Pub Date : 2021-12-22DOI: 10.1109/ICTP53732.2021.9744198
M. Karim, Taqui Shafiq, Md. Asif Siddique, M. Faisal
In this paper, numerical study of supercontinuum (SC) generation of a novel on-chip CMOS compatible 5 mm long air-clad SiN suspended core channel waveguide has been reported. The proposed waveguide is designed to be pumped at 1.55 μm wavelength with a pulse having a 20 kW power and a temporal width of 50 fs. Supercontinuum coverage ranging from 0.8 μm to 6 μm is observed, which can be utilized in various applications such as spectroscopy, optical coherence tomography, and biomedical imaging.
{"title":"Suspended Core SiN Channel Waveguide for Broadband Supercontinuum Generation","authors":"M. Karim, Taqui Shafiq, Md. Asif Siddique, M. Faisal","doi":"10.1109/ICTP53732.2021.9744198","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744198","url":null,"abstract":"In this paper, numerical study of supercontinuum (SC) generation of a novel on-chip CMOS compatible 5 mm long air-clad SiN suspended core channel waveguide has been reported. The proposed waveguide is designed to be pumped at 1.55 μm wavelength with a pulse having a 20 kW power and a temporal width of 50 fs. Supercontinuum coverage ranging from 0.8 μm to 6 μm is observed, which can be utilized in various applications such as spectroscopy, optical coherence tomography, and biomedical imaging.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130164151","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}
A distinct structure of photonic crystal fiber (PCF) that supports 238 orbital angular momentum modes (OAM) between 1.5 μm and 1.675 μm wavelength is proposed here. Numerical analysis by finite element method indicates better propagation characteristics that secure high-capacity optical data transmission. Due to the higher effective refractive index difference (>5.5×10−3) between the supported HEl+1,1 and EHl−1,1 modes, crosstalk between the guided modes is anticipated to be minimal. Additionally, flat dispersion enables greater light confinement in the propagation region resulting in low confinement loss (~10−13–10−9 dBm−1). The higher-order radial modes are suppressed with a narrow ring as the propagation region while maintaining a higher mode purity of over ~95%. The low nonlinear coefficient of ≤0.69 W−1km−1 indeed assures that the proposed PCF design is superior for OAM modes propagation.
{"title":"A Novel Design of Photonic Crystal Fiber for Robust Orbital Angular Momentum Transmission","authors":"Dipta Dutta, Md. Iftekher Hossain Upal, Sampad Ghosh","doi":"10.1109/ICTP53732.2021.9744196","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744196","url":null,"abstract":"A distinct structure of photonic crystal fiber (PCF) that supports 238 orbital angular momentum modes (OAM) between 1.5 μm and 1.675 μm wavelength is proposed here. Numerical analysis by finite element method indicates better propagation characteristics that secure high-capacity optical data transmission. Due to the higher effective refractive index difference (>5.5×10−3) between the supported HEl+1,1 and EHl−1,1 modes, crosstalk between the guided modes is anticipated to be minimal. Additionally, flat dispersion enables greater light confinement in the propagation region resulting in low confinement loss (~10−13–10−9 dBm−1). The higher-order radial modes are suppressed with a narrow ring as the propagation region while maintaining a higher mode purity of over ~95%. The low nonlinear coefficient of ≤0.69 W−1km−1 indeed assures that the proposed PCF design is superior for OAM modes propagation.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128869854","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}
Pub Date : 2021-12-22DOI: 10.1109/ICTP53732.2021.9744187
Ruhana Nishad, K. Shaha, Abdul Khaleque, Md. Sarwar Hosen, Md. Tarek Rahman
In this paper, an antiresonant hollow core fiber, having a triple cladding arrangement, is presented. The addition of a third cladding ring in an optimized geometry leads to three orders of loss reduction compared to the double cladding ring fibers resulting in lowest leakage loss of 5.82×10−5 dB/km at 1.06 μm wavelength. The fiber also exhibits an excellent single mode performance with the maximum higher order mode extinction ratio of 106 and relatively low bending loss of 9.00×10−4 dB/km while the bend radius is 14 cm. Therefore, the presented fiber may have possible applications in high power laser delivery.
