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Focused Ion Beam Milling of Ridge Waveguides of Edge-Emitting Semiconductor Lasers 聚焦离子束铣削边缘发射半导体激光器的脊波导
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023010285
A. S. Payusov, M. I. Mitrofanov, G. O. Kornyshov, A. A. Serin, G. V. Voznyuk, M. M. Kulagina, V. P. Evtikhiev, N. Yu. Gordeev, M. V. Maximov, S. Breuer
{"title":"Focused Ion Beam Milling of Ridge Waveguides of Edge-Emitting Semiconductor Lasers","authors":"A. S. Payusov, M. I. Mitrofanov, G. O. Kornyshov, A. A. Serin, G. V. Voznyuk, M. M. Kulagina, V. P. Evtikhiev, N. Yu. Gordeev, M. V. Maximov, S. Breuer","doi":"10.1134/s1063785023010285","DOIUrl":"https://doi.org/10.1134/s1063785023010285","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>We studied the influence of the focused ion beam milling of ridge waveguides on lasing parameters of edge-emitting lasers, based on a separate confinement double heterostructure. It is shown that there are three degrees of influence, according to the etching depth: modification of the waveguide properties only, a decrease in efficiency without changing the threshold current, and a simultaneous deterioration in the threshold current and efficiency with significant modification of the optical characteristics of the laser.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886761","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
Low-Voltage InP Heterostyristors for 50–150 ns Current Pulses Generation 用于产生 50-150 ns 电流脉冲的低电压 InP 异质晶体管
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s106378502390087x
S. O. Slipchenko, A. A. Podoskin, P. S. Gavrina, Yu. K. Kirichenko, N. V. Shuvalova, N. A. Rudova, V. A. Kapitonov, A. Yu. Leshko, I. V. Shushkanov, V. V. Zolotarev, V. A. Kryuchkov, N. A. Pikhtin, T. A. Bagaev, I. V. Yarotskaya, V. N. Svetogorov, Yu. L. Ryaboshtan, M. A. Ladugin, A. A. Marmalyuk, V. A. Simakov
{"title":"Low-Voltage InP Heterostyristors for 50–150 ns Current Pulses Generation","authors":"S. O. Slipchenko, A. A. Podoskin, P. S. Gavrina, Yu. K. Kirichenko, N. V. Shuvalova, N. A. Rudova, V. A. Kapitonov, A. Yu. Leshko, I. V. Shushkanov, V. V. Zolotarev, V. A. Kryuchkov, N. A. Pikhtin, T. A. Bagaev, I. V. Yarotskaya, V. N. Svetogorov, Yu. L. Ryaboshtan, M. A. Ladugin, A. A. Marmalyuk, V. A. Simakov","doi":"10.1134/s106378502390087x","DOIUrl":"https://doi.org/10.1134/s106378502390087x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Current switches based on low-voltage InP heterothyristors with a maximum blocking voltage of 20 V were developed and studied. In current pulse generation mode, the efficient operation of InP heterothyristors with a low-resistance load in the form of a capacitor was demonstrated. It has been shown that the minimum turn-on delay time is about 6 ns at a control current amplitude of 60 mA. The possibility of generating current pulses with a duration of 53–154 ns and amplitudes of 38–130 A was demonstrated when the capacitor values were changed in the range of 56–1000 nF.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886580","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
Information Encoding Using Two-Level Generation in a Quantum Dot Laser 利用量子点激光器中的两级生成进行信息编码
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900832
M. V. Maximov, Yu. M. Shernyakov, N. Yu. Gordeev, A. M. Nadtochiy, A. E. Zhukov
{"title":"Information Encoding Using Two-Level Generation in a Quantum Dot Laser","authors":"M. V. Maximov, Yu. M. Shernyakov, N. Yu. Gordeev, A. M. Nadtochiy, A. E. Zhukov","doi":"10.1134/s1063785023900832","DOIUrl":"https://doi.org/10.1134/s1063785023900832","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>We propose an approach for encoding and transmitting information based on the use of a quantum dot laser, which, depending on the injection current, emits either one of two or simultaneously two spectral components, with different wavelengths. When the laser is modulated by current, each lasing line is detected by an independent photodiode, and thus the information is encoded by both the intensity of each line and its wavelength.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886582","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
Optimization of Vertical Acceptance of a Magnet Mirror 磁镜垂直接收的优化
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900868
V. D. Sachenko, A. S. Antonov
