Applied sciences

Opto-Electronics Review

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Opto-Electronics Review | 2024 | 32 | 2

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Abstract

Concentrator photovoltaic (CPV) systems have proven the capability of competing with traditional photovoltaic (PV) systems due to their high efficiency and low area occupancy. Such CPV systems require efficient heat removal auxiliary systems, especially for medium and high optical concentration ratios. Operating a CPV system under a high optical concentration (ratio > 200 X) might require active cooling techniques, which have high operating costs and maintenance. On the other hand, heat pipes (HPs) are widely used in electronic devices for cooling purposes. This work discusses the possibility of operating a CPV system coupled with HPs as a passive cooling technique. Two different HPs with different lengths are used to compare cooling efficiency. Each HP length was tested either in a single or double configuration. Long HPs showed better heat removal compared to a traditional fin-cooling system. CVP cooling with HP systems enhanced the entire electrical output of the cell, mainly at high optical concentration ratios.
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Authors and Affiliations

Mohammed Al Turkestani
1
ORCID: ORCID
Mohamed Sabry
1 2
ORCID: ORCID
Abdelrahman Lashin
1 3
ORCID: ORCID

  1. Physics Department, College of Science, Umm Al Qura University, Makkah, Kingdom of Saudi Arabia
  2. Solar Physics Lab, National Research Institute of Astronomy and Geophysics, Cairo, Egypt
  3. Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt
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Abstract

Absorption of the below-bandgap solar radiation and direct pre-thermalizational impact of a hot carrier (HC) on the operation of a single-junction solar cell are ignored by the Shockley-Queisser theory. The detrimental effect of the HC is generally accepted only via the thermalization-caused heating of the lattice. Here, the authors demonstrate experimental evidence of the HC photocurrent induced by the below-bandgap 0.92 eV photon energy radiation in an industrial silicon solar cell. The carriers are heated both through direct free-carrier absorption and by residual photon energy remaining after the electron-hole pair generation. The polarity of the HC photocurrent opposes that of the conventional generation photocurrent, indicating that the total current across the p-n junction is contingent upon the interplay between these two currents. A model of current-voltage characteristics analysis allowing us to obtain a reasonable value of the HC temperature was also proposed. This work is remarkable in two ways: first, it contributes to an understanding of HC phenomena in photovoltaic devices, and second, it prompts discussion of the HC photocurrent as a new intrinsic loss mechanism in solar cells.
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Authors and Affiliations

Ihor Zharchenko
1
Jonas Gradauskas
2
Oleksandr Masalskyi
1 2
Aleksej Rodin
1

  1. Laboratory of Electronic Processes, Center for Physical Sciences and Technology, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
  2. Department of Physics, Vilnius Gediminas Technical University, Saulėtekio Ave. 11, LT-10223 Vilnius, Lithuania
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Abstract

In this paper, the authors report strain-balanced M-structures InAs/GaSb/AlSb/GaSb superlattice growth on GaSb substrates using two kinds of interfaces (IFs): GaAs-like IFs and InSb-like IFs. The in-plane compressive strain of 60-period and 100-period InAs��/GaSb/AlSb��/GaSb with different InAs (��) and AlSb (��) monolayers are investigated. The M-structures InAs/GaSb/AlSb/GaSb represent type II superlattices (T2SL) and at present are under intensive investigation. Many authors show theoretical and experimental results that such structures can be used as a barrier material for a T2SL InAs/GaSb absorber tuned for long-wave infrared detectors (8 μm–14 μm). Beside that, M-structure can also be used as an active material for short-wave infrared detectors to replace InAs/GaSb which, for this region of infrared, are a big challenge from the point of view of balancing compression stress. The study of InAs/GaSb/AlSb/GaSb superlattice with the minimal strain for GaSb substrate can be obtained by a special procedure of molecular beam epitaxy growth through special shutters sequence to form both IFs. The authors were able to achieve smaller minimal mismatches of the lattice constants compared to literature. The high-resolution X-ray diffraction measurements prove that two types of IFs are proper for balancing the strain in such structures. Additionally, the results of Raman spectroscopy, surface analyses of atomic force microscopy, and differential interference contrast microscopy are also presented. The numerical calculations presented in this paper prove that the presence of IFs significantly changes the energy gap in the case of the investigated M-structures. The theoretical results obtained for one of the investigated structures, for a specially designed structure reveal an extra energy level inside the energy gap. Moreover, photoluminescence results obtained for this structure prove the good quality of the synthesized M-structures, as well as are in a good agreement with theoretical calculations.
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Authors and Affiliations

