Pub Date : 2022-03-15DOI: 10.1088/2515-7639/ac5dcd
D. Mastrippolito, Jing Wang, G. Profeta, L. Ottaviano
Among chromium trihalides, a specific group of layered van der Waals magnetic materials, chromium trichloride (CrCl3) is the only system relatively stable under ambient conditions. This is also observed in reduced dimensionality where the emergence of extrinsic long-range ordered oxidized and Cl-vacancy-defective CrCl3 phases is experimentally reported. In this work, the magnetic properties of such extrinsic two-dimensional (2D) systems are studied using density functional theory (DFT) calculations, including the electron-electron (U) repulsion interactions, and Monte Carlo (MC) simulations. Once the Cl vacancies are introduced, the results indicate that the monolayer CrCl3 has a magnetic moment that is enhanced linearly (up to 3.14 μB/Cr) in the (1-10 %) vacancy concentration range. This determines a strengthening of the ferromagnetic state and a two-fold increase of the Curie temperature (up to 146 K) as valuated from MC simulations. More interestingly, once oxygen extrinsic impurities are considered, the monolayer CrCl3 structure is hybridized forming a stable ordered phase (O-CrCl3) with oxygen atoms allocated on the Cr atomic layer in the center of the honeycomb ring formed by Cr atoms. The magnetic moments of the O-CrCl3 system are localized on both Cr and O atoms, with oxygen which is antiferromagnetically coupled with chromium, resulting in a 2D ferrimagnetic hexagonal lattice system with an average magnetic moment of 2.14 μB/Cr and a high magnetic ordering temperature (110 K) predicted with DFT in the mean field approach.
{"title":"Unconventional ferrimagnetism and enhanced magnetic ordering temperature in monolayer CrCl3 by introducing O impurities and Cl vacancies","authors":"D. Mastrippolito, Jing Wang, G. Profeta, L. Ottaviano","doi":"10.1088/2515-7639/ac5dcd","DOIUrl":"https://doi.org/10.1088/2515-7639/ac5dcd","url":null,"abstract":"\u0000 Among chromium trihalides, a specific group of layered van der Waals magnetic materials, chromium trichloride (CrCl3) is the only system relatively stable under ambient conditions. This is also observed in reduced dimensionality where the emergence of extrinsic long-range ordered oxidized and Cl-vacancy-defective CrCl3 phases is experimentally reported. In this work, the magnetic properties of such extrinsic two-dimensional (2D) systems are studied using density functional theory (DFT) calculations, including the electron-electron (U) repulsion interactions, and Monte Carlo (MC) simulations. Once the Cl vacancies are introduced, the results indicate that the monolayer CrCl3 has a magnetic moment that is enhanced linearly (up to 3.14 μB/Cr) in the (1-10 %) vacancy concentration range. This determines a strengthening of the ferromagnetic state and a two-fold increase of the Curie temperature (up to 146 K) as valuated from MC simulations. More interestingly, once oxygen extrinsic impurities are considered, the monolayer CrCl3 structure is hybridized forming a stable ordered phase (O-CrCl3) with oxygen atoms allocated on the Cr atomic layer in the center of the honeycomb ring formed by Cr atoms. The magnetic moments of the O-CrCl3 system are localized on both Cr and O atoms, with oxygen which is antiferromagnetically coupled with chromium, resulting in a 2D ferrimagnetic hexagonal lattice system with an average magnetic moment of 2.14 μB/Cr and a high magnetic ordering temperature (110 K) predicted with DFT in the mean field approach.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"519 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76432250","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}
Pub Date : 2022-02-28DOI: 10.1088/2515-7639/ac5914
Wenwen Li, Pu Chen, Bo Xiong, Guandong Liu, Shuliang Dou, Yaohui Zhan, Zhiyuan Zhu, Tao Chu, Yao Li, Wei Ma
Computational modeling is a crucial approach in material-related research for discovering new materials with superior properties. However, the high design flexibility in materials, especially in the realm of metamaterials where the sub-wavelength structure provides an additional degree of freedom in design, poses a formidable computational cost in various real-world applications. With the advent of big data, deep learning (DL) brings revolutionary breakthroughs in many conventional machine learning and pattern recognition tasks such as image classification. The accompanied data-driven modeling paradigm also provides transformative methodology shift in materials science, from trial-and-error routine to intelligent material discovery and analysis. This review systematically summarize the application of DL in material science, based on a model selection perspective for both natural materials and metamaterials. The review aims to uncover the logic behind data-model relation with emphasis on suitable data structures for different scenarios in the material study and the corresponding problem-solving DL model architectures.