{"title":"Optimization of Vertical Acceptance of a Magnet Mirror","authors":"V. D. Sachenko, A. S. Antonov","doi":"10.1134/s1063785023900868","DOIUrl":"https://doi.org/10.1134/s1063785023900868","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>\u0000</h3><p>The mirror type magnetic mass-analyzer axial aberration, caused by ions travelling through the mirror outside the median plane is estimated. A technique for the mass-analyzer acceptance optimization is given.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886672","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
Study of Ga2O3 Deposition by MOVPE from Trimethylgallium and Oxygen in a Wide Temperature Range 通过 MOVPE 在宽温度范围内从三甲基镓和氧气中沉积 Ga2O3 的研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900807
V. V. Lundin, S. N. Rodin, A. V. Sakharov, A. F. Tsatsulnikov, A. V. Lobanova, M. V. Bogdanov, R. A. Talalaev, Haiding Sun, Shibing Long
{"title":"Study of Ga2O3 Deposition by MOVPE from Trimethylgallium and Oxygen in a Wide Temperature Range","authors":"V. V. Lundin, S. N. Rodin, A. V. Sakharov, A. F. Tsatsulnikov, A. V. Lobanova, M. V. Bogdanov, R. A. Talalaev, Haiding Sun, Shibing Long","doi":"10.1134/s1063785023900807","DOIUrl":"https://doi.org/10.1134/s1063785023900807","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Study of Ga<sub>2</sub>O<sub>3</sub> deposition by MOVPE using trimethylgallium and oxygen was performed in a wide temperature range. It was found that for Ga<sub>2</sub>O<sub>3</sub> deposition rate vs temperature dependence is very close to the TMGa pyrolysis in nitrogen. Kinetically-limited range for these processes corresponds to 550–700°C, that is 150°C higher, then for GaN deposition in the same reactor.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886701","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
Synthesis of Thin Single-Crystalline α-Cr2O3 Layers on Sapphire Substrates by Ultrasonic-Assisted Chemical Vapor Deposition 通过超声波辅助化学气相沉积在蓝宝石基底上合成薄单晶 α-Cr2O3 层
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023010273
V. I. Nikolaev, R. B. Timashov, A. I. Stepanov, S. I. Stepanov, A. V. Chikiryaka, M. P. Shcheglov, A. Ya. Polyakov
{"title":"Synthesis of Thin Single-Crystalline α-Cr2O3 Layers on Sapphire Substrates by Ultrasonic-Assisted Chemical Vapor Deposition","authors":"V. I. Nikolaev, R. B. Timashov, A. I. Stepanov, S. I. Stepanov, A. V. Chikiryaka, M. P. Shcheglov, A. Ya. Polyakov","doi":"10.1134/s1063785023010273","DOIUrl":"https://doi.org/10.1134/s1063785023010273","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Single-crystalline α-Cr<sub>2</sub>O<sub>3</sub> layers were synthesized on a sapphire substrate with a basal orientation in a laboratory reactor using ultrasonic-assisted chemical vapor deposition in the temperature range of 700–850°C. The influence of the growth temperature on the structural quality of the layer was studied by X-ray diffraction. At a growth temperature of 800°C, continuous layers with a thickness of about 1 μm were obtained. The layers were transparent in the visible region with a slightly greenish tint and showed some light transmission up to wavelengths of ~350 nm. The full width at half maximum of the rocking curve for reflection 0006 was ~300 arcsec.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886762","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 Decomposition of Polymethylmethacrylate and Its Composite with Fullerene C60 after Ultraviolet Irradiation 紫外线照射后聚甲基丙烯酸甲酯及其与富勒烯 C60 的复合材料的热分解
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023900510
A. O. Pozdnyakov
{"title":"Thermal Decomposition of Polymethylmethacrylate and Its Composite with Fullerene C60 after Ultraviolet Irradiation","authors":"A. O. Pozdnyakov","doi":"10.1134/s1063785023900510","DOIUrl":"https://doi.org/10.1134/s1063785023900510","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The analysis of the ultraviolet induced transformation of the thermal decomposition spectra of the monomer of the submicrometer layers of polymethylmethacrylate and its composite with fullerene C<sub>60</sub> for different fullerene concentrations and irradiation doses has been carried out. Formation of the new decomposition stages in the spectra has been interpreted by the binding between C<sub>60</sub> and side ester groups of polymethylmethacrylate.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140125283","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
Features of Single-Mode Emission in 7.5–8.0 μm Range Quantum-Cascade Lasers with a Short Cavity Length 短腔长 7.5-8.0 μm 范围量子级联激光器的单模发射特性
