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Amplification of photoelectric injection in the photodiode based on large-grain cadmium telluride films 基于大颗粒碲化镉薄膜的光电二极管光电注入放大
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.157
A. Uteniyazov, K. Ismailov, A. Muratov, B. K. Dauletmuratov, A. Kamalov
The results of studies of photoelectric injection amplification in the Al–Al2O3–p-CdTe–Mo structure at high bias voltages for the forward current are presented. It has been shown that the spectral sensitivity reaches its maximum value Sλ = 8.4∙104 A/W, when the diode is illuminated with the “own” light at λ = 450 nm and V = 7 V, while when it is illuminated with the “impurity” light at λ = 950 nm Sλ = 4.3∙104 A/W under the same bias voltage. It has been established that when illuminating the structure with the “own” light, the positive feedback mechanism is realized, and when illuminating with “impurity” light, the parametric amplification mechanism is realized.
本文介绍了Al-Al2O3-p-CdTe-Mo结构在正向高偏置电压下光电注入放大的研究结果。结果表明,在λ = 450 nm、V = 7 V的“自身”光照射下,二极管的光谱灵敏度达到最大值,λ = 8.4∙104 A/W;在相同偏置电压下,在λ = 950 nm的“杂质”光照射下,二极管的光谱灵敏度达到最大值,λ = 4.3∙104 A/W。确定了用“自身”光照射结构时实现了正反馈机制,用“杂质”光照射结构时实现了参数放大机制。
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引用次数: 0
Dynamic performance analysis of lasing mode optical integrated device 激光模光学集成器件动态性能分析
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.196
S. Eladl, K. Sharshar, M. H. Saad
In this paper, the dynamic response of the optical gain of optical integrated device composed of a heterojunction bipolar transistor (HBT) and a laser diode (LD) has been numerically analyzed. This type of optical integrated device is called transistor laser (TL). First, the rate equation of LD has been solved to obtain its transfer function. Second, the overall transfer function of the whole structure has been analyzed numerically. The effect of HBT cutoff frequency on the amplitude and phase frequency response has been studied. The obtained results show that HBT has a strong influence on the device performance. In particular, higher values of HBT cutoff frequency result in lower amplitudes and higher phase values in the low-frequency range. The device is stable and has a fast response and high optical gain at higher frequencies. Therefore, it can be used as an optical amplifier or optical switch in high-speed optical systems.
本文对由异质结双极晶体管(HBT)和激光二极管(LD)组成的光集成器件的光增益动态响应进行了数值分析。这种类型的光学集成器件称为晶体管激光器(TL)。首先,求解LD的速率方程,得到其传递函数。其次,对整个结构的整体传递函数进行了数值分析。研究了HBT截止频率对幅频和相频响应的影响。所得结果表明,HBT对器件性能有很大影响。特别是,HBT截止频率越高,低频范围内的幅值越低,相位值越高。该器件稳定,在较高频率下具有快速响应和高光增益。因此,它可以用作高速光学系统中的光放大器或光开关。
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引用次数: 0
Magneto-optic Kerr effect in Gd20Co80 alloy Gd20Co80合金的磁光Kerr效应
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.203
V. G. Kudin, S. Rozouvan, V. S. Staschuk
The magneto-optical Kerr effect in Gd20Co80 alloy and cobalt thin films has been studied in a broad spectral range applying spectral ellipsometry experimental technique. The results of the experiments showed the complex nature of the complex Kerr angle dispersion curves. A quantum mechanical formalism for degenerate and non-degenerate Landau levels for quasi-free electrons in ferromagnetic material has been developed in order to analyze the experimental data. The equivalence of relations for off-diagonal dielectric tensor elements for non-degenerate Landau levels to the classical case of the motion of quasi-free electrons along circular trajectories in a magnetic field has been theoretically shown. The degenerate Landau levels in this approach are the result of motion of electrons in small confined volumes near rare-earth alloy atoms. Rotation of light polarization occurs in this case due to transitions between subbands having different magnetic quantum numbers. This theoretical approach allowed us to interpret in detail shapes and sign of the complex Kerr angle dispersion curves, which actually include the contributions of optical transitions between degenerate and non-degenerate energy levels. The complex Kerr angle sign is determined by the magnetization magnetic field direction for non-degenerate Landau levels and the Hund rule for degenerate Landau levels.
