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矿物学报 1989年第2期9卷 97-103页

作者：富毓德 ivan petrov S.S.Hafner 中国科学院地球化学研究所联邦德国马尔堡大学矿物学与结晶学研究所

在加热条件下,利用EPR方法研究了碱性长石中不同四面体位置间的Fe^(3+)、Al^(3+)交换。低温钠长石和透长石晶体分别在水热,1 kbar,500—900℃和干加热,1050℃条件下加热。在低温钠长石中,加热后Fe^(3+)线被加宽,当温度为800℃时,除T_1(o... 详细信息

在加热条件下,利用EPR方法研究了碱性长石中不同四面体位置间的Fe^(3+)、Al^(3+)交换。低温钠长石和透长石晶体分别在水热,1 kbar,500—900℃和干加热,1050℃条件下加热。在低温钠长石中,加热后Fe^(3+)线被加宽,当温度为800℃时,除T_1(o)位置外,没有出现其余四面体位置Fe^(3+)产生的谱线。透长石在1050℃加热1300h后,T_1和T_2线的相对强度发生了变化。实验表明,在碱性长石中不同四面体间Fe^(3+)、Ak^(3+)和Fe^(3+)、Si^(4+)交换与Al^(3+)、Si^(4+)交换比较,前者速度要缓慢得多。

关键词：长石碱性 Fe^3+ 动力学 EPR法

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热处理低温钠长石的EPR和X射线衍射研究

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矿物学报 1989年第4期9卷 296-303页

作者：富毓德 ivan petrov S.S.Hafner 中国科学院地球化学研究所联邦德国马尔堡大学矿物与结晶学研究所

利用电子顺磁共振(EPR)和X射线衍射方法研究了天然和热处理钠长石单晶。热处理在500—850℃水热条件下完成。在外加磁场B平行于晶体c~*轴的方向上,测量了加热前后Fe^(3+)的EPR谱和线宽△B随温度和加热时间的变化。结果显示,线宽随Al、S... 详细信息

利用电子顺磁共振(EPR)和X射线衍射方法研究了天然和热处理钠长石单晶。热处理在500—850℃水热条件下完成。在外加磁场B平行于晶体c~*轴的方向上,测量了加热前后Fe^(3+)的EPR谱和线宽△B随温度和加热时间的变化。结果显示,线宽随Al、Si无序的增大而增加。由此得出结论,在低温钠长石中,Fe^(3+)位于Al^(3+)占据的T_1(o)位置,在被研究的温度范围内,Fe^(3+)未参与四面体位置T间Al、Si交换。谱线的加宽主要是由在Fe^(3+)邻近位置上Al、Si无序的增大引起的,同时与观测到的晶胞参数变化有关。在Al、Si无序更强的晶体中,Fe^(3+)谱变得极宽。

关键词：钠长石矿物热处理 EPR X射线衍射

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Dynamic failure of dry and fully saturated limestone samples based on incubation time concept

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第1期9卷 125-134页

作者： Yuri V. petrov ivan V. Smirnov Grigory A. Volkov Andrei K. Abramian Anatoliy M. Bragov Stanislav N. Verichev Saint Petersburg University Universitetskaya nab. 7-9 Saint Petersburg 199034 Russia Institute of Problems of Mechanical Engineering Russian Academy of Sciences Bolshoj pr. 61 V.O. Saint Petersburg 199178 Russia Lobachevsky State University of Nizhni Novgorod Prospekt Gagarina 23 Nizhny Novgorod 603950 Russia Allseas Engineering B.V. Poortweg 12 Delft 2612 PA The Netherlands

This paper outlines the results of experimental study of the dynamic rock failure based on the comparison of dry and saturated limestone samples obtained during the dynamic compression and split tests. The tests were performed using the Kolsky method and its modifications for dynamic splitting. The mechanical data(e.g. strength, time and energy characteristics) of this material at high strain rates are obtained. It is shown that these characteristics are sensitive to the strain rate. A unified interpretation of these rate effects, based on the structuraletemporal approach, is hereby presented. It is demonstrated that the temporal dependence of the dynamic compressive and split tensile strengths of dry and saturated limestone samples can be predicted by the incubation time criterion. Previously discovered possibilities to optimize(minimize) the energy input for the failure process is discussed in connection with industrial rock failure processes. It is shown that the optimal energy input value associated with critical load, which is required to initialize failure in the rock media, strongly depends on the incubation time and the impact duration. The optimal load shapes, which minimize the momentum for a single failure impact, are demonstrated. Through this investigation, a possible approach to reduce the specific energy required for rock cutting by means of high-frequency vibrations is also discussed.