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s106378502301008x
A. V. Babichev, E. S. Kolodeznyi, A. G. Gladyshev, D. V. Denisov, N. Yu. Kharin, A. D. Petruk, V. Yu. Panevin, S. O. Slipchenko, A. V. Lyutetskii, L. Ya. Karachinsky, I. I. Novikov, N. A. Pikhtin, A. Yu. Egorov
{"title":"Features of Single-Mode Emission in 7.5–8.0 μm Range Quantum-Cascade Lasers with a Short Cavity Length","authors":"A. V. Babichev, E. S. Kolodeznyi, A. G. Gladyshev, D. V. Denisov, N. Yu. Kharin, A. D. Petruk, V. Yu. Panevin, S. O. Slipchenko, A. V. Lyutetskii, L. Ya. Karachinsky, I. I. Novikov, N. A. Pikhtin, A. Yu. Egorov","doi":"10.1134/s106378502301008x","DOIUrl":"https://doi.org/10.1134/s106378502301008x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The possibility of realizing single-mode emission in quantum-cascade lasers due to modulation of output optical losses in a Fabry–Perot cavity is demonstrated. For the active region of the 7.5–8.0 μm spectral range, the two- phonon resonance design was used, thus, 50 stages and waveguide layers based on indium phosphide made it possible to realize single-mode 7.765 μm lasing at the temperature of 292 K. Side-mode suppression ratio was about 24 dB and remained the same with an increase in the current pumping up to 1.2 of the threshold current values. The coefficient of wavelength shift with temperature (temperature tuning) in the single-mode lasing regime was 0.56 nm/K.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886578","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
Electron Temperature Measurements at the Globus-M2 Tokamak using Multi-Laser Thomson Scattering 利用多激光汤姆逊散射测量 Globus-M2 托卡马克的电子温度
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023010212
G. S. Kurskiev, N. S. Zhiltsov, A. N. Koval, A. F. Kornev, A. M. Makarov, E. E. Mukhin, Yu. V. Petrov, N. V. Sakharov, V. A. Solovey, E. E. Tkachenko, S. Yu Tolstyakov, P. V. Chernakov
{"title":"Electron Temperature Measurements at the Globus-M2 Tokamak using Multi-Laser Thomson Scattering","authors":"G. S. Kurskiev, N. S. Zhiltsov, A. N. Koval, A. F. Kornev, A. M. Makarov, E. E. Mukhin, Yu. V. Petrov, N. V. Sakharov, V. A. Solovey, E. E. Tkachenko, S. Yu Tolstyakov, P. V. Chernakov","doi":"10.1134/s1063785023010212","DOIUrl":"https://doi.org/10.1134/s1063785023010212","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>diagnostics of the plasma electron component by the metho d of Thomson scattering <i>T</i><sub><i>e</i></sub>(<i>R</i>, <i>t</i>) of laser radiation makes it possible to reliably measure the spatial distributions of the electron temperature and density. One of the obstacles to the implementation of TS diagnostics in thermonuclear reactors is the distortion of the spectral characteristics of the optical system due to radiation-induced absorption and contamination of optical elements with erosion products of the first wall. As a consequence, the reliability of measurements by the TS method will decrease over time. The paper describes the method of multi-laser Thomson scattering, which will solve this problem. The results of the first experiments on the Globus-M2 tokamak are also presented.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886772","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
Size Distribution of Nanocrystalline Elements of the Polyethylene Structure 聚乙烯结构中纳米晶体元素的尺寸分布
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-03-14 DOI: 10.1134/s1063785023010133
V. M. Egorov, A. K. Borisov, V. A. Marikhin, L. P. Myasnikova, E. M. Ivan’kova
{"title":"Size Distribution of Nanocrystalline Elements of the Polyethylene Structure","authors":"V. M. Egorov, A. K. Borisov, V. A. Marikhin, L. P. Myasnikova, E. M. Ivan’kova","doi":"10.1134/s1063785023010133","DOIUrl":"https://doi.org/10.1134/s1063785023010133","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>a method for calculating the size distribution of nanocrystalline elements of the polymer structure is proposed. The longitudinal size distribution (thickness) of ultrahigh molecular weight polyethylene lamellae was calculated from calorimetric data. The results of calculating the maximum values of the distribution are consistent with the known data obtained by other methods.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886678","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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