{"title":"Deep learning modeling strategy for material science: from natural materials to metamaterials","authors":"Wenwen Li, Pu Chen, Bo Xiong, Guandong Liu, Shuliang Dou, Yaohui Zhan, Zhiyuan Zhu, Tao Chu, Yao Li, Wei Ma","doi":"10.1088/2515-7639/ac5914","DOIUrl":"https://doi.org/10.1088/2515-7639/ac5914","url":null,"abstract":"Computational modeling is a crucial approach in material-related research for discovering new materials with superior properties. However, the high design flexibility in materials, especially in the realm of metamaterials where the sub-wavelength structure provides an additional degree of freedom in design, poses a formidable computational cost in various real-world applications. With the advent of big data, deep learning (DL) brings revolutionary breakthroughs in many conventional machine learning and pattern recognition tasks such as image classification. The accompanied data-driven modeling paradigm also provides transformative methodology shift in materials science, from trial-and-error routine to intelligent material discovery and analysis. This review systematically summarize the application of DL in material science, based on a model selection perspective for both natural materials and metamaterials. The review aims to uncover the logic behind data-model relation with emphasis on suitable data structures for different scenarios in the material study and the corresponding problem-solving DL model architectures.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"4 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86213038","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}
Pub Date : 2022-02-28DOI: 10.1088/2515-7639/ac84ad
Nils Wittemeier, Pablo Ordej'on, Z. Zanolli
Some metastable polymorphs of bismuth monolayers (bismuthene) can host non-trivial topological phases. However, it remains unclear whether these polymorphs can become stable through interaction with a substrate, whether their topological properties are preserved, and how to design an optimal substrate to make the topological phase more robust. Using first-principles techniques, we demonstrate that bismuthene polymorphs can become stable over silicon carbide (SiC), silicon (Si), and silicon dioxide (SiO2) and that proximity interaction in these heterostructures has a significant effect on the electronic structure of the monolayer, even when bonding is weak. We show that van der Waals interactions and the breaking of the sublattice symmetry are the main factors driving changes in the electronic structure in non-covalently binding heterostructures. Our work demonstrates that substrate interaction can strengthen the topological properties of bismuthene polymorphs and make them accessible for experimental investigations and technological applications.
{"title":"Tuning the topological band gap of bismuthene with silicon-based substrates","authors":"Nils Wittemeier, Pablo Ordej'on, Z. Zanolli","doi":"10.1088/2515-7639/ac84ad","DOIUrl":"https://doi.org/10.1088/2515-7639/ac84ad","url":null,"abstract":"Some metastable polymorphs of bismuth monolayers (bismuthene) can host non-trivial topological phases. However, it remains unclear whether these polymorphs can become stable through interaction with a substrate, whether their topological properties are preserved, and how to design an optimal substrate to make the topological phase more robust. Using first-principles techniques, we demonstrate that bismuthene polymorphs can become stable over silicon carbide (SiC), silicon (Si), and silicon dioxide (SiO2) and that proximity interaction in these heterostructures has a significant effect on the electronic structure of the monolayer, even when bonding is weak. We show that van der Waals interactions and the breaking of the sublattice symmetry are the main factors driving changes in the electronic structure in non-covalently binding heterostructures. Our work demonstrates that substrate interaction can strengthen the topological properties of bismuthene polymorphs and make them accessible for experimental investigations and technological applications.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"32 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89962655","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}
Pub Date : 2022-02-18DOI: 10.1142/s0218863522500175
S. Chalimah, Yuanzhao Yao, N. Ikeda, Afshan Begum, K. Kaneko, R. Hashimoto, T. Kakuno, S. Saito, T. Kuroda, Y. Sugimoto, K. Sakoda
We study the angle-dependent reflection spectra of two-dimensional photonic crystal (PC) slabs, which we use for developing mid-infrared surface-emitting lasers. The PC design produces a perfect resonance between material gain frequencies and the [Formula: see text]-point band edge in the first Brillouin zone. Hence, we expect laser emission to occur in a direction normal to the slab surface. We fabricate PC slabs, which consist of a square lattice of nanopillars with different lateral cross-sections, i.e., circles, triangles, and pentagons, and discuss their impact on the mode characteristics. We consider that our angle-resolved spectroscopic technique will be useful for characterizing mid-infrared PC slabs to be used in vertical surface-emitting quantum cascade lasers.