Michał Marchewka
1
ORCID: ORCID
Dawid Jarosz
1 2
ORCID: ORCID
Marta Ruszała
1
ORCID: ORCID
Anna Juś
1
ORCID: ORCID
Piotr Krzemiński
1
ORCID: ORCID
Ewa Bobko
1
ORCID: ORCID
Małgorzata Trzyna-Sowa
1
ORCID: ORCID
Renata Wojnarowska-Nowak
1
ORCID: ORCID
Paweł Śliż
1
ORCID: ORCID
Michał Rygała
3
ORCID: ORCID
Marcin Motyka
3
ORCID: ORCID

  1. Center for Microelectronics and Nanotechnology, Institute of Materials Engineering, University of Rzeszów,al. Rejtana 16, 35-959 Rzeszów, Poland
  2. International Research Centre MagTop, Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
  3. Laboratory for Optical Spectroscopy of Nanostructures, Department of Experimental Physics, Faculty of Fundamental Problems ofTechnology, Wrocław University of Science and Technology, ul. Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
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Abstract

The goals of this work are to design and develop a technology for fabrication and study of multifunctional properties of core/shell nanoparticles (NPs) as magnetic/luminescent markers. The new hybrid core/shell Fe3O4/Gd2O3:1% Er3+, 18% Yb3+, 2.5% Mg2+, x% Nd3+ NPs doped with different concentrations of neodymium ions, where x = 0%, 0.5%, 0.75%, 1%, 2%, 4%, were synthesized by the co-precipitation method. The NPs were characterised using XRD, TEM, SEM, EDX, confocal microscopy and photoluminescence. Fe3O4 (core) consists of several 13 nm NPs. The core/shell NPs have sizes from 220 nm to 641 nm. In this latter case, the shell thicknesses were 72, 80, and 121 nm. The upconversion efficiency properties and magnetic properties of the hybrid NPs were investigated. In the core/shell NPs, the addition of Nd3+ quenches the luminescence. The magnetic response of core/shell samples is rather paramagnetic and does not differ significantly from that registered for the shell material alone. For Gd2O3:1% Er3+, 18% Yb3+ and Fe3O4/Gd2O3:1% Er3+, 18% Yb3+, 2.5% Mg2+, 0.5% Nd3+, at 300 K, the values of the magnetization registered at ~ 40 kOe are similar and equal to ~ 5.3 emu·g−1. The survivability of the HeLa tumor cells with the presence of the core/shell NPs was investigated for 24 h. The NPs are non-toxic up to a concentration of 1000 µg·ml−1 and penetrate cells in the process of endocytosis which has been confirmed by confocal microscope studies.
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Authors and Affiliations

Izabela Kamińska
1
ORCID: ORCID
Kamil Sobczak
2
Yaroslav Zhydachevskyy
1
ORCID: ORCID
Tomasz Wojciechowski
1 3
ORCID: ORCID
Roman Minikayev 
1
ORCID: ORCID
Bożena Sikora-Dobrowolska
1
ORCID: ORCID
Sabina Lewińska
1
ORCID: ORCID
Michał Chojnacki
1 3
ORCID: ORCID
Krzysztof Fronc
1 3
ORCID: ORCID

  1. Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
  2. Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, ul. Żwirki i Wigury 101, Warsaw 02-089, Poland
  3. International Research Centre MagTop, al. Lotników 32/46, Warsaw 02-668, Poland
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Abstract