{"title":"Low Loss Triple Cladding Antiresonant Hollow Core Fiber","authors":"Ruhana Nishad, K. Shaha, Abdul Khaleque, Md. Sarwar Hosen, Md. Tarek Rahman","doi":"10.1109/ICTP53732.2021.9744187","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744187","url":null,"abstract":"In this paper, an antiresonant hollow core fiber, having a triple cladding arrangement, is presented. The addition of a third cladding ring in an optimized geometry leads to three orders of loss reduction compared to the double cladding ring fibers resulting in lowest leakage loss of 5.82×10−5 dB/km at 1.06 μm wavelength. The fiber also exhibits an excellent single mode performance with the maximum higher order mode extinction ratio of 106 and relatively low bending loss of 9.00×10−4 dB/km while the bend radius is 14 cm. Therefore, the presented fiber may have possible applications in high power laser delivery.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115578800","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}
Pub Date : 2021-12-22DOI: 10.1109/ICTP53732.2021.9744173
Arnob Roy Shaon, Tasnim Hasan, S. A. Mahmood
In the field of medical diagnosis, x-ray imaging is one of the most significant branches. Presently, highly researched halide based perovskites can be interesting candidates for x-ray detection. However, the presence of toxic lead in halide based perovskites has made a surge in research to enhance the x-ray performance of image detectors using a variety of possible photoconductors. This paper demonstrates the x-ray imaging performance of AgBi2I7 rudorffite single crystal. The maximum sensitivity of AgBi2I7 has been found to be 312.53 μCGyair−1cm−2 with an optimum thickness of 0.08 mm under an electric field of 2.00 V/mm for mammography. For chest radiography, a sensitivity of 2870.61 μCGyair−1cm−2 with an optimum thickness of 0.28 mm under an electric field of 2.00 V/mm has been found. Furthermore, the AgBi2I7 detector with a photoconductor thickness of 1 mm, under a low applied electric field of 0.38 V/mm shows a charge collection and absorption-limited sensitivity of 158.88 μCGyair−1cm−2 and a sensitivity of 282.87 μCGyair−1cm−2 from the slope of the photocurrent density versus dose rate characteristics. Our theoretical analysis suggests AgBi2I7 rudorffite single crystal can replace presently mainstreamed amorphous selenium (a-Se) in diagnostic x-ray imaging.
{"title":"Performance Evaluation of AgBi2I7 Based Direct Conversion X-ray Detector","authors":"Arnob Roy Shaon, Tasnim Hasan, S. A. Mahmood","doi":"10.1109/ICTP53732.2021.9744173","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744173","url":null,"abstract":"In the field of medical diagnosis, x-ray imaging is one of the most significant branches. Presently, highly researched halide based perovskites can be interesting candidates for x-ray detection. However, the presence of toxic lead in halide based perovskites has made a surge in research to enhance the x-ray performance of image detectors using a variety of possible photoconductors. This paper demonstrates the x-ray imaging performance of AgBi<inf>2</inf>I<inf>7</inf> rudorffite single crystal. The maximum sensitivity of AgBi<inf>2</inf>I<inf>7</inf> has been found to be 312.53 μCGy<inf>air</inf> <sup>−1</sup>cm<sup>−2</sup> with an optimum thickness of 0.08 mm under an electric field of 2.00 V/mm for mammography. For chest radiography, a sensitivity of 2870.61 μCGy<inf>air</inf> <sup>−1</sup>cm<sup>−2</sup> with an optimum thickness of 0.28 mm under an electric field of 2.00 V/mm has been found. Furthermore, the AgBi<inf>2</inf>I<inf>7</inf> detector with a photoconductor thickness of 1 mm, under a low applied electric field of 0.38 V/mm shows a charge collection and absorption-limited sensitivity of 158.88 μCGy<inf>air</inf> <sup>−1</sup>cm<sup>−2</sup> and a sensitivity of 282.87 μCGy<inf>air</inf> <sup>−1</sup>cm<sup>−2</sup> from the slope of the photocurrent density versus dose rate characteristics. Our theoretical analysis suggests AgBi<inf>2</inf>I<inf>7</inf> rudorffite single crystal can replace presently mainstreamed amorphous selenium (a-Se) in diagnostic x-ray imaging.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116764050","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}
Pub Date : 2021-12-22DOI: 10.1109/ICTP53732.2021.9744242
K. M. Sayem Bin Rahmotullah, Adnan Hosen, Sheikh Rashel Al Ahmed
In this paper, we propose a novel charge trapping memory (CTM) device structure consisting of Si/TiO2/Al2O3/Si3N4/SiO2/Si (STANOS), where Al2O3 as blocking oxide and TiO2 as capping layers have been employed. The SILVACO Technology Computer-Aided Design (TCAD) simulation software is used to model and study the performance of the proposed CTM device. A comparative investigation of the memory performances amid the conventional silicon-oxide-nitride-oxide-silicon (SONOS) and the proposed STANOS is provided. It is found that the STANOS structure with Al2O3 blocking oxide and TiO2 capping layers shows faster programming and erasing speeds than the conventional SONOS structure. Al2O3 having higher barrier height impacts on better blocking efficiency with enhancing programming speed and TiO2 capping layer with modest dielectric constant suppresses electron injection during erasing operation. In addition, blocking layer with capping minimizes the electron emission during charge retention. These results will be useful to develop low-cost and low power consumption nitride-based CTM devices with better programming and erasing speeds.
