共查询到20条相似文献,搜索用时 78 毫秒
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Physics of the Solid State - The main processes that occur during diffusion of gaseous carbon CO and silicon SiO monoxides through a layer of a single-crystal silicon carbide SiC of the cubic... 相似文献
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V. V. Antipov S. A. Kukushkin A. V. Osipov V. P. Rubets 《Physics of the Solid State》2018,60(3):504-509
An epitaxial cubic 350-nm-thick cadmium selenide has been grown on silicon for the first time by the method of evaporation and condensation in a quasi-closed volume. It is revealed that, in this method, the optimum substrate temperature is 590°C, the evaporator temperature is 660°C, and the growth time is 2 s. To avoid silicon etching by selenium with formation of amorphous SiSe2, a high-quality ~100-nm-thick buffer silicon carbide layer has been synthesized on the silicon surface by substituting atoms. The powder diffraction pattern and the Raman spectrum unambiguously correspond to cubic cadmium selenide crystal. The ellipsometric, Raman, and electron diffraction analyses demonstrate high structural perfection of the cadmium selenide layer and the absence of a polycrystalline phase. 相似文献
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XIAO Yun-feng HAN Zheng-fu GUO Guang-can 《量子光学学报》2006,12(B08):11-12
We propose a potential quantum-computer hardware-architecture model on a silicon chip in which the basic cell gate is the atom-photon controlled phase flip gate. This gate can be implemented through a single-photon pulses scattering by a toroidal microcavity trapping a neutral atom, and it does not require very strict strong-coupling regime and can work beyond the Lamb-Dicke limit with high fidelity and success probability under practical noise environments. Especially, good and bad losses of the toroidal cavity are discussed in detail. Finally, a possibly simple experiment based on current experimental technology is proposed to demonstrate our scheme. 相似文献
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Anfimov N. V. Vorobel V. Kovalev Yu. S. Kodyš P. 《Physics of Particles and Nuclei Letters》2019,16(6):820-825
Physics of Particles and Nuclei Letters - The Silicon Photomultiplier (SiPM) is a novel semiconducting photodetector which can detect single photons. It consists of many microcells (pixels)... 相似文献
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S. Feng T. Lei H. Chen H. Cai X. Luo A.W. Poon 《Laser \u0026amp; Photonics Reviews》2012,6(2):145-177
Silicon photonics leverages the optical, electrical and material properties of silicon and the mature complementary metal‐oxide semiconductor (CMOS) nanofabrication technique to develop on‐chip photonic integration, which has been making significant impacts in various frontiers including next‐generation optical communications networks, on‐chip optical interconnects for high‐speed energy‐efficient computing and biosensing. Among many optical structures fabricated on silicon chips, microresonators due to their high‐Q resonances and small footprints play important roles in various devices including lasers, filters, modulators, switches, routers, delays, detectors and sensors. This paper reviews from a microresonator perspective some of the latest progress in the field, summarizes design considerations in various applications and points out key challenges and potentials. 相似文献
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Weisser W. Frank K. Schroder G. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》2001,29(3):524-528
Through the last years, the pseudospark switch, a low-pressure gas discharge switch with hollow cathode geometry, became established as a promising element of pulsed power technology and a serious alternative to other high-power switches. The use of a novel electrode material silicon carbide yields performance improvements in two main areas. Quenching phenomena, a long-standing problem for several applications, are suppressed completely and the switch lifetime can be distinctly increased, approaching that of thyratrons for operation with high repetition rate. As a crow-bar switch, the lifetime is nearby unlimited due to cold electrode usage. Spatial and temporal resolved spectroscopy revealed new insight into the extraordinary discharge behavior of silicon carbide electrodes. The radial plasma expansion from the central bore hole to the outer electrode regions, forming vesicular shells of different ionization stages of Si and C, are described in detail. The remaining problem, a significant loss of deuterium gas during discharge, has been long-term tested and is assumed to be the outcome of absorption in the silicon carbide electrodes. An envisaged promising remedy is presented 相似文献
