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Mushroom Mesa Structure for InAlAs–InGaAs Avalanche Photodiodes 用于 InAlAs-InGaAs 雪崩光电二极管的蘑菇状 Mesa 结构
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900819
N. A. Maleev, A. G. Kuzmenkov, M. M. Kulagina, A. P. Vasyl’ev, S. A. Blokhin, S. I. Troshkov, A. V. Nashchekin, M. A. Bobrov, A. A. Blokhin, K. O. Voropaev, V. E. Bugrov, V. M. Ustinov
{"title":"Mushroom Mesa Structure for InAlAs–InGaAs Avalanche Photodiodes","authors":"N. A. Maleev, A. G. Kuzmenkov, M. M. Kulagina, A. P. Vasyl’ev, S. A. Blokhin, S. I. Troshkov, A. V. Nashchekin, M. A. Bobrov, A. A. Blokhin, K. O. Voropaev, V. E. Bugrov, V. M. Ustinov","doi":"10.1134/s1063785023900819","DOIUrl":"https://doi.org/10.1134/s1063785023900819","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Mushroom mesa structure for InAlAs/InGaAs avalanche photodiodes (APD) was proposed and investigated. APD heterostructrures were grown by molecular-beam epitaxy. Fabricated APDs with the sensitive area diameter of about 30 micron were passivated by SiN deposition and demonstrated avalanche breakdown voltage <i>V</i><sub>br</sub> 70–80 V. At the applied bias of 0.9 <i>V</i><sub>br</sub>, the dark current was 75–200 nA. The single-mode coupled APDs demonstrated responsivity at a gain of unity higher than 0.5 A/W at 1550 nm.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"166 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Period of Droplet Quasi-Bessel Beam Generated with the Round-Tip Axicon 使用圆尖轴心线产生的液滴准贝塞尔光束的周期
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023010261
V. Yu. Mylnikov, D. V. Chistyakov, S. H. Abdulrazak, N. G. Deryagin, Yu. M. Zadiranov, S. N. Losev, V. V. Dudelev, G. S. Sokolovskii
{"title":"Period of Droplet Quasi-Bessel Beam Generated with the Round-Tip Axicon","authors":"V. Yu. Mylnikov, D. V. Chistyakov, S. H. Abdulrazak, N. G. Deryagin, Yu. M. Zadiranov, S. N. Losev, V. V. Dudelev, G. S. Sokolovskii","doi":"10.1134/s1063785023010261","DOIUrl":"https://doi.org/10.1134/s1063785023010261","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>We demonstrate the experimental study of the axial intensity distribution of a quasi-Bessel beam with a droplet structure of the central core, formed by an axicon with the round-tip, and the results of the theoretical calculations. We show that the period of droplet quasi-Bessel beam is determined by the shape of the surface rounding and the angle at the top of the axicon lens and depends on the distance to it. The analysis of this dependence makes it possible to restore the shape of the round-tip of the axicon without 3D scanning.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"2 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Piezoceramic Resistance to Radiation Amorphization During Operation in ITER 压电陶瓷在国际热核聚变实验堆运行期间的抗辐射非晶化能力
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900443
E. E. Mukhin, E. P. Smirnova, N. A. Babinov, I. A. Khodunov, R. S. Smirnov, M.S. Kuligin
{"title":"Piezoceramic Resistance to Radiation Amorphization During Operation in ITER","authors":"E. E. Mukhin, E. P. Smirnova, N. A. Babinov, I. A. Khodunov, R. S. Smirnov, M.S. Kuligin","doi":"10.1134/s1063785023900443","DOIUrl":"https://doi.org/10.1134/s1063785023900443","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Piezoelectric motors designed for operation in the ITER tokamak-reactor must be tested for stability under severe radiation conditions. Properties of lead zirconate-titanate that is the most common type of piezoelectric materials were analyzed from the point of view on influence of radiation. It is shown that, at the expected in ITER level of radiation, this piezoceramics has a good potential for resistance to radiation induced amorphization and depolarization.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"222 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140125336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hybrid Сoncentrator-Planar Photovoltaic Module with Heterostructure Solar Cells 采用异质结构太阳能电池的混合型单聚光器-平面光伏组件
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900558
M. Z. Shvarts, A. V. Andreeva, D. A. Andronikov, K. V. Emtsev, V. R. Larionov, M. V. Nakhimovich, P. V. Pokrovskiy, N. A. Sadchikov, S. A. Yakovlev, D. A. Malevskiy
