Optik最新文献_第2页

Microwave-assisted laser-induced breakdown spectroscopy on aluminum alloy for improved quantitation

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172182

M. Rashad Khan , S.U. Haq , Qamar Abbas , Riaz Khan , Ali Nadeem

{"title":"Microwave-assisted laser-induced breakdown spectroscopy on aluminum alloy for improved quantitation","authors":"M. Rashad Khan , S.U. Haq , Qamar Abbas , Riaz Khan , Ali Nadeem","doi":"10.1016/j.ijleo.2024.172182","DOIUrl":"10.1016/j.ijleo.2024.172182","url":null,"abstract":"<div><div>This study employed microwave-assisted laser-induced breakdown spectroscopy (MW-LIBS) to investigate the sensitivity and reproducibility of emission line intensity, plasma parameters, and analytical measurements. Standard Al-alloys (Xiamen Yichen Technology Co., China) were used due to its wide applications and excellent physical and mechanical properties. The plasmas of these alloys were produced using a fundamental harmonic (1064 nm) of Nd: YAG laser. The plasma emissions were recorded at laser energies (40–260 mJ) and microwave power 400, 800, and 1200 W. The MW setup consists of air-cooled 2.45 GHz microwave source (magnetron), a WR340 waveguide, a 3-stub impedance tuner, and a waveguide-to-coaxial adaptor. A one-meter coaxial cable with a sharpened end served as a near-field antenna. The experimental parameters, such as laser energy, microwave power, and detector gate delay, were optimized for sensitivity and repeatability. At an optimized laser energy of 140 mJ and a microwave peak power of 1200 W, signal enhancement was observed to increase six-fold, the signal-to-noise ratio (SNR) improved five-fold, and the limit of detection (LOD) decreased seven-fold compared to conventional LIBS. The repeatability in emission line intensity, measured in terms of relative standard deviation (RSD), was significantly improved from 36 % to 6 %, 46–18 %, and 27–13 % for Mg, Si, and Cu emission lines, respectively. The improvement in repeatability of emission line intensities led to improved accuracy in predicted concentration measurements based on calibration curves, with percentage deviations of 18–3 % for Mg and 35–11 % for Si.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"321 ","pages":"Article 172182"},"PeriodicalIF":3.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Achieving Pauli quantum logic gates with composite solitons of the Manakov system

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172173

U. Al Khawaja

引用次数: 0

Surface plasmon resonance sensor with 2D materials for enhanced refractive index detection of chemical pollutants in seawater

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172157

V. Nirmal Kannan , G. Prabhakar , N. Ayyanar

{"title":"Surface plasmon resonance sensor with 2D materials for enhanced refractive index detection of chemical pollutants in seawater","authors":"V. Nirmal Kannan , G. Prabhakar , N. Ayyanar","doi":"10.1016/j.ijleo.2024.172157","DOIUrl":"10.1016/j.ijleo.2024.172157","url":null,"abstract":"<div><div>This paper introduces a highly sensitive, graphene-based, multilayer surface plasmon resonance (SPR) refractive index sensor is designed for the detection of chemical pollutants in seawater. The sensor structure consists of multiple layers, specifically BK7 glass, Chromium (Cr), Copper (Cu), MXene, and Graphene. SPR sensors have gained significant attention in the field of real-time chemical sensing due to their label-free detection capabilities, high sensitivity, and excellent reproducibility. In this sensor design, the refractive index (RI) of the sensing region is altered by the interaction of chemical pollutants present in the seawater. These variations in RI directly affect the excitation of surface plasmon polaritons (SPPs) at the multilayer sensor interface. This interaction forms the basis for detecting chemical pollutants, as changes in RI modulate the sensor's optical response, which can be accurately measured. The performance of the proposed sensor is thoroughly evaluated using numerical simulations based on the Transfer Matrix Method (TMM). The simulations are carried out over a refractive index range of 1.329–1.433, covering the typical RI variations caused by chemical pollutants in seawater. The sensor demonstrated exceptional performance, achieving a maximum sensitivity of 186 deg/RIU at an operational wavelength of 633 nm. Additionally, the sensor is exhibited a high detection accuracy (DA) of 1.5 deg⁻¹ and a figure of merit (FOM) of 205 RIU⁻¹, highlighting its ability to precisely distinguish small changes in refractive index. These results emphasize the potential of this graphene-based SPR sensor configuration for high-performance detection of chemical pollutants, making it an excellent candidate for environmental monitoring applications. Its robust design, combined with its high sensitivity and accuracy, positions it as a promising solution for addressing challenges in seawater pollution detection and monitoring.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"321 ","pages":"Article 172157"},"PeriodicalIF":3.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

ns laser-Si interaction in air flow: The phenomena of surface etching and hetero-structuration