关键词： Dynamic strength Incubation time criterion Split Hopkinson pressure bar(SHPB) test Tensile strength Compressive strength Water-saturated limestone Vibration-assisted rock cutting

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Plasmon-assisted optical trapping and anti-trapping

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Light(Science & Applications) 2016年第1期5卷 52-57页

作者： Aliaksandra Ivinskaya Mihail I petrov Andrey A Bogdanov ivan Shishkin Pavel Ginzburg Alexander S Shalin Department of Nanophotonics and Metamaterials ITMO UniversityBirzhevaja Line14199034 St PetersburgRussia School of Electrical Engineering Tel Aviv UniversityRamat AvivTel Aviv 69978Israel Kotel’nikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences(Ulyanovsk branch) Goncharova Street 48/2432071 UlyanovskRussia Ulyanovsk State University Lev Tolstoy Street 42432017 UlyanovskRussia

The ability to manipulate small objects with focused laser beams has opened a venue for investigating dynamical phenomena relevant to both fundamental and applied *** and plasmonic structures enable superior performance in optical trapping via highly confined *** this case,the interplay between the excitation field,re-scattered fields and the eigenmodes of a structure can lead to remarkable effects;one such effect,as reported here,is particle trapping by laser light in a vicinity of metal *** plasmon excitation at the metal substrate plays a key role in tailoring the optical forces acting on a nearby *** on whether the illuminating Gaussian beam is focused above or below the metal-dielectric interface,an order-of-magnitude enhancement or reduction of the trap stiffness is achieved compared with that of standard glass ***,a novel plasmon-assisted anti-trapping effect(particle repulsion from the beam axis)is predicted and studied.A highly accurate particle sorting scheme based on the new anti-trapping effect is *** ability to distinguish and configure various electromagnetic channels through the developed analytical theory provides guidelines for designing auxiliary nanostructures and achieving ultimate control over mechanical motion at the microand nano-scales.

关键词： Gaussian beam Green’s function optical forces optical tweezers surface plasmon

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All-optical generation of static electric field in a single metal-semiconductor nanoantenna

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Light(Science & Applications) 2023年第11期12卷 2350-2362页

作者： Yali Sun Artem Larin Alexey Mozharov Eduard Ageev Olesia Pashina Filipp Komissarenko ivan Mukhin Mihail petrov Sergey Makarov Pavel Belov Dmitry Zuev School of Physics and Engineering ITMO UniversityLomonosova 9Saint Petersburg 191002Russia Center for Nanotechnologies Alferov UniversityKhlopina 8/3Saint Petersburg 194021Russia Higher School of Engineering Physics Peter the Great Saint Petersburg Polytechnic UniversityPolitekhnicheskaya 29Saint Petersburg 195251Russia

Electric field is a powerful instrument in nanoscale engineering,providing wide functionalities for control in various optical and solid-state *** development of a single optically resonant nanostructure operating with a charge-induced electrical field is challenging,but it could be extremely useful for novel nanophotonic ***,we show a resonant metal-semiconductor nanostructure with a static electric field created at the interface between its components by charge carriers generated via femtosecond laser *** study this field experimentally,probing it by second-harmonic generation signal,which,in our system,is time-dependent and has a non-quadratic signal/excitation power *** developed numerical models reveal the influence of the optically induced static electric field on the second harmonic generation *** also show how metal work function and silicon surface defect density for different charge carrier concentrations affect the formation of this *** estimate the value of optically-generated static electric field in this nanoantenna to achieve≈10^(8)V/*** findings pave the way for the creation of nanoantenna-based optical memory,programmable logic and neuromorphic devices.

关键词： antenna optical field

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