Results in Optics最新文献_第2页

Phase dependence of non-classical photon number correlations in coupled optical processes 耦合光学过程中非经典光子数相关的相位依赖性

Results in Optics Pub Date : 2025-06-24 DOI: 10.1016/j.rio.2025.100859

Getnet Hagazi , Deribe Hirpo , Sintayehu Tesfa

{"title":"Phase dependence of non-classical photon number correlations in coupled optical processes","authors":"Getnet Hagazi , Deribe Hirpo , Sintayehu Tesfa","doi":"10.1016/j.rio.2025.100859","DOIUrl":"10.1016/j.rio.2025.100859","url":null,"abstract":"<div><div>In this paper, the authors investigate the coupling of the radiations generated by a non-degenerate three-level cascade laser and a parametric oscillator in a cavity coupled with a two-mode squeezed vacuum reservoir, using a <span><math><mrow><mn>50</mn><mo>:</mo><mn>50</mn></mrow></math></span> beam splitter. They analyze the quantum statistical properties of the light superposed via the standard beam splitter with phase shift <span><math><mi>ϕ</mi></math></span>. When the beams of light superpose in phase (<span><math><mrow><mi>ϕ</mi><mo>=</mo><mn>0</mn></mrow></math></span>) and operate above threshold, they demonstrate that the mean and variance of photon number increase initially and remain constant over time. They also show that these quantities significantly rise with the linear gain coefficient when more atoms are initially prepared in the top energy level, and, regardless of the initial atomic preparation, increase with the driving amplitude of the parametric oscillator. Furthermore, at steady state and above threshold, the authors reveal that the superposed radiation, despite exhibiting super-Poissonian statistics, displays non-classical photon number correlations due to strong cross-correlations between the cavity modes of the coupled systems.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100859"},"PeriodicalIF":0.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470747","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}

引用次数: 0

Image contrast restoration in total internal reflection fluorescence microscopy 全内反射荧光显微镜图像对比度恢复

Results in Optics Pub Date : 2025-06-24 DOI: 10.1016/j.rio.2025.100844

Samaneh Pahlevani, Batool Sajad, Sharareh Tavaddod

引用次数: 0

Innovative optical solitons and other exact wave solutions for coupled system of new nonlocal LPDE using improved modified extended tanh technique 采用改进的扩展tanh技术的新型非局域LPDE耦合系统的创新光孤子和其他精确波解

Results in Optics Pub Date : 2025-06-23 DOI: 10.1016/j.rio.2025.100853

Tarek A. Khalil , Hamdy M. Ahmed , Karim K. Ahmed , Homan Emadifar , Wafaa B. Rabie

引用次数: 0

Two-terminal tandem solar cells based on perovskite and transition metal dichalcogenides 基于钙钛矿和过渡金属二硫族化合物的双端串联太阳能电池

Results in Optics Pub Date : 2025-06-23 DOI: 10.1016/j.rio.2025.100854

Harishankar Suman, Avijit Kumar

{"title":"Two-terminal tandem solar cells based on perovskite and transition metal dichalcogenides","authors":"Harishankar Suman, Avijit Kumar","doi":"10.1016/j.rio.2025.100854","DOIUrl":"10.1016/j.rio.2025.100854","url":null,"abstract":"<div><div>Perovskite solar cells have shown power conversion efficiencies (PCE) comparable to crystalline silicon solar cell despite involving low-temperature, solution based synthesis processes outside clean room environment. As the theoretical PCE of a solar cell with band gap 1.34 eV is capped to 33 % due to Shockley–Queisser limit, tandem configurations are being investigated to go beyond this limit. Here, we propose a two-terminal (2T) tandem solar cell structure consisting of perovskite and multilayer transition metal dichalcogenides (TMDCs) as the absorber layers of the top and the bottom subcells, respectively and investigate their performance parameters using Solar Cell Capacitance Simulator- 1 Dimension (SCAPS-1D) software package. We demonstrate that the 2T tandem solar cell consisting of CH<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>NH<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>PbI<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> with band gap 1.55 eV and MoTe<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> with bandgap 1.1 eV shows optimum PCE of 35.3 % under AM 1.5 G illumination. This work gives a comprehensive understanding of modelling perovskite/TMDC based tandem solar cells. It also gives an experimental window for realization of such tandem solar cells for further investigation.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100854"},"PeriodicalIF":0.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480975","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}