{"title":"Enhanching memory performance in silicon nitride-based charge trapping memory device with Al2O3 blocking oxide and TiO2 capping layers","authors":"K. M. Sayem Bin Rahmotullah, Adnan Hosen, Sheikh Rashel Al Ahmed","doi":"10.1109/ICTP53732.2021.9744242","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744242","url":null,"abstract":"In this paper, we propose a novel charge trapping memory (CTM) device structure consisting of Si/TiO<inf>2</inf>/Al<inf>2</inf>O<inf>3</inf>/Si<inf>3</inf>N<inf>4</inf>/SiO<inf>2</inf>/Si (STANOS), where Al<inf>2</inf>O<inf>3</inf> as blocking oxide and TiO<inf>2</inf> as capping layers have been employed. The SILVACO Technology Computer-Aided Design (TCAD) simulation software is used to model and study the performance of the proposed CTM device. A comparative investigation of the memory performances amid the conventional silicon-oxide-nitride-oxide-silicon (SONOS) and the proposed STANOS is provided. It is found that the STANOS structure with Al<inf>2</inf>O<inf>3</inf> blocking oxide and TiO<inf>2</inf> capping layers shows faster programming and erasing speeds than the conventional SONOS structure. Al<inf>2</inf>O<inf>3</inf> having higher barrier height impacts on better blocking efficiency with enhancing programming speed and TiO<inf>2</inf> capping layer with modest dielectric constant suppresses electron injection during erasing operation. In addition, blocking layer with capping minimizes the electron emission during charge retention. These results will be useful to develop low-cost and low power consumption nitride-based CTM devices with better programming and erasing speeds.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122723280","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}
Pub Date : 2021-12-22DOI: 10.1109/ICTP53732.2021.9744235
Sihabul Islam, Md Liakot Ali, Rinath Ruhana
System on a Chip (SoC) is the state of the art in VLSI design and automation today due to its impressive performance matrix in terms of power, speed, area, and design time. This paper presents the design of a SoC implementing the double AES crypto processor for better security than its single core. AES has been proved the most secured symmetric cryptographic algorithm certified by USA Govt. So, its hardware implementation using SoC technology is expected to offer much better performance than that of software implementation. The chip is designed using industry-standard Verilog HDL and simulated in Altera Quartus II EDA environment. Two different symmetric keys are used to encrypt and decrypt plaintext. Moreover, mixed columns, and substitution byte functions are simplified to minimize the complexity of the proposed design. The experimental study shows that the proposed AES crypto-processor SoC outperforms the existing works in terms of power requirement.
片上系统(SoC)是当今VLSI设计和自动化领域的最新技术，因为它在功率、速度、面积和设计时间方面具有令人印象深刻的性能矩阵。本文提出了一种采用双AES加密处理器的SoC设计方案，以提高其安全性。AES已被证明是美国政府认证的最安全的对称加密算法。因此，使用SoC技术的硬件实现有望提供比软件实现更好的性能。该芯片采用行业标准Verilog HDL设计，并在Altera Quartus II EDA环境中进行仿真。两个不同的对称密钥用于加密和解密明文。此外，还简化了混合列和替换字节函数，以尽量减少所建议设计的复杂性。实验研究表明，提出的AES加密处理器SoC在功耗方面优于现有的工作。
{"title":"Design of a Low Power Double AES Crypto-Processor SoC","authors":"Sihabul Islam, Md Liakot Ali, Rinath Ruhana","doi":"10.1109/ICTP53732.2021.9744235","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744235","url":null,"abstract":"System on a Chip (SoC) is the state of the art in VLSI design and automation today due to its impressive performance matrix in terms of power, speed, area, and design time. This paper presents the design of a SoC implementing the double AES crypto processor for better security than its single core. AES has been proved the most secured symmetric cryptographic algorithm certified by USA Govt. So, its hardware implementation using SoC technology is expected to offer much better performance than that of software implementation. The chip is designed using industry-standard Verilog HDL and simulated in Altera Quartus II EDA environment. Two different symmetric keys are used to encrypt and decrypt plaintext. Moreover, mixed columns, and substitution byte functions are simplified to minimize the complexity of the proposed design. The experimental study shows that the proposed AES crypto-processor SoC outperforms the existing works in terms of power requirement.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"283 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116400583","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}