The main goal of the article is to present the concept of using a simulation environment when designing an advanced fibre-optic seismometer (FOS) using a field-programmable gate array (FPGA) computing system. The first part of the article presents the advanced requirements regarding the FOS principle of operation, as well as the measurement method using a closed-loop operation. The closed-loop control algorithm is developed using the high-level language C++ and then it is synthesised into an FPGA. The following part of the article describes the simulation environment developed to test the operation of the control algorithm. The environment includes a model of components of the measurement system, delays, and distortions in the signal processing path, and some of the measurement system surroundings. The article ends with a comparison of simulation data with measurements. The obtained results are consistent and prove correctness of the methodology adopted by the authors.
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Authors and Affiliations

Marek Kamiński
1
ORCID: ORCID
Wojciech Tylman
1
ORCID: ORCID
Grzegorz Jabłoński
1
ORCID: ORCID
Rafał Kotas
1
ORCID: ORCID
Piotr Amrozik
1
ORCID: ORCID
Bartosz Sakowicz
1
ORCID: ORCID
Leszek R. Jaroszewicz
2 3
ORCID: ORCID

  1. Department of Microelectronics and Computer Science, Lodz University of Technology, ul. Wolczanska 221, 93-005 Lodz, Poland
  2. Institute of Applied Physics, Military University of Technology, ul. gen. Sylwestra Kaliskiego 2, 00-908 Warszawa, Poland
  3. Elproma Elektronika Sp. z o.o., ul. Duńska 2A, 05-152 Czosnów, Poland
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Abstract

During the next generation of wireless cellular networks, the millimeter-wave (mm-wave) spectrum will bring new opportunities for exceptionally high data transfer speeds and extensive network connectivity. Millimeter waves, on the other hand, are subject to a significant loss of propagation, which is the most significant impediment. A beneficial solution to this difficulty, which can be overcome, is to use a beam-forming system that consists of many antennas. The purpose of this study is to provide a concept for an integrated photonic beam-forming system that utilises multiple ring resonators for a 1 × 4 phase array antenna operating in the Ka-Band frequency range. The waveguide technology is the foundation for a signal that operates at 28 GHz. It is through the use of the optical ring resonator that the actual time delay line may accomplish its goal. The suggested method can be imDuring the next generation of wireless cellular networks, the millimeter-wave (mm-wave) spectrum will bring new opportunities for exceptionally high data transfer speeds and extensive network connectivity. Millimeter waves, on the other hand, are subject to a significant loss of propagation, which is the most significant impediment. A beneficial solution to this difficulty, which can be overcome, is to use a beam-forming system that consists of many antennas. The purpose of this study is to provide a concept for an integrated photonic beam-forming system that utilises multiple ring resonators for a 1 × 4 phase array antenna operating in the Ka-Band frequency range. The waveguide technology is the foundation for a signal that operates at 28 GHz. It is through the use of the optical ring resonator that the actual time delay line may accomplish its goal. The suggested method can be implemented as a variable true time delay (TTD) line to change the radiation angle of phase array antennas (PAA). The main lobe radiated by the PAA can be directed squint-free between the angles from −28° to +28°. The mathematical analysis and design of the beam producing the structure are presented. Following that, delays of 650 ps, 350 ps, and 250 ps could be produced with coupling coefficients of κ = 0.5 , κ = 0.7, and κ = 0.9 , respectively, and the associated phase shifts were 0.469π, 0.146π, and 0.387π.plemented as a variable true time delay (TTD) line to change the radiation angle of phase array antennas (PAA). The main lobe radiated by the PAA can be directed squint-free between the angles from −28° to +28°. The mathematical analysis and design of the beam producing the structure are presented. Following that, delays of 650 ps, 350 ps, and 250 ps could be produced with coupling coefficients of κ = 0.5 , κ = 0.7, and κ = 0.9 , respectively, and the associated phase shifts were 0.469π, 0.146π, and 0.387π.
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Authors and Affiliations

Md. Danish Nadeem
1
Sanjeev Kumar Raghuwanshi
1
Ritesh Kumar
2

  1. Microwave Photonics Laboratory, Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad Jharkhand-826004, India
  2. Shri Phaneshwar Nath Renu Engineering College, Araria, Bihar 854318, India
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Abstract