引用次数: 0

Non-local quantum interference of deterministically separated photons 决定论分离光子的非局域量子干涉

Results in Optics Pub Date : 2025-06-23 DOI: 10.1016/j.rio.2025.100848

Kiran Bajar , Vikas S. Bhat , Rounak Chatterjee , Tabish Qureshi , Sushil Mujumdar

{"title":"Non-local quantum interference of deterministically separated photons","authors":"Kiran Bajar , Vikas S. Bhat , Rounak Chatterjee , Tabish Qureshi , Sushil Mujumdar","doi":"10.1016/j.rio.2025.100848","DOIUrl":"10.1016/j.rio.2025.100848","url":null,"abstract":"<div><div>Quantum entanglement enables a wide range of fundamental studies and practical applications in quantum optics, computing, and communication. In this work, we investigate two-photon interference using position-momentum entangled photons generated via Type-II Spontaneous Parametric Down-Conversion (SPDC). By employing a double-slit setup, we explore two distinct quantum interference phenomena: the Hanbury Brown and Twiss (HBT) effect, where the photons pass through different slits, and NOON-state interference, where both photons traverse the same slit. We deterministically separate the two photons based on their orthogonal polarizations and demonstrate that both interference effects persist despite their distinguishability at the detectors. This result goes beyond the conventional understanding of two-photon interference and reveals a novel nonlocal HBT effect, where interference occurs even in the absence of spatial overlap, and is rooted in entanglement. Our findings deepen the understanding of quantum interference and open new avenues for applications in quantum optics and precision measurement.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100848"},"PeriodicalIF":0.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517181","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}

引用次数: 0

Combination scattering and infrared absorption spectra of cyclohexane molecule 环己烷分子的联合散射和红外吸收光谱

Results in Optics Pub Date : 2025-06-13 DOI: 10.1016/j.rio.2025.100855

Shavkat Otajonov , Shakhlo Allaquliyeva , Husan Eshkuvatov , Nuraddin Abdullayev , Shohida Sodiqova , Dilfuza Begmatova

引用次数: 0

Dark soliton solutions of cubic-quartic non-linear Schrödinger equation via Sumudu HPM 三四次非线性Schrödinger方程的Sumudu HPM暗孤子解

Results in Optics Pub Date : 2025-06-13 DOI: 10.1016/j.rio.2025.100857

Mamta Kapoor

{"title":"Dark soliton solutions of cubic-quartic non-linear Schrödinger equation via Sumudu HPM","authors":"Mamta Kapoor","doi":"10.1016/j.rio.2025.100857","DOIUrl":"10.1016/j.rio.2025.100857","url":null,"abstract":"<div><div>This research provides study about the cubic-quartic nonlinear Schrödinger equation (CQNLSE), a basic mathematical model with applications in nonlinear optics, plasma physics, and Bose-Einstein condensates. Accurate solutions to such equations are important to understand the behavior of nonlinear waves, including formation of dark solitons. Traditional numerical methods contain discretization and linearization errors, which limits their accuracy and efficiency. To overcome such challenges, a novel hybrid semi-analytical method is proposed in this study, named as Sumudu-HPM, which combines the Sumudu transform with the homotopy perturbation method (HPM). The Sumudu transform simplifies tackling of initial conditions and converts governing equation into an algebraic form, while HPM generates a recursive approximation to the solution. This hybrid approach preserves the nonlinearity of the system without discretization or linearization. The fetched semi-analytical dark soliton solutions claim excellent agreement with exact solutions across a wide range of time levels, demonstrating accuracy, efficiency, and robustness of proposed method.</div><div>The key novelty of this work is in the application of Sumudu-HPM approach to solve cubic-quartic nonlinear Schrödinger equation, which bridges the gap between transform-based techniques and perturbation methods for complex nonlinear wave models. The proposed method provides a computationally efficient, stable, and accurate prototype to tackle highly nonlinear partial differential equations, which makes it a valuable tool for researchers across nonlinear science, engineering, and applied mathematics. The main novelty of this work is to develop and implement an efficient semi-analytical technique which is free from discretization error and is computationally efficient.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100857"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298690","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}

