitaxy （MBE） system.The thermal stability of the Mg2Si film was then systematically investigated by post annealing in an oxygen-radical ambient at 300℃,450℃ and 650℃,respectively.The Mg2Si film stayed stable until the annealing temperature reached 450℃ then it transformed into amorphous MgOx attributed to the decomposition of Mg2Si and the oxidization of dissociated Mg.
基金supported by National Natural Science Foundation of China(No.11405200)
文摘The transmission sinusoidal grating(TSG) shows a different diffraction pattern with conventional black-white transmission grating(BWTG), which can focus the diffraction energy on a higher order and has been widely used in the spectrum instruments. According to the description of the scalar diffraction theory, the numerical simulation for diffraction properties of the TSG has been studied for years. However, the fabrication of the TSG is difficult and seldom reported. In this article, a TSG is designed and an approach of the X-ray LIGA process is used to fabricate the TSG and the device can obtain the brightest diffraction peaks at the ±1 order with the zero-order diffraction peak unobvious on the background for a certain wavelength of the incident light.