Thermal image drift is observed in prevalent industrial-level cameras because their optomechanical design is not optimised to reduce this phenomenon. In this paper, the effect of temperature on industrial-level cameras is investigated, focusing on the thermal image drift resulting from ambient temperature changes and warming-up process. Standard methods for reducing thermal image drift are reviewed, concentrating on the lack of repeatability aspect of this drift. Repeatable thermal image drift is crucial for applying a compensation model as random thermal deformations in sensors cannot be compensated. Moreover, the possible cause of this issue is explored, and novel optomechanical camera modifications are proposed that maintain the thermal degrees of freedom for the deforming sensor, limiting the lack of repeatability aspect of thermal image drift to a low level. The improvement is verified by conducting experiments using a specialised test stand equipped with an invar frame and thermal chamber. Considering the results from the application of the polynomial compensation model, the standard deviation of the central shifts of image drift is reduced by ×3.99, and the absolute range of image drift is reduced by ×2.53.
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Authors and Affiliations

Marcin Adamczyk
1
ORCID: ORCID
Kohei Nimura
1

  1. Warsaw University of Technology, Faculty of Mechatronics, Institute of Micromechanics and Photonics, ul. Andrzeja Boboli 8,02-525 Warsaw, Poland
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Abstract

Visible light communication is seen as a crucial technology within optical wireless communication systems. The technology of vehicular visible light communication holds significant importance in the context of connected vehicles. This technology can serve as a supplementary solution to vehicular systems that are based on radio frequency. In this paper, the authors conduct an analysis of the performance of both line-of-sight and non-line-of-sight vehicle-to-vehicle visible light communication systems under the effect of artificial light source and weather conditions, including clear, hazy, and foggy weather. A practical vehicular laser diode, a street lamp, and an avalanche photodiode are used to design the proposed system model. Performance enhancement for the proposed system is achieved using an optical amplifier at the receiving end. An artificial light source of light-emitting diode Corn-type is used to represent an ambient artificial light source. Different metrics such as quality factor and bit error rate are used to assess the system performance of the non-line-of-sight-vehicular communication system. The proposed line-of-sight model achieves a data rate of 25 Gbps, supporting a distance of 80 m under clear sky and hazy atmospheric conditions. For foggy weather, an attainable link distance of 70 m is achieved. The achieved results emphasize the suitability of the suggested models for vehicular applications in real world environment.
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Authors and Affiliations

Nagwan I. Tawfik
1
ORCID: ORCID
Eslam S. El-Mokadem
1
Moustafa H. Aly
2
ORCID: ORCID
Walid S. El-Deeb
3

  1. Electronics and Communications Department, Higher Technological Institute, 10th of Ramadan city, Egypt
  2. Electronics and Communications Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport, Alexandria, Egypt
  3. Electronics and Communications Department, Zagazig University, 44519 Zagazig, Egypt
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Abstract

The work presents the results of a research on the photoacoustic spectra of thin surface layers of Cd1−xBexTe crystals formed by grinding and polishing their surfaces. As a result of matching the theoretical and experimental photoacoustic spectra, thermal and optical parameters of these layers were determined. Thermal parameters of the surface layers, such as thermal conductivity and thermal diffusivity, turned out to be much worse than the analogous parameters of the substrate. The increase in the optical absorption of surface layers for photon energies below Eg was also determined.

Eg was also determined.
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Authors and Affiliations

Leszek Bychto
1
ORCID: ORCID
Mirosław Maliński 
1
ORCID: ORCID
Łukasz Chrobak
1
ORCID: ORCID
Jacek Zakrzewski
2
ORCID: ORCID
Mohammed Boumhamdi
2
ORCID: ORCID

  1. Faculty of Electronics and Computer Studies, Technical University of Koszalin, ul. Śniadeckich 2, Koszalin, Poland
  2. Institute of Physics, Nicolaus Copernicus University, ul. Grudziądzka 5/7, 87-100 Torun, Poland
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Abstract