Pub Date : 2021-12-22DOI: 10.1109/ICTP53732.2021.9744192
S. Farhad, A. Hoque, N. Tanvir, S. Islam, M. Hossain, Md. Zunaid Baten
In this work we report materials growth, optical characterization and finite-difference time domain (FDTD) based numerical analysis to study the enhancement and tuning of absorption characteristics of gold nanoparticle loaded ZnO nanorods grown by hydrothermal technique. Scanning electron microscopy imaging confirms that nearly vertically oriented, ordered array of ZnO nanorods can be grown on glass substrates if prior to hydrothermal growth, a seed layer of Al-doped ZnO (AZO) is deposited onto the substrate using drop-casting technique. Optical spectroscopy confirms absorption enhancement of the array with increasing size of gold-nanoparticles attached to the ZnO nanorods. Numerical results obtained from FDTD analysis of the three-dimensional photonic structure confirm that the reduced transmittance observed at ~550 nm is owing to the absorption enhancement caused by plasmonic resonance of the Au-nanoparticles. The simulation results also show that absorption characteristics of such arrays can be conveniently tuned from visible to near-infra-red wavelengths by controlling diameter and areal density of the nanorods. This study also suggests future scopes of research in this area regarding further enhancement and tuning of absorption characteristics of nanoparticle loaded ZnO nanorods grown on an AZO seeded substrate by hydrothermal technique.
{"title":"Enhanced and Tunable Absorption Characteristics of Au-nanoparticle Loaded ZnO Nanorods Grown by Hydrothermal Technique","authors":"S. Farhad, A. Hoque, N. Tanvir, S. Islam, M. Hossain, Md. Zunaid Baten","doi":"10.1109/ICTP53732.2021.9744192","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744192","url":null,"abstract":"In this work we report materials growth, optical characterization and finite-difference time domain (FDTD) based numerical analysis to study the enhancement and tuning of absorption characteristics of gold nanoparticle loaded ZnO nanorods grown by hydrothermal technique. Scanning electron microscopy imaging confirms that nearly vertically oriented, ordered array of ZnO nanorods can be grown on glass substrates if prior to hydrothermal growth, a seed layer of Al-doped ZnO (AZO) is deposited onto the substrate using drop-casting technique. Optical spectroscopy confirms absorption enhancement of the array with increasing size of gold-nanoparticles attached to the ZnO nanorods. Numerical results obtained from FDTD analysis of the three-dimensional photonic structure confirm that the reduced transmittance observed at ~550 nm is owing to the absorption enhancement caused by plasmonic resonance of the Au-nanoparticles. The simulation results also show that absorption characteristics of such arrays can be conveniently tuned from visible to near-infra-red wavelengths by controlling diameter and areal density of the nanorods. This study also suggests future scopes of research in this area regarding further enhancement and tuning of absorption characteristics of nanoparticle loaded ZnO nanorods grown on an AZO seeded substrate by hydrothermal technique.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123299659","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}
Pub Date : 2021-12-22DOI: 10.1109/ICTP53732.2021.9744182
Protik Bose Pranto, Bishal Basak Papan, M. S. Rahman
In a k-safe labeling of a graph G, each vertex is labeled by a distinct positive integer such that the difference of the labels of two adjacent vertices is at least k. The span of a k-safe labeling of G is the range between the minimum and the maximum labels used in G. The k-safe labeling problem asks to label all the vertices of G using the minimum span. This problem has practical applications in assigning frequencies of transmitters in a network. k-safe labeling problem has been proven to be NP-hard and there is not an exact upper bound on the span of k-safe labeling of a graph. In this paper, we give an upper bound on k-safe labelings of all connected graphs based on the size of the maximum clique in the graph. Our proof leads to a polynomial-time algorithm for finding a k-safe labeling of any connected graph attaining the bound.