应用光谱椭偏实验技术,在宽光谱范围内研究了Gd20Co80合金和钴薄膜中的磁光克尔效应。实验结果表明了复克尔角色散曲线的复杂性。为了分析铁磁材料中准自由电子的简并朗道能级和非简并朗道能级的量子力学形式。从理论上证明了非简并朗道能级的非对角介电张量元与准自由电子在磁场中沿圆形轨迹运动的经典情况的等价关系。这种方法中的简并朗道能级是电子在稀土合金原子附近的小限制体积内运动的结果。在这种情况下,由于具有不同磁量子数的子带之间的跃迁,光偏振发生旋转。这种理论方法使我们能够详细解释复杂克尔角色散曲线的形状和符号,这实际上包括了简并能级和非简并能级之间的光学跃迁的贡献。复克尔角符号由非简并朗道能级的磁化磁场方向和简并朗道能级的亨德规则决定。
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引用次数: 0
Principles of creating the devices that are able to control the current flow in the second class conductors 制造能够控制第二类导体电流的装置的原理
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.137
Y. Bacherikov, O. B. Okhrimenko
From the position of conceptions inherent to semiconductor physics and semiconductor technology, the processes occurring in conductors of the second class, which take place due to the current flow in them, have been considered in this paper. It has been shown that using the several composite materials consisting of a porous matrix filled with an electrolyte enables to obtain multilayer structures, in which potential barriers appear in the electrolyte medium. These barriers are caused by the difference in properties inherent to layers of porous matrix. Considered here has been the prospect of creating the new devices based on the second-class conductors capable to control the direction and magnitude of the current flow in these conductors that are in a liquid state (in electrolytes). In other words, it was considered the possibility to obtain the ionic devices that are closest in their functional properties to basic electronic devices, such as diodes, transistors, etc.
本文从半导体物理和半导体技术固有的概念出发,考虑了第二类导体中由于电流流动而发生的过程。研究表明,使用由填充电解质的多孔基质组成的几种复合材料可以获得多层结构,其中电解质介质中出现势垒。这些屏障是由多孔基质层固有性质的差异引起的。这里考虑的是创造基于二级导体的新设备的前景,这些二级导体能够控制这些处于液态(电解质)的导体中电流的方向和大小。换句话说,人们认为有可能获得与基本电子器件(如二极管、晶体管等)功能性质最接近的离子器件。
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引用次数: 1
Compensation method for atmospheric attenuation of laser radiation in active electro-optical systems with dynamic spectral processing of optical signals 基于光信号动态光谱处理的有源电光系统激光辐射大气衰减补偿方法
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.211
L. Kupchenko, A. S. Rybiak, А.V. Ponomar
This paper describes the compensation method for atmospheric attenuation of laser radiation, which can be implemented in active electro-optical systems with pre-detector dynamic spectral processing of optical signals. In these electro-optical systems, the spectral flux of sensing radiation is formed using multispectral laser signals based on a priori information about the spectral reflectance of the target and background. The sensing signal formed in this way ensures maximum suppression of the background signal at the output of system with minimal attenuation of the target signal. The influence of atmospheric radiation attenuation on operation of an active electro-optical system with dynamic spectral processing has been analyzed. It has been shown that the laser radiation attenuation in the atmosphere significantly affects the efficiency of dynamic spectral processing of optical signals (leads to a decrease in the target image contrast). The developed compensation method for atmospheric attenuation of radiation in active electro-optical systems with dynamic spectral processing is based on the fact that the spectral intensity of the sensing radiation is formed not only on the basis of a priori data on spectral characteristics of the target and background, but also takes into account the spectral transmittance of the optical radiation propagation medium.