{"title":"Mid-infrared angle-resolved spectral characteristics of photonic crystal slabs for application in surface-emitting quantum cascade lasers","authors":"S. Chalimah, Yuanzhao Yao, N. Ikeda, Afshan Begum, K. Kaneko, R. Hashimoto, T. Kakuno, S. Saito, T. Kuroda, Y. Sugimoto, K. Sakoda","doi":"10.1142/s0218863522500175","DOIUrl":"https://doi.org/10.1142/s0218863522500175","url":null,"abstract":"We study the angle-dependent reflection spectra of two-dimensional photonic crystal (PC) slabs, which we use for developing mid-infrared surface-emitting lasers. The PC design produces a perfect resonance between material gain frequencies and the [Formula: see text]-point band edge in the first Brillouin zone. Hence, we expect laser emission to occur in a direction normal to the slab surface. We fabricate PC slabs, which consist of a square lattice of nanopillars with different lateral cross-sections, i.e., circles, triangles, and pentagons, and discuss their impact on the mode characteristics. We consider that our angle-resolved spectroscopic technique will be useful for characterizing mid-infrared PC slabs to be used in vertical surface-emitting quantum cascade lasers.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"89 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75903800","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}
Pub Date : 2022-02-17DOI: 10.1142/s0218863522500151
M. Zidan, M. Al-Ktaifani, M. S. El-daher, A. Allahham, A. Ghanem
The new prepared hybrid salt 1,1’-(Ethylene-1,2-diyl)dipyridinium pentacyanidonitrosoferrate(II) pentahydrate was synthesized. Then, it was characterized using different spectroscopic methods. The nonlinear optical properties of the new compound were investigated using the simple [Formula: see text]-scan technique with a CW diode laser radiation ([Formula: see text][Formula: see text]nm). Also, the [Formula: see text]-scan technique with pump/probe configuration was utilized to observe the Cross Phase Modulation (XPM) phenomena. Theoretical fit to the new experimental data was performed to calculate the third order nonlinear optical parameters including the nonlinear refractive index, which is about [Formula: see text][Formula: see text]cm2/W. This kind of molecule is considered to be promising candidate for using in future optoelectronic devices.
{"title":"Synthesis and nonlinear optical study of the hybrid salt: [C12H14N2][Fe(CN)5(NO)]⋅5H2O","authors":"M. Zidan, M. Al-Ktaifani, M. S. El-daher, A. Allahham, A. Ghanem","doi":"10.1142/s0218863522500151","DOIUrl":"https://doi.org/10.1142/s0218863522500151","url":null,"abstract":"The new prepared hybrid salt 1,1’-(Ethylene-1,2-diyl)dipyridinium pentacyanidonitrosoferrate(II) pentahydrate was synthesized. Then, it was characterized using different spectroscopic methods. The nonlinear optical properties of the new compound were investigated using the simple [Formula: see text]-scan technique with a CW diode laser radiation ([Formula: see text][Formula: see text]nm). Also, the [Formula: see text]-scan technique with pump/probe configuration was utilized to observe the Cross Phase Modulation (XPM) phenomena. Theoretical fit to the new experimental data was performed to calculate the third order nonlinear optical parameters including the nonlinear refractive index, which is about [Formula: see text][Formula: see text]cm2/W. This kind of molecule is considered to be promising candidate for using in future optoelectronic devices.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"19 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74816695","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}
Pub Date : 2022-02-11DOI: 10.1142/s0218863522500102
Nastaran Shamsodini, G. Honarasa
In this paper, the properties of four-petal Lorentz–Gaussian beams (FPLGBs) during propagation in the strongly nonlinear nonlocal media (SNNM) are investigated by using the Collins formula. The impact of the beam and media parameters on the propagation of an FPLGB is investigated analytically. The intensity distribution of an FPLGB during propagation in the SNNM evolves periodically and the initial beam profile with four beamlets disappears for enormous values of the input power.