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172171

Nazim Aslam , Taj Muhammad Khan , M. Zakria , Shahab Ahmed Abbasi , Ishtiaq Ahmed

{"title":"ns laser-Si interaction in air flow: The phenomena of surface etching and hetero-structuration","authors":"Nazim Aslam , Taj Muhammad Khan , M. Zakria , Shahab Ahmed Abbasi , Ishtiaq Ahmed","doi":"10.1016/j.ijleo.2024.172171","DOIUrl":"10.1016/j.ijleo.2024.172171","url":null,"abstract":"<div><div>This paper investigates interaction of ns laser pulses with n-type Si under two irradiation conditions: ambient air and flowing air at 16 ms<sup>−1</sup>. This study was conducted using laser fluence of 1.5–2 J-cm<sup>−2</sup>, and laser shots number n (6 ≥ n ≥ 1) at focus and off-focus. Two different topographical phenomena were observed; in flowing air, at focus surface etching dominates, while ripple formation occurred in both conditions. Both of them were strongly dependent on the laser shots and irradiation condition at focus and off-focus. In air flow, at focus or off-focus, randomly distributed etched pits form, increasing in size and population with more laser pulses. Off-focus in air flow, formation of etched patches was reduced and regular ripples transitioned into broken ripples as the shot number increased. Contrary to this, in ambient air, no etching was seen, and persistent ripples were formed, showing localised topographical interruption and fractured features with increased shots. The broken features were more dominant for the increased laser shots due to the incubation impact and the hydrodynamic instabilities of molten silicon. Raman analysis revealed a striking difference in properties of textured Si under two conditions. The distinct topographical features in air flow and ambient air reflect altered melt dynamics and ripple formation driven by laser interaction. It shows a critical role of air flow in selectively altering the surface topography through etching, ripple formation or a combination of both.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"321 ","pages":"Article 172171"},"PeriodicalIF":3.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

The effect of quantum frequency conversion on the quantumness of radiation field states

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172172

R. Usefi, M.K. Tavassoly

引用次数: 0

Photoluminescence and thermally stimulated luminescence properties of Ba3Gd(PO4)3 single crystals doped with Dy

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172189

Haruaki Ezawa, Yuma Takebuchi, Takumi Kato, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida

{"title":"Photoluminescence and thermally stimulated luminescence properties of Ba3Gd(PO4)3 single crystals doped with Dy","authors":"Haruaki Ezawa, Yuma Takebuchi, Takumi Kato, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida","doi":"10.1016/j.ijleo.2024.172189","DOIUrl":"10.1016/j.ijleo.2024.172189","url":null,"abstract":"<div><div>The good optical and chemical properties of Ba<sub>3</sub>Gd(PO<sub>4</sub>)<sub>3</sub> (BGPO) make it an attractive option for use as an optical material. In this study, photoluminescence (PL) and thermally stimulated luminescence (TSL) properties of Dy-doped BGPO single crystals were investigated. The floating zone furnace was utilized to fabricate the bulk Dy-doped BGPO single crystals. Out of all the prepared Dy-doped BGPO single crystals, the 10 % Dy-doped sample exhibited the highest PL quantum yield value. All the prepared Dy-doped BGPO single crystals showed PL and TSL peaks at 310, 480, 580, 670, and 760 nm, resulting from 4f-4f transitions of Gd<sup>3+</sup> and Dy<sup>3+</sup>. The PL decay profiles had one component with a decay time constant of approximately 0.9 ms in all the prepared Dy-doped BGPO samples. The TSL glow peak of all the prepared Dy-doped BGPO samples located at 75 ℃. The 5 % Dy-doped BGPO sample displayed the highest TSL intensity with the lower detection limit of 0.01 mGy.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"321 ","pages":"Article 172189"},"PeriodicalIF":3.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Investigation of Nitrogen/Potassium deficiency in Alternanthera sessilis plant using deep learning model combined with CF-LIBS approach 利用深度学习模型结合 CF-LIBS 方法研究 Alternanthera sessilis 植物的氮/钾缺乏情况

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172183

Aiswarya J., Mariammal K., Sathiesh Kumar V., Veerappan K.

