2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW)最新文献_第9页

Separation of the Instantaneous and Dynamic Polarizations in Studies of Dispersive Dielectrics Kharkov, Ukraine, June 25-30, 2007 色散介质研究中瞬时极化和动态极化的分离哈尔科夫，乌克兰，2007年6月25-30日

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294572

O. Tretyakov, F. Erden

引用次数: 4

Microwave Chaotic Open Cavities. Applications of Dynamical Trapping 微波混沌开腔。动态俘获的应用

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294591

G. Luna-Acosta, J. A. Méndez-Bermúdez

{"title":"Microwave Chaotic Open Cavities. Applications of Dynamical Trapping","authors":"G. Luna-Acosta, J. A. Méndez-Bermúdez","doi":"10.1109/MSMW.2007.4294591","DOIUrl":"https://doi.org/10.1109/MSMW.2007.4294591","url":null,"abstract":"We consider 2D microwave open cavities whose ray dynamics is chaotic. In particular, we estudy theoretically and experimentally, cavities which yield mixed (chaotic ad regular) phase space. Such cavities are connected to leads to form electromagnetic waveguides with single or multiple cavities. The principal feature of mixed chaos is the existence of islands of stability (resonance islands) in phase space. In this paper we focus on cavities yielding a single large resonance island. Ray trajectories within this island are trapped within the cavity and hence are not accessible to rays incoming from the leads. However the wave behavior is drastically different: at resonant frequencies, the incoming waves penetrate into these regions. We call this dynamical trapping and use it for the design of various multicavity resonators. We show some experimental evidence of dynamical trapping in a microwave experiment. We also discuss possible applications of dynamical trapping in multicavities for microlasers, electro-optical beam splitters, and switches. For these 2D systems there is a complete analogy between the field equation governing the microwave propagation, the Helmholtz equation and that of the quantum problem, the Schroedinger equation. Hence our results are directly pertinent to microscopic electron wave guides in the ballistic regime.","PeriodicalId":235293,"journal":{"name":"2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116671590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic Structure and Microwave Properties of La0.7Sr0.3MnO3 Ultrafine Particles La0.7Sr0.3MnO3超细粒子的磁性结构和微波性能

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294599

V. Krivoruchko, A. Marchenko, A. Mazur, A. Prokhorov

{"title":"Magnetic Structure and Microwave Properties of La0.7Sr0.3MnO3 Ultrafine Particles","authors":"V. Krivoruchko, A. Marchenko, A. Mazur, A. Prokhorov","doi":"10.1109/MSMW.2007.4294599","DOIUrl":"https://doi.org/10.1109/MSMW.2007.4294599","url":null,"abstract":"The effect of particle size on magnetic and microwave properties has been investigated on a series of La0.7Sr0.3MnO3 nanoparticles (NPs), with particles size 12 nm, 50 nm and 100-200 nm. Detailed studies of both 55Mn nuclear magnetic resonance and superparamagnetic resonance spectrum, completed by magnetic measurements, have been performed to obtain microscopic information on the local magnetic structure of the NP. The results on nuclear dynamics provide direct evidence of formation at the particle surface of a magnetically disordered layer of the thickness ap 1.5-2 nm. Temperature dependences of the magnetic resonance spectra have been measured for both 12 nm and 50-200 nm nanopowders. For an assembly of single domain 12 nm NPs electron paramagnetic resonance spectrum at 300 K shows a relatively narrow sharp line, while, as the temperature lowers to 5 K, the apparent resonance field decreases and the line width considerably increases. Computer simulations of the spectra have been carried out within the model when NPs are considered as superparamagnetic particles with randomly oriented magnetic moments and thermal fluctuations of anisotropy axes direction. The single set of parameters provides good fits to the spectra recoded in the whole temperature range (5 divide 300 K). Our results support the conclusion that particle of La0.7Sr0.3MnO3 of size ap 10 nm still keeps the important properties of the bulk material, that are of great relevance for spin-electronic devices based on an exploration of the nanoscale magnetism of manganites and their half-metallic properties.","PeriodicalId":235293,"journal":{"name":"2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117042078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear Effects in the Layered Semiconductor Structures 层状半导体结构中的非线性效应

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294622

A. Bulgakov, O. Shramkova

引用次数: 0

Low-Noise pHEMT Amplifier Operating at Extra-Low Supply Voltage and Power 低噪声pHEMT放大器工作在超低电源电压和功率

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294799

A. Korolev, V. Shulga

引用次数: 1

Microwave Conductivity of d-Wave Superconductors d波超导体的微波导电性

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294670

A. Kasatkin

引用次数: 9

Variable Beam Width MMW Band Antenna 变波束宽度毫米波波段天线

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294781

S. Shilo, Y. Sidorenko

引用次数: 0

Radiometric 5 mm Wavelength Receiver 辐射5毫米波长接收器

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294808

S. Kuzmin, Y. Muskin, V. Radzikhovsky

引用次数: 1

Microwave Spectrum of 2-Methylmalonaldehyde: Analysis of the Hydrogen-Transfer and Internal-Rotation Motions 2-甲基丙二醛的微波光谱:氢转移和内旋运动的分析

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294832

V. Ilyushin, E. Alekseev, Y. Chou, J. T. Hougen, F. Lovas, L. B. Picraux

引用次数: 0

A Planar Millimeter Wave Antenna 平面毫米波天线

2007 International Kharkov Symposium Physics and Engrg. of Millimeter and Sub-Millimeter Waves (MSMW) Pub Date : 2007-06-25 DOI: 10.1109/MSMW.2007.4294782

S. Andrenko, P. N. Melezhik, S. Provalov, Y. Sidorenko

引用次数: 1