{"title":"Evolution of four-petal Lorentz–Gauss beams in the strongly nonlocal nonlinear media","authors":"Nastaran Shamsodini, G. Honarasa","doi":"10.1142/s0218863522500102","DOIUrl":"https://doi.org/10.1142/s0218863522500102","url":null,"abstract":"In this paper, the properties of four-petal Lorentz–Gaussian beams (FPLGBs) during propagation in the strongly nonlinear nonlocal media (SNNM) are investigated by using the Collins formula. The impact of the beam and media parameters on the propagation of an FPLGB is investigated analytically. The intensity distribution of an FPLGB during propagation in the SNNM evolves periodically and the initial beam profile with four beamlets disappears for enormous values of the input power.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"11 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73881212","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}
Pub Date : 2022-02-04DOI: 10.1142/s0218863522500126
Imran Ahmad Salmani, Tahir Murtaza, Mohd. Saleem Khan, M. Khan
Third-order nonlinear optical property of multiferroic bismuth ferrite (BiFeO3) nanoparticles sintered at different temperatures has been studied by employing Z-Scan technique. BiFeO3 (BFO) nanoparticles (NPs) were synthesized by the sol–gel process with different sintering temperature of 823[Formula: see text]K, 923[Formula: see text]K and 1023[Formula: see text]K. XRD reveals that all samples have single-phase rhombohedral structure with R3c space group with no secondary phases present. The calculated crystallite size for samples sintered at 823[Formula: see text]K, 923[Formula: see text]K and 1023[Formula: see text]K is found to be 75[Formula: see text]nm, 87[Formula: see text]nm and 94[Formula: see text]nm, respectively. Crystal structure parameters and phase analysis of the BFO samples are obtained by the Rietveld refinement (FullProf) method. FTIR spectra show the absorbance peaks at 448[Formula: see text]cm[Formula: see text] and 533[Formula: see text]cm[Formula: see text] which confirm the synthesis of NPs. SEM images show the agglomerated spherical particles. Average crystallite and particle size of the samples are found to increase by increasing the sintering temperature. EDX verifies the constituent elements and reveals that stoichiometry in sample preparation is well-matched with the atomic ratio of the experimental quantity. The nonlinear absorption coefficient is characterized by the Z-Scan method employing continuous wave (CW) laser operating at 532[Formula: see text]nm wavelength. Nonlinear absorption coefficient ([Formula: see text]), evaluated by open aperture Z-scan data, is found to decrease with an increase in the particle size of the BFO NPs. BFO nanoparticles synthesized by optimizing the synthesis temperature can be used for the various applications of futuristic multiferroic and optical devices.