引用次数: 0

Semi analytical technique implementation upon 4th-order Schrödinger equations with cubic–quintic nonlinearity 具有三次五次非线性的四阶Schrödinger方程的半解析技术实现

Results in Optics Pub Date : 2025-06-09 DOI: 10.1016/j.rio.2025.100846

Mamta Kapoor

{"title":"Semi analytical technique implementation upon 4th-order Schrödinger equations with cubic–quintic nonlinearity","authors":"Mamta Kapoor","doi":"10.1016/j.rio.2025.100846","DOIUrl":"10.1016/j.rio.2025.100846","url":null,"abstract":"<div><div>Higher-order nonlinear Schrödinger equations are frequently analyzed as a result of research into nonlinear wave mechanics in intricate physical systems. In this work, the <span><math><mrow><msup><mn>4</mn><mrow><mi>th</mi></mrow></msup></mrow></math></span>-order Schrödinger equation with cubic-quintic nonlinearity is solved using semi-analytical method named Shehu HPM. Higher-order dispersive effects are considered by <span><math><mrow><msup><mn>4</mn><mrow><mi>th</mi></mrow></msup></mrow></math></span>-order components, and equilibrium between self-focusing and saturation events in nonlinear media is modeled by the cubic–quintic nonlinearity. The intricate interaction of higher-order components with nonlinearity is frequently too complex for traditional numerical methods to handle, requiring reliable and precise semi-analytical techniques. The fetched results demonstrate exceptional agreement between exact and approximated solutions, validated through rigorous graphical compatibility analysis. The success of this approach underscores its effectiveness in handling higher-order dispersive and nonlinear terms, offering a reliable alternative to purely numerical techniques.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100846"},"PeriodicalIF":0.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271612","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}

引用次数: 0

Power optimization of 1:2 and 1:4 photonic crystal based optical power splitters/combiners using machine learning algorithms 基于机器学习算法的1:2和1:4光子晶体光功率分配器/合成器的功率优化

Results in Optics Pub Date : 2025-06-09 DOI: 10.1016/j.rio.2025.100858

Kalyan Kumar Ghosh , Haraprasad Mondal , Himanshu Ranjan Das , Mohammad Soroosh , Sudipta Majumder , Bhargabjyoti Saikia

{"title":"Power optimization of 1:2 and 1:4 photonic crystal based optical power splitters/combiners using machine learning algorithms","authors":"Kalyan Kumar Ghosh , Haraprasad Mondal , Himanshu Ranjan Das , Mohammad Soroosh , Sudipta Majumder , Bhargabjyoti Saikia","doi":"10.1016/j.rio.2025.100858","DOIUrl":"10.1016/j.rio.2025.100858","url":null,"abstract":"<div><div>Optical power splitters play a vital role in signal distribution, network expansion, and both balanced and unbalanced power splitting in cost-efficient fiber optic systems. Similarly, optical power combiners are essential for signal aggregation, upstream transmission, and balanced network design. In this article, we propose the design of two power splitters—3 dB and 6 dB Y-shaped configurations—that also function as power combiners using two-dimensional photonic crystal waveguides. The performance of these devices has been analyzed using the finite difference time domain (FDTD) algorithm, and their operational parameters have been optimized through the K-means clustering and Particle Swarm Optimization algorithms. As a result of this optimization, the devices achieve precise 3 dB and 6 dB power splitting across all output ports with an efficiency of 99 %. Their fast response time (0.4 and 0.5 picoseconds for 3 dB and 6 dB respectively), high power delivery efficiency, precise power splitting/combining capabilities, and Machine Learming (ML) – driven optimization make these splitters/combiners highly suitable for advanced fiber optic networks.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100858"},"PeriodicalIF":0.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255183","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}

引用次数: 0

Molybdenum-doped TiO2 nanoparticles for enhanced photocatalytic activity: a combined experimental and theoretical study 钼掺杂TiO2纳米颗粒增强光催化活性的实验与理论结合研究

Results in Optics Pub Date : 2025-06-09 DOI: 10.1016/j.rio.2025.100850

Hamid Khan , Matiullah Khan , Yaseen Iqbal , Yi Zeng

引用次数: 0