{"title":"Hybrid Сoncentrator-Planar Photovoltaic Module with Heterostructure Solar Cells","authors":"M. Z. Shvarts, A. V. Andreeva, D. A. Andronikov, K. V. Emtsev, V. R. Larionov, M. V. Nakhimovich, P. V. Pokrovskiy, N. A. Sadchikov, S. A. Yakovlev, D. A. Malevskiy","doi":"10.1134/s1063785023900558","DOIUrl":"https://doi.org/10.1134/s1063785023900558","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The paper presents a promising solution for photovoltaic modules that provides overcoming the main conceptual limitation for the concentrator concept in photovoltaics—the impossibility to convert diffused (scattered) solar radiation coming to the panel of sunlight concentrators. The design of a hybrid concentrator-planar photovoltaic module based on heterostructure solar cells: A3B5 triple-junction and Si-HJT is presented. The results of initial outdoor studies of the module output characteristics are discussed and estimates of its energy efficiency are given.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"2 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140125338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 1D Quasilinear Equation Describing the Current Drive Excitation by Helicons in a Tokamak Plasma 描述托卡马克等离子体中氦子电流驱动激励的一维准线性方程
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900480
A. Yu. Popov, E. Z. Gusakov
{"title":"A 1D Quasilinear Equation Describing the Current Drive Excitation by Helicons in a Tokamak Plasma","authors":"A. Yu. Popov, E. Z. Gusakov","doi":"10.1134/s1063785023900480","DOIUrl":"https://doi.org/10.1134/s1063785023900480","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>A quasilinear equation which allows describing evolution of the electron distribution function and generation of non-inductive currents by helicons is obtained. It is shown that in the analyzed case the Fokker–Planck equation can be approximated by a one-dimensional equation in the longitudinal electron velocity space with a diffusion coefficient proportional to the helicon power absorbed by electrons due to Landau damping.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"222 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140125343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Increasing the Efficiency of Triple-Junction Solar Cells Due to the Metamorphic InGaAs Subcell 利用非晶态 InGaAs 子电池提高三结太阳能电池的效率
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900431
M. A. Mintairov, V. V. Evstropov, S. A. Mintairov, M. V. Nakhimovich, R. A. Saliy, M. Z. Shvarts, N. A. Kalyuzhniy
{"title":"Increasing the Efficiency of Triple-Junction Solar Cells Due to the Metamorphic InGaAs Subcell","authors":"M. A. Mintairov, V. V. Evstropov, S. A. Mintairov, M. V. Nakhimovich, R. A. Saliy, M. Z. Shvarts, N. A. Kalyuzhniy","doi":"10.1134/s1063785023900431","DOIUrl":"https://doi.org/10.1134/s1063785023900431","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>\u0000</h3><p>The efficiency of GaInP/GaAs/In<sub><i>x</i></sub>Ga<sub>1 –</sub> <sub><i>x</i></sub>As triple-junction solar cells obtained by replacing (in the widely used “classical” GaInP/GaAs/Ge heterostructure) the lower germanium with In<sub><i>x</i></sub>Ga<sub>1 –</sub> <sub><i>x</i></sub>As subcell formed using the metamorphic growth technology has been investigated. Based on an original approach, the optimal indium concentration in the narrow-gap subcell has been found. The main parameters of In<sub><i>x</i></sub>Ga<sub>1 –</sub> <sub><i>x</i></sub>As subcells with an indium concentration from <i>x</i> <b><i>=</i></b> 0.11 to 0.36 were determined and were used to calculate the IV characteristics of GaInP/GaAs/In<sub><i>x</i></sub>Ga<sub>1 –</sub> <sub><i>x</i></sub>As solar cells. It has been determined that at <i>x</i> <b><i>=</i></b> 0.28 the efficiency of the triple-junction solar cell increases by 3.4% (abs.) in comparison with the “classical” solar cell, reaching a value of 40.3% (AM1.5D). Also it has been shown that the efficiency of such solar cells can be increased up to 41%.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"15 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140125362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal Conductivity of Hybrid SiC/Si Substrates for the Growth of LED Heterostructures 用于生长 LED 异质结构的混合碳化硅/硅基底的热传导率
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023010200
S. A. Kukushkin, L. K. Markov, A. V. Osipov, G. V. Svyatets, A. E. Chernyakov, S. I. Pavlov