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Reveguk A. A. Petukhov A. E. Vishnyakova A. A. Koroleva A. V. Pudikov D. A. Zhizhin E. V. 《Physics of the Solid State》2019,61(8):1484-1489
Physics of the Solid State - The possibility of formation of ordered silicon structures, including silicene, on the graphite substrate surface has been studied. The effect of various conditions of... 相似文献
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Gordana Klaric Felic Feras Al-Dirini Faruque M. Hossain Thanh Cong Nguyen Efstratios Skafidas 《Applied Physics A: Materials Science & Processing》2014,115(2):491-493
Properties of surface plasmon polaritons can be exploited for the miniaturisation of photonic circuits below the optical wavelength scale. Smaller and more sensitive photodetectors can be made by using sub-wavelength semiconductor elements such as germanium or silicon nanowires in combination with nanometer-scale antennas. The proposed nanowire photodetector enables on-chip optical sensing applications with increased sensitivity and reduced size. 相似文献
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We propose a new method to reveal a direct transformation from solar energy to solar electricity. Instead of using electricity in the process, we use concentrated solar rays with a crucibleless process to upgrade metallurgical silicon into solar-grade silicon feedstock. 相似文献
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Gusev A. S. Kargin N. I. Ryndya S. M. Safaraliev G. K. Siglovaya N. V. Smirnova M. O. Solomatin I. O. Sultanov A. O. Timofeev A. A. 《Technical Physics》2021,66(7):869-877
Technical Physics - The results of this study quantitatively and qualitatively illustrate the processes of mismatch stress relaxation upon epitaxy of cubic silicon carbide on silicon. The... 相似文献
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We present experimental results for a silicon thermometer (p+-p-n+ device placed between the poles of a permanent magnet) with a frequency output. Measurements were made for temperatures in the range 77–335 K. When the temperature increases from 77 K to 335 K the device sensitivity decreases from 40 kHz/K to 3.1 kHz/K for a pulsed operating voltage of 65 V. The device sensitivity can be controlled through the operating voltage. We analyze the basic properties of thermometer element using the theory of the bulk helical instability of the semiconductor plasma. We compare its performance parameters with those of previously known devices with frequency outputs.V. D. Kuznetsov Siberian Physico-technical Institute at Tomsk University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 48–53, February, 1995. 相似文献
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在天文观测中人们发现 ,星际间的尘埃云发射红光 .有些天文学家认为 ,这些红光是宇宙尘埃中的硅发出的 .这一考虑是基于已观察到的光谱性质和宇宙中硅的丰度 .然而 ,早在 2 0世纪 60年代人们就认识到 ,大块硅基本上不能发光 .最近 ,来自意大利的科学家Pavesi等完成了一项关于硅纳米晶发光的研究 .他们的结果连同近年来其他同行研究小组的研究积累改变了人们对硅发光性能的认识 :当硅晶粒的尺寸减小到纳米量级时 ,其发光性能会发生显著的改变 .星系红光或许就是由其中的硅纳米晶发出的 .Pavesi等研究的基本目标是发展硅半导体激… 相似文献
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Krukovskii K. V. Kashin O. A. Romanov S. I. Bakina O. V. Lotkov A. I. Luchin A. V. 《Russian Physics Journal》2020,63(6):997-1002
Russian Physics Journal - The paper presents the research findings in the field of mechanical stability of single-crystal silicon macrospecimens containing hierarchically-structured porous silicon.... 相似文献
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Absorption coefficient is a physical parameter to describe electromagnetic energy absorption of materials, which is closely related to solar cells and photodetectors. We grow a series of positive-intrinsic-negative(PIN) structures on silicon wafer by a gas source molecule beam epitaxy system and the investigate the absorption coefficient through the photovoltaic processes in detail. It is found that the absorption coefficient is enhanced by one order and can be tuned greatly through the thickness of the intrinsic layer in the PIN structure, which is also demonstrated by the 730-nm-wavelength laser irradiation. These results cannot be explained by the traditional absorption theory.We speculate that there could be some uncovered mechanism in this system, which will inspire us to understand the absorption process further. 相似文献
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V. N. Bogomolov S. A. Gurevich M. V. Zamoryanskaya A. A. Sitnikova I. P. Smirnova V. I. Sokolov 《Physics of the Solid State》2001,43(2):373-376
A cathodoluminescence band in the green spectral region is observed in silicate matrices when the excitation density exceeds a certain threshold value. This band is due to the formation of silicon nanoclusters 4–5 nm in size and becomes manifest at SiO2/Si interfaces when impurities are introduced into the silicate matrix, as well as under electron-beam irradiation. 相似文献