{"title":"Investigation of Nitrogen/Potassium deficiency in Alternanthera sessilis plant using deep learning model combined with CF-LIBS approach","authors":"Aiswarya J., Mariammal K., Sathiesh Kumar V., Veerappan K.","doi":"10.1016/j.ijleo.2024.172183","DOIUrl":"10.1016/j.ijleo.2024.172183","url":null,"abstract":"<div><div>In this paper, the investigation on Nitrogen (N)/Potassium (K) deficiency in Alternanthera sessilis plant is carried out by using a deep learning model combined with Calibration free – Laser induced breakdown spectroscopy (CF-LIBS) technique. The trained deep learning model considered is ResNet50 and DenseNet201. The models are trained and evaluated on a custom created dataset with three categories, namely Healthy, Nitrogen deficit, and Potassium deficit. A prediction accuracy of 92.10% and 98.89% is obtained using ResNet50 and DenseNet201 models, respectively. The obtained results are validated using the CF-LIBS technique. In LIBS, a high energy pulsed Nd:YAG laser (wavelength = 1064 nm, 532 nm and 355 nm) with a pulse duration and repetition rate of 6 ns and 10 Hz is used to create ablation and generate plasma. Laser irradiance varied between 1 × 10<sup>10</sup> W/cm<sup>2</sup> to 3 × 10<sup>10</sup> W/cm<sup>2</sup>. LIBS data is used to determine the nutrient content. After extensive experimental investigation, the estimated nutrient concentration for a healthy leaf sample is Ca = 6795 ± 645 ppm, N = 4284 ± 572 ppm and K = 14407 ± 609 ppm. The samples with Nitrogen (N = 1178 ± 541 ppm) and Potassium (K = 8989 ± 581 ppm) deficits show a reduction in respective concentrations. The determined Nitrogen (N)/Potassium (K) deficiency in Alternanthera sessilis plant using a deep learning model and CF-LIBS method are related to each other. The specified method can be used to perform in-situ analysis, rapid, remote measurement and multielement identification/ranking of plant materials.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"321 ","pages":"Article 172183"},"PeriodicalIF":3.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Analysis of beam wandering and influence of partial coherence on fourth-order moment of the light field in turbulent atmosphere 分析湍流大气中的光束漂移和部分相干性对光场四阶矩的影响

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172156

V. Andriichuk, L. Derzhypolska, I. Matsniev, O. Chumak

引用次数: 0

DualCompliCube reflector: A novel reflex reflector design for dual standard compliance and enhanced automotive safety

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172170

Hien-Thanh Le , Lanh-Thanh Le

{"title":"DualCompliCube reflector: A novel reflex reflector design for dual standard compliance and enhanced automotive safety","authors":"Hien-Thanh Le , Lanh-Thanh Le","doi":"10.1016/j.ijleo.2024.172170","DOIUrl":"10.1016/j.ijleo.2024.172170","url":null,"abstract":"<div><div>This paper performs a comparative analysis of the retro-reflective efficacy of two reflector designs: the DualCompliCube structure and the conventional structure, evaluated under both European Economic Commission for Europe (ECE) and the US Society of Automotive Engineers (SAE) standards across various incident angles. The findings demonstrate that the DualCompliCube structure consistently outperforms the conventional structure, achieving up to 70 % greater luminous intensity at a 0° incident angle and enhancements ranging from 69 % to 87 % at non-zero angles under the ECE standard. Even at broader angles, such as 20° Left and 20° Right, the DualCompliCube structure exhibits improvements of up to 83 %. The DualCompliCube structure's innovative design optimizes dihedral angles, enhances light distribution, and maintains superior visibility, yielding modest yet consistent improvements of up to 6 % higher Ri values compared to conventional structures. This study demonstrates that the DualCompliCube structure effectively meets the stringent demands of both ECE and SAE standards, thereby improving safety and visibility across various driving conditions.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"321 ","pages":"Article 172170"},"PeriodicalIF":3.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Interdiffusion induced changes in the absorption spectra of III-V quantum dot systems

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-02-01 DOI: 10.1016/