{"title":"Thermal Conductivity of Hybrid SiC/Si Substrates for the Growth of LED Heterostructures","authors":"S. A. Kukushkin, L. K. Markov, A. V. Osipov, G. V. Svyatets, A. E. Chernyakov, S. I. Pavlov","doi":"10.1134/s1063785023010200","DOIUrl":"https://doi.org/10.1134/s1063785023010200","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>the thermal characteristics of SiC/Si samples obtained by the method of coordinated substitution of atoms at different thicknesses of SiC have been experimentally investigated. It has been found that for SiC thicknesses less than 200 nm, the thermal resistance of SiC/Si is approximately equal to 2 K/W, which is the same as for pure silicon substrate. Such samples will perfectly remove heat from the light-emitting heterostructure grown on SiC/Si. With an increase in the thickness of SiC, the SiC film is detached, which leads to a loss of thermal contact between SiC and Si. The thermal resistance increases at the same time by more than two orders of magnitude. The ability to remove easily the opaque part of the substrate can form the basis of the technology for manufacturing flip-chip LED.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"49 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140155542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Nitrogen Plasma Treatment on the Structural and Optical Properties of InGaN 氮等离子体处理对 InGaN 结构和光学特性的影响
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s106378502390073x
V. O. Gridchin, I. P. Soshnikov, R. R. Reznik, S. D. Komarov, E. V. Pirogov, V. V. Lendyashova, K. P. Kotlyar, N. V. Kryzhanovskaya, G. E. Cirlin
{"title":"Effect of Nitrogen Plasma Treatment on the Structural and Optical Properties of InGaN","authors":"V. O. Gridchin, I. P. Soshnikov, R. R. Reznik, S. D. Komarov, E. V. Pirogov, V. V. Lendyashova, K. P. Kotlyar, N. V. Kryzhanovskaya, G. E. Cirlin","doi":"10.1134/s106378502390073x","DOIUrl":"https://doi.org/10.1134/s106378502390073x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of cooling conditions in the plasma-assisted molecular-beam epitaxy growth on the structural and optical properties of InGaN nanostructures is studied. It is shown that cooling of the samples without nitrogen plasma contributes to the suppression of phase separation in InGaN nanostructures. The integrated intensity of photoluminescence from these nanostructures increased by a factor of 2.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"14 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of the Effect of Nanosecond Laser Pulses Processing on the Microstructure and Fatigue Resistance of Commercially Pure Titanium 研究纳秒激光脉冲处理对商用纯钛微观结构和抗疲劳性的影响
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900753
Yu. R. Kolobov, S. S. Manokhin, V. I. Betekhtin, A. G. Kadomtsev, M. V. Narykova, G. V. Odintsova, G. V. Khramov
{"title":"Investigation of the Effect of Nanosecond Laser Pulses Processing on the Microstructure and Fatigue Resistance of Commercially Pure Titanium","authors":"Yu. R. Kolobov, S. S. Manokhin, V. I. Betekhtin, A. G. Kadomtsev, M. V. Narykova, G. V. Odintsova, G. V. Khramov","doi":"10.1134/s1063785023900753","DOIUrl":"https://doi.org/10.1134/s1063785023900753","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect has been studied of treatment with nanosecond laser pulses on the fatigue resistance of plate samples of recrystallized (grain size of the order of 2–3 pm) commercially pure titanium (grade VT1-0) under cyclic tensile loading. The results of investigations by scanning and transmission electron microscopy of the subsurface layer microstructure of the alloy under study after exposure to nanosecond laser irradiation and subsequent fatigue tests are presented.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"10 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
NMR Study of Nanocarbon Material/Nafion Interface in a Radio Absorbing Composite 无线电吸收复合材料中纳米碳材料/非离子界面的核磁共振研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023010145
N. V. Glebova, A. S. Mazur, A. O. Krasnova, I. V. Pleshakov, A. A. Nechitailov
{"title":"NMR Study of Nanocarbon Material/Nafion Interface in a Radio Absorbing Composite","authors":"N. V. Glebova, A. S. Mazur, A. O. Krasnova, I. V. Pleshakov, A. A. Nechitailov","doi":"10.1134/s1063785023010145","DOIUrl":"https://doi.org/10.1134/s1063785023010145","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>inorganic-polymer composites are widely used as radio-absorbing materials, the study of their properties is important from the point of view of improving technical characteristics. The results of the study of Nafion/thermoexpanded graphite and Nafion/carbon black composites by nuclear magnetic resonance and thermogravimetry are presented. The formation of new compounds at the contact boundaries of the components, leading to thermal stabilization of the composites, is shown. Differences between thermally expanded graphite and carbon black upon interaction with Nafion are discussed.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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