本文介绍了一种可用于对光信号进行预探测器动态光谱处理的有源电光系统的激光辐射大气衰减补偿方法。在这些电光系统中,传感辐射的光谱通量是利用基于目标和背景的光谱反射率先验信息的多光谱激光信号形成的。这样形成的传感信号保证了在系统输出端对背景信号的最大抑制,同时对目标信号的衰减最小。分析了大气辐射衰减对动态光谱处理有源电光系统工作的影响。研究表明,大气中的激光辐射衰减会显著影响光信号动态光谱处理的效率(导致目标图像对比度降低)。动态光谱处理的有源电光系统大气辐射衰减补偿方法是基于传感辐射的光谱强度不仅是根据目标和背景的光谱特性先验数据形成的,而且考虑了光辐射传播介质的光谱透射率。
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引用次数: 0
Nanophysics in modern medicine 现代医学中的纳米物理学
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.185
V. Lozovski, V. Lysenko, N. Rusinchuk
WNanophysics is rapidly developing for the recent couple of decades. Unique physical properties of materials at the nanoscale are the reason for this rapid development. Ideas, materials and structures of nanophysics have found their wide application in related fields of modern science, including biology and medicine. This short review is devoted to the application of nanophysics in modern medicine. The main focus was on application of ideas and physical phenomena of nanophysics in oncology and antiviral therapy. We have focused on the use of nanosystems both for tumor imaging and for the struggle against some types of tumors. The use of nanoparticles as nanocontainers for targeted drug delivery was briefly discussed. We also demonstrated how the effects of nanophysics can be used to develop new non-traditional methods of antiviral therapy. The focus of these methods was the idea of physical (field) action of nanoparticles on the viruses, which is based on the local-field enhancement effect that is the reason of ponderomotive forces acting on the viruses up to destruction of viral envelopes.
纳米物理学在近二十年来发展迅速。纳米材料独特的物理性质是其快速发展的原因。纳米物理学的思想、材料和结构在现代科学的相关领域得到了广泛的应用,包括生物学和医学。这篇简短的综述致力于纳米物理学在现代医学中的应用。主要讨论了纳米物理学的思想和物理现象在肿瘤学和抗病毒治疗中的应用。我们专注于纳米系统在肿瘤成像和对抗某些类型肿瘤方面的应用。简要讨论了纳米颗粒作为靶向药物递送的纳米容器的应用。我们还展示了纳米物理学的作用如何用于开发新的非传统抗病毒治疗方法。这些方法的重点是纳米颗粒对病毒的物理(场)作用的想法,这是基于局部场增强效应,这是作用于病毒的有源力直至破坏病毒包膜的原因。
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引用次数: 1
Field effects in electron-irradiated GaP LEDs 电子辐照GaP led的场效应
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.179
R. Vernydub, O. Kyrylenko, O. Konoreva, Y. Olikh, O. Radkevych, D. Stratilat, V. Tartachnyk
The paper presents the results of the study of field effects in non-irradiated and irradiated by electrons (E = 2 MeV, F = 8.2∙1016 cm–2) gallium phosphide (GaP) light emitting diodes (LEDs) under reverse bias. The avalanche multiplication of charge carriers and tunneling breakdown in the space charge region has been considered. An increase of breakdown voltage after electron irradiation has been revealed. The effects of the annealing of non-irradiated and irradiated diodes in the temperature range of 20 to 500 °C have been analyzed.
本文介绍了反向偏压下未辐照和受电子(E = 2 MeV, F = 8.2∙1016 cm-2)照射的磷化镓(GaP)发光二极管(led)的场效应研究结果。考虑了空间电荷区载流子的雪崩倍增和隧穿击穿。发现电子辐照后击穿电压升高。分析了未辐照和辐照二极管在20 ~ 500℃温度范围内退火的影响。
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引用次数: 0
Structural, vibrational and photodegradation properties of CuAl2O4 films CuAl2O4薄膜的结构、振动和光降解性能
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.164
L. Myroniuk, M. Dusheyko, V. Karpyna, D. Myroniuk, O. Bykov, O. Olifan, O. Kolomys, V. Strelchuk, A. Korchovyi, S. Starik, V. Tkach, A. Ievtushenko
Cu–Al–O thin films were grown on Si (111) substrates by using the reactive ion-beam sputtering (RIBS) method within the temperature range 80 to 380 °C. The effect of thermal annealing of Cu–Al–O films under various regimes of cooling on the microstructure, morphology, optical properties and photocatalytic activity were examined. The properties of annealed Cu–Al–O films were studied using atomic force microscope (AFM), energy dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectrometry (FTIR). The X-ray diffraction patterns show appearance only CuAl2O4 phase after thermal annealing of Cu–Al–O thin films at 900 °C. Raman scattering confocal measurements have also confirmed the presence of CuO phases in annealed Cu–Al–O samples. AFM results have indicated that the greatest RMS roughness is observed in CuAl2O4 films after temperature annealing under the fast cooling regime. Photodegradation of CuAl2O4 films was investigated using methyl orange as model pollutant. Present results indicate that CuAl2O4 photocatalysts are potential candidate for the practical application in photocatalytic degradation of organic compounds.