{"title":"Analysis of size-dependent variation in nonlinear absorption coefficient of multiferroic bismuth ferrite nanoparticles synthesized at different sintering temperature","authors":"Imran Ahmad Salmani, Tahir Murtaza, Mohd. Saleem Khan, M. Khan","doi":"10.1142/s0218863522500126","DOIUrl":"https://doi.org/10.1142/s0218863522500126","url":null,"abstract":"Third-order nonlinear optical property of multiferroic bismuth ferrite (BiFeO3) nanoparticles sintered at different temperatures has been studied by employing Z-Scan technique. BiFeO3 (BFO) nanoparticles (NPs) were synthesized by the sol–gel process with different sintering temperature of 823[Formula: see text]K, 923[Formula: see text]K and 1023[Formula: see text]K. XRD reveals that all samples have single-phase rhombohedral structure with R3c space group with no secondary phases present. The calculated crystallite size for samples sintered at 823[Formula: see text]K, 923[Formula: see text]K and 1023[Formula: see text]K is found to be 75[Formula: see text]nm, 87[Formula: see text]nm and 94[Formula: see text]nm, respectively. Crystal structure parameters and phase analysis of the BFO samples are obtained by the Rietveld refinement (FullProf) method. FTIR spectra show the absorbance peaks at 448[Formula: see text]cm[Formula: see text] and 533[Formula: see text]cm[Formula: see text] which confirm the synthesis of NPs. SEM images show the agglomerated spherical particles. Average crystallite and particle size of the samples are found to increase by increasing the sintering temperature. EDX verifies the constituent elements and reveals that stoichiometry in sample preparation is well-matched with the atomic ratio of the experimental quantity. The nonlinear absorption coefficient is characterized by the Z-Scan method employing continuous wave (CW) laser operating at 532[Formula: see text]nm wavelength. Nonlinear absorption coefficient ([Formula: see text]), evaluated by open aperture Z-scan data, is found to decrease with an increase in the particle size of the BFO NPs. BFO nanoparticles synthesized by optimizing the synthesis temperature can be used for the various applications of futuristic multiferroic and optical devices.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"9 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78424254","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}
Pub Date : 2022-01-31DOI: 10.1142/s021886352250014x
N. Raza, M. Rafiq, A. Bekir, H. Rezazadeh
The aim of this work is to find some intriguing optical soliton solutions in ([Formula: see text]) dimensions. These soliton solutions including rational, dark, periodic, and elliptic solitons are discovered using the unified technique and the fractional order Local M-derivative to address the temporal fractional Kundu–Mukherjee–Naskar equation. It is the modification of familiar Nonlinear Schrödinger equation and used to describe the bending of an optical solitonic beam in the domain of nonlinear fiber optics and communication system. The obtained solutions are suggested with relevant conditions for their existence and displayed against 3D graphics. Also, to observe and identify the effect of fractional-order parameter on constructed solutions is shown through 2D graphs. The findings highlight that the suggested approach is simple, efficient and successful in determining the exact solution of models in optics, engineering, and other nonlinear sciences.
{"title":"Optical solitons related to (2+1)-dimensional Kundu–Mukherjee–Naskar model using an innovative integration architecture","authors":"N. Raza, M. Rafiq, A. Bekir, H. Rezazadeh","doi":"10.1142/s021886352250014x","DOIUrl":"https://doi.org/10.1142/s021886352250014x","url":null,"abstract":"The aim of this work is to find some intriguing optical soliton solutions in ([Formula: see text]) dimensions. These soliton solutions including rational, dark, periodic, and elliptic solitons are discovered using the unified technique and the fractional order Local M-derivative to address the temporal fractional Kundu–Mukherjee–Naskar equation. It is the modification of familiar Nonlinear Schrödinger equation and used to describe the bending of an optical solitonic beam in the domain of nonlinear fiber optics and communication system. The obtained solutions are suggested with relevant conditions for their existence and displayed against 3D graphics. Also, to observe and identify the effect of fractional-order parameter on constructed solutions is shown through 2D graphs. The findings highlight that the suggested approach is simple, efficient and successful in determining the exact solution of models in optics, engineering, and other nonlinear sciences.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"21 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75023329","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}
Pub Date : 2022-01-28DOI: 10.1142/s0218863522500138
Khosro Heydarian, A. Nosratpour, M. Razaghi
In the presented structure, the performance of the all-optical XOR logic gate (AO-XOR-LG) is investigated. The XOR-LG is designed and simulated using a photonic crystal semiconductor optical amplifier (PC-SOA) based on Mach–Zehnder interferometer (MZI) and cross-phase modulation (XPM) nonlinear mechanism. The input optical pulse train used in this simulation is the type of RZ (Return-to-Zero). The finite difference method (FDM) has been used to solve the rate and propagation equations. The effect of input signal energy, bias current, and group refractive index on the output signal and gain of the XOR-LG is studied. The optimal mode is obtained for the XOR-LG with a bit rate of 80 Gbps. Furthermore, for the first time, the effects of quality factor (QF), conversion efficiency (CE), extinction ratio (ER), pattern effect (PE), and gain recovery are simultaneously analyzed in the simulation to increase PC-SOA performance. According to the results, PC-SOA has a more reasonable logic performance than conventional SOA, and due to its much shorter length than SOA, it can be a much better choice for integrated optical circuits.