{"title":"k-Safe Labelings of Connected Graphs","authors":"Protik Bose Pranto, Bishal Basak Papan, M. S. Rahman","doi":"10.1109/ICTP53732.2021.9744182","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744182","url":null,"abstract":"In a k-safe labeling of a graph G, each vertex is labeled by a distinct positive integer such that the difference of the labels of two adjacent vertices is at least k. The span of a k-safe labeling of G is the range between the minimum and the maximum labels used in G. The k-safe labeling problem asks to label all the vertices of G using the minimum span. This problem has practical applications in assigning frequencies of transmitters in a network. k-safe labeling problem has been proven to be NP-hard and there is not an exact upper bound on the span of k-safe labeling of a graph. In this paper, we give an upper bound on k-safe labelings of all connected graphs based on the size of the maximum clique in the graph. Our proof leads to a polynomial-time algorithm for finding a k-safe labeling of any connected graph attaining the bound.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123580121","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}
Pub Date : 2021-12-22DOI: 10.1109/ICTP53732.2021.9744155
Md. Samiur Rahman, M. Haque, Zubayer Kabir Eisham, M. T. Kawser, Mohammad Rubbyat Akram, Samin Z. Rahman
Throughout the revolving generations of cellular technologies, data security has been one of the biggest concerns. In an interference-limited wireless network, this security concern becomes quite vital due to the intervention of eavesdroppers in the network. As a result, the max-min secrecy throughput problem becomes one of the most significant optimization problems in the fields of wireless communication and network security. Nature-inspired optimization algorithms are quite vital tools for this kind of optimization problem. In this paper, a problem-specific adaptive version of the Grey Wolf Optimization Algorithm has been used to solve this max-min throughput problem, and the performance of the proposed algorithm has been compared with the existing methods and with a few existing meta-heuristic algorithms. The balance between the exploration and the exploitation phase has been controlled to enhance the convergence speed to yield the optimal solution in the lowest possible time.
{"title":"An Adaptive Grey Wolf Optimization Algorithm for Secrecy Rate Optimization in Interference Limited Wireless Networks","authors":"Md. Samiur Rahman, M. Haque, Zubayer Kabir Eisham, M. T. Kawser, Mohammad Rubbyat Akram, Samin Z. Rahman","doi":"10.1109/ICTP53732.2021.9744155","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744155","url":null,"abstract":"Throughout the revolving generations of cellular technologies, data security has been one of the biggest concerns. In an interference-limited wireless network, this security concern becomes quite vital due to the intervention of eavesdroppers in the network. As a result, the max-min secrecy throughput problem becomes one of the most significant optimization problems in the fields of wireless communication and network security. Nature-inspired optimization algorithms are quite vital tools for this kind of optimization problem. In this paper, a problem-specific adaptive version of the Grey Wolf Optimization Algorithm has been used to solve this max-min throughput problem, and the performance of the proposed algorithm has been compared with the existing methods and with a few existing meta-heuristic algorithms. The balance between the exploration and the exploitation phase has been controlled to enhance the convergence speed to yield the optimal solution in the lowest possible time.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124545261","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}
Pub Date : 2021-12-22DOI: 10.1109/ICTP53732.2021.9744206
Sydur Rahman, M. A. Islam, M. S. Alam
A metamaterial-based ultrathin absorber is proposed in this work using three layers of materials (Tungsten-Silica-Tungsten) for visible solar radiation absorption in which near-unity broadband absorbance is observed in a wavelength span of 380–765nm. The absorber is analyzed by the Finite Integration Technique. The average absorption is 96.86% in this visible domain and the peak is 99.96% at 497.65nm. The structure is investigated for various oblique incident angles and mechanical deformation for utilizing it in a complex solar energy harvester environment. It is found that the structure is wide-angle stable (up to 70°) and mechanically bendable without dropping a significant level of absorption.
{"title":"Design of a broadband metamaterial absorber for visible solar radiation entrapment","authors":"Sydur Rahman, M. A. Islam, M. S. Alam","doi":"10.1109/ICTP53732.2021.9744206","DOIUrl":"https://doi.org/10.1109/ICTP53732.2021.9744206","url":null,"abstract":"A metamaterial-based ultrathin absorber is proposed in this work using three layers of materials (Tungsten-Silica-Tungsten) for visible solar radiation absorption in which near-unity broadband absorbance is observed in a wavelength span of 380–765nm. The absorber is analyzed by the Finite Integration Technique. The average absorption is 96.86% in this visible domain and the peak is 99.96% at 497.65nm. The structure is investigated for various oblique incident angles and mechanical deformation for utilizing it in a complex solar energy harvester environment. It is found that the structure is wide-angle stable (up to 70°) and mechanically bendable without dropping a significant level of absorption.","PeriodicalId":328336,"journal":{"name":"2021 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"10 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132732818","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}
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