采用反应离子束溅射法,在80 ~ 380℃的温度范围内,在Si(111)衬底上生长Cu-Al-O薄膜。研究了不同冷却条件下Cu-Al-O薄膜的热退火对其微观结构、形貌、光学性能和光催化活性的影响。采用原子力显微镜(AFM)、能量色散x射线能谱(EDX)和傅里叶变换红外光谱(FTIR)研究了Cu-Al-O退火膜的性能。Cu-Al-O薄膜在900℃热退火后,x射线衍射图显示仅出现CuAl2O4相。拉曼散射共聚焦测量也证实了退火Cu-Al-O样品中CuO相的存在。AFM结果表明,在快速冷却条件下,温度退火后的CuAl2O4薄膜的RMS粗糙度最大。以甲基橙为模拟污染物,对CuAl2O4薄膜的光降解进行了研究。结果表明,CuAl2O4光催化剂在光催化降解有机化合物方面具有潜在的应用前景。
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引用次数: 1
Enhancement of radiation-induced EPR signal in bioapatites 辐射诱导的EPR信号在生物磷灰石中的增强
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.173
V. Nosenko, I. Vorona, S. Lemishko, I. Golovina, V. O. Yukhymchuk, S. Okulov, V. Neimash, V. Povarchuk, S. Solopan, A. Belous
Amplification of a dosimetric EPR signal in mineralized biological materials available in limited quantities has been demonstrated in this paper. Powders of irradiated enamel, dentin, and bone tissue were placed into silica ampoules with the outer diameter close to 1.4 mm. To amplify the signal, the dielectric insert in the form of cylinder with the outer radius 2.85 mm, the inner radius 0.75 mm, and the height 1.85 mm made of a high-κ and low-loss ceramic material BaTi4O9 + 8.5% ZnO has been used. It has been shown that maximum signal amplification (about an order of magnitude) has been achieved when the sample is completely inserted into this dielectric. It has been found that the line shape of the dosimetric signal is not distorted, if using the dielectric insert. Decomposition of the amplified EPR spectra allowed us to determine the relative contribution of two types of CO2– radicals to the dosimetric signal, which coincides with the literature data.
放大剂量计EPR信号在矿化生物材料可在有限的数量已证明在本文。将辐照后的牙釉质、牙本质和骨组织粉末放入外径接近1.4 mm的硅胶安瓿中。为了放大信号,采用高κ低损耗陶瓷材料BaTi4O9 + 8.5% ZnO制成外半径为2.85 mm、内半径为0.75 mm、高1.85 mm的圆柱形介电插入。结果表明,当样品完全插入该电介质中时,信号放大达到最大(约一个数量级)。研究发现,如果使用介电介质插入,剂量测量信号的线形不会失真。通过对放大后的EPR光谱的分解,我们确定了两种CO2自由基对剂量学信号的相对贡献,这与文献数据一致。
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引用次数: 1
Intelligent electronic-optical sensor for information-measurement system of detection and identification of ground and aerodynamic objects 用于地面和空气动力目标探测和识别的信息测量系统的智能光电传感器
Pub Date : 2022-06-30 DOI: 10.15407/spqeo25.02.219
Y. Lepikh, V. Santoniy, L. M. Budiyanskaya, V. Yanko, A. P. Balaban
This work describes an original intelligent electronic-optical (laser) sensor (EOS) operating in the infrared range for systems that detect ground and aerodynamic objects and send control commands to the executive devices of portable information-measurement systems using specified algorithms. EOS proposed here differs from the known analogues by its ability of early detection and recognition of high-speed special machinery objects and small-sized unmanned aircrafts. EOS generates and sends probing optical pulses in the direction of a monitored high-speed object, processes the reflected location signal and retrieves the object coordinates and motion parameters. The classification features of the object are determined from the parameters of optical location signal used for object identification with the account the specific nature of optical location information systems.
这项工作描述了一种原始的智能电子光学(激光)传感器(EOS),其工作在红外范围内,用于探测地面和空气动力学物体,并使用指定算法向便携式信息测量系统的执行设备发送控制命令。本文提出的EOS与已知的类似物的不同之处在于它能够对高速特殊机械物体和小型无人机进行早期检测和识别。EOS向被监测的高速物体方向产生并发送探测光脉冲,处理反射的位置信号,检索物体坐标和运动参数。考虑到光学定位信息系统的特殊性,从用于物体识别的光定位信号的参数来确定物体的分类特征。
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引用次数: 0
期刊
Semiconductor physics, quantum electronics and optoelectronics
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