{"title":"Design and simulation of the all-optical XOR logic gate by XPM mechanism using photonic crystal semiconductor optical amplifier based on mach–zehnder interferometer","authors":"Khosro Heydarian, A. Nosratpour, M. Razaghi","doi":"10.1142/s0218863522500138","DOIUrl":"https://doi.org/10.1142/s0218863522500138","url":null,"abstract":"In the presented structure, the performance of the all-optical XOR logic gate (AO-XOR-LG) is investigated. The XOR-LG is designed and simulated using a photonic crystal semiconductor optical amplifier (PC-SOA) based on Mach–Zehnder interferometer (MZI) and cross-phase modulation (XPM) nonlinear mechanism. The input optical pulse train used in this simulation is the type of RZ (Return-to-Zero). The finite difference method (FDM) has been used to solve the rate and propagation equations. The effect of input signal energy, bias current, and group refractive index on the output signal and gain of the XOR-LG is studied. The optimal mode is obtained for the XOR-LG with a bit rate of 80 Gbps. Furthermore, for the first time, the effects of quality factor (QF), conversion efficiency (CE), extinction ratio (ER), pattern effect (PE), and gain recovery are simultaneously analyzed in the simulation to increase PC-SOA performance. According to the results, PC-SOA has a more reasonable logic performance than conventional SOA, and due to its much shorter length than SOA, it can be a much better choice for integrated optical circuits.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"33 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74696480","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}
Pub Date : 2022-01-27DOI: 10.1088/2515-7639/ac4fa5
A. Liu, D. Almeida, L. Padilha, S. Cundiff
Recently, colloidal perovskite nanocrystals (PNCs) have emerged as an exciting material platformfor optoelectronic applications due to their combination of facile synthesis routes, quantum size effects, and exceptional optical properties among other favorable characteristics. Given the focus on their optoelectronic properties, spectroscopic characterization of PNCs is crucial to rational design of their structure and device implementation. In this Perspective, we discuss how multi-dimensional coherent spectroscopy (MDCS) can resolve exciton dynamics and circumvent inhomogeneous broadening to reveal underlying homogeneous spectral lineshapes. We highlight recent applications of MDCS to PNCs in the literature, and suggest compelling problems concerning their microscopic physics to be addressed by MDCS in the future.
{"title":"Perspective: Multi-Dimensional Coherent Spectroscopy of Perovskite Nanocrystals","authors":"A. Liu, D. Almeida, L. Padilha, S. Cundiff","doi":"10.1088/2515-7639/ac4fa5","DOIUrl":"https://doi.org/10.1088/2515-7639/ac4fa5","url":null,"abstract":"\u0000 Recently, colloidal perovskite nanocrystals (PNCs) have emerged as an exciting material platformfor optoelectronic applications due to their combination of facile synthesis routes, quantum size effects, and exceptional optical properties among other favorable characteristics. Given the focus on their optoelectronic properties, spectroscopic characterization of PNCs is crucial to rational design of their structure and device implementation. In this Perspective, we discuss how multi-dimensional coherent spectroscopy (MDCS) can resolve exciton dynamics and circumvent inhomogeneous broadening to reveal underlying homogeneous spectral lineshapes. We highlight recent applications of MDCS to PNCs in the literature, and suggest compelling problems concerning their microscopic physics to be addressed by MDCS in the future.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"23 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82037087","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}
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