Two-dimensional function photonic crystal

	Two-dimensional function photonic crystal
	Xiao, L.; T. Y. Lei; Y. Liang; M. Zhao; H. Liu; S. Q. Zhang; H. Li; J. Ma and X. Y. Wu
	2016
发表期刊	Acta Physica Sinica
卷号	65 期号:13
摘要	In the paper, using the one-seed method and multiseed method separately, the hexahedral type-Ib diamonds are synthesized in a cubic anvil under high pressure and high temperature. This cubic anvil is of Phi 550 mm hydraulic cylinder with the sample chambers of 14 mm or 26 mm in diameter under 5.6 GPa and 1200-1400 degrees C. The FeNiMnCo alloy is chosen as catalyst. The high-quality abrasive diamonds each with a diameter of 0.9 mm are used as seed crystals. High purity-graphite powder (99.99%, purity) is selected as the carbon source. The effects of cavity size on the growth of hexahedral type-Ib Gem-diamond single crystal are studied carefully. The Relationship between oil pressure and synthesis pressure is obtained in our studies. When the pressure is transmitted the same distance, in the catalyst melt, the pressure loss is less than in the pressure transmitting medium. By expanding synthesis cavity size, the pressure transmission efficiency of the oil pressure increases significantly, which can be attributed to the transmission distance shortening in the pressure transmitting medium and transmission distance lengthening in the catalyst melt. Using the Phi 14 mm synthesis cavity, by the one-seed method, the 5 mm grade diamond single crystals of cubo-octahedral shape are synthesized, but the 5 mm grade diamond single crystals of perfectly hexahedral shape could not be synthesized. Choosing the Phi 14 mm synthesis cavity, by the five-seed method, the 3 mm grade diamond single crystals in the center each present a perfectly hexahedral shape, but each outside of the crystals exhibits a cubo-octahedral shape. According to the application requirement for the type-Ib hexahedral diamond single crystal with a size of 3.0-3.5 mm on an industrial diamond single crystal tool, the diamond single crystals of perfect hexahedral shape are synthesized by the multiseed method. Using the Phi 26 mm synthesis cavity, many 3 mm grade diamond single crystals of perfectly hexahedral shape are synthesized in one synthesis cavity. In our studies, up to 14 diamond single crystals of perfect hexahedral shape are synthesized in one synthesis cavity by the multiseed method. We find that the uniformity of temperature field of the Phi 26 mm synthesis cavity is better than that of the Phi 14 mm synthesis cavity, so the Phi 26 mm synthesis cavity is suitable for growing 3 mm grade diamond single crystals of perfect hexahedral shape by the multiseed method. In 35 h growth time, the overall growth rate of the Phi 26 mm synthesis cavity (25.2 mg/h) synthesizing 14 diamonds in one time (9.4 mg/h) is 2.68 times that of the Phi 14 mm synthesis cavity by five-seed method. Moreover, the Raman spectra of the synthesized high-quality hexahedral type-Ib diamond single crystals and natural diamond single crystal indicate that the structure and quality of the synthesized high-quality diamond single crystal is better than that of a natural diamond.
文章类型	期刊
收录类别	SCI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/57294
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Xiao, L.,T. Y. Lei,Y. Liang,et al. Two-dimensional function photonic crystal[J]. Acta Physica Sinica,2016,65(13).
APA	Xiao, L..,T. Y. Lei.,Y. Liang.,M. Zhao.,H. Liu.,...&J. Ma and X. Y. Wu.(2016).Two-dimensional function photonic crystal.Acta Physica Sinica,65(13).
MLA	Xiao, L.,et al."Two-dimensional function photonic crystal".Acta Physica Sinica 65.13(2016).

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