In current CubeSat observation satellites, the main design constraint is the available space. Standards dictating the unit dimensions of the payload severely restrict the maximum aperture and focal length of the optical instrument. In this paper, the authors present the results of work to produce a novel DeploScope optical system for a CubeSat-type observation satellite with a segmented aperture of the primary mirror deployed in space. The telescope is designed for Earth observation and is expected to find its application in the military, precision agriculture or environmental disaster prevention. The work includes a detailed analysis of the segment aperture effect on image repeatability for different numbers of main mirror segments. Based on it, the optimal configuration of the optical model of the telescope with an aperture of 188.5 mm and a focal length of 1100 mm was selected. Based on this analysis, a so-called laboratory version of the telescope was built, providing the possibility of free correction of each segment of the primary mirror while maintaining a solid stable base for other components of the module. Imaging tests were carried out on the laboratory version of the instrument and the system was optimized for a version suitable for implementation in the payload structure of the microsatellite.
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Authors and Affiliations

Paweł Knapkiewicz
Tymon Janisz
ORCID: ORCID
Grzegorz Charytoniuk
Michał Partyka
Tomasz Pozniak
Damian Stefanow
ORCID: ORCID
Jakub Chołodowski
ORCID: ORCID
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Abstract

The article considers the mechanisms of the formation of transverse energy flows in polychromatic fields with different structures. It is shown that the magnitude of the Poynting vector transverse component and the angular momentum for symmetric polychromatic beams are the same as in coherent monochromatic fields. Changes in the characteristics of energy flows due to the transformation and destruction of beam symmetry are demonstrated. The data of computer simulation are presented.
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Authors and Affiliations

Ihor I. Mokhun
Yurii K. Galushko
Christina V. Felde
Maksym D. Karabchiyvskiy
Yuliia Viktorovskaya
Oleksandr D. Val
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Abstract

The light scattering phenomenon in optical fibres has been implemented in several applications for years. Nowadays, commercial distributed sensing systems for temperature measurements – distributed temperature sensing (DTS) – are gaining more attention and are being applied in many fields. The DTS systems are commonly based on optical time domain reflectometry or optical frequency domain reflectometry analysis approaches. This paper presents the simulation model and primary experimental results of a novel approach for data analysis for DTS systems based on the measurement of the backscattered Raman anti-Stokes radiation: the optical transient-state domain reflectometry. The novelty of this approach is the fast and accurate proposed analysis algorithm, as well as the cost-effective, secure and reliable set-up, whose main aspect is the implementation of long, low-power input laser pulses.
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Authors and Affiliations

Iyad S. M. Shatarah
1
ORCID: ORCID
Robert Olbrycht
1
ORCID: ORCID
Bogusław Więcek
1
ORCID: ORCID

  1. Institute of Electronics, Lodz University of Technology, al. Politechniki 10, 93-590 Lodz, Poland
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Abstract

This paper presents a model of the capacitance and electrical properties of semiconductor lasers biased with modulated voltage. The model is based on the finite-element method (FEM), which is widely used in computer modelling and is a natural generalisation of a wellknown constant-voltage FEM electrical model. In principle, the model can be applied to any kind of device where inductance can be neglected. Here, it is applied to simulate the complex impedance and other high-frequency electrical properties of a vertical-cavity surface-emitting laser. These properties are very important for the application of such lasers in optical data transfer systems. The results show that both the diameter of the top mesa and the surface area of the top electrical contact have a strong impact on the performance of the laser. This impact is analysed as a function of the modulation frequency.
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Authors and Affiliations

Michał Wasiak
1
ORCID: ORCID
Robert P. Sarzała
1
ORCID: ORCID

  1. Institute of Physics, Lodz University of Technology, ul. Wólczańska 217/221, 93-005 Lodz, Poland

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Celem projektu jest wsparcie działalności wydawniczej Opto-Electronics Review w zakresie poprawy widoczności czasopisma na arenie krajowej i międzynarodowej oraz podwyższenia jakości edytorskiej prezentowanych treści.

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Opto-Electronics Review was established in 1992 for the publication of scientific papers concerning optoelectronics and photonics materials, system and signal processing. This journal covers the whole field of theory, experimental verification, techniques and instrumentation and brings together, within one journal, contributions from a wide range of disciplines. Papers covering novel topics extending the frontiers in optoelectronics and photonics are very encouraged. The main goal of this magazine is promotion of papers presented by European scientific teams, especially those submitted by important team from Central and Eastern Europe. However, contributions from other parts of the world are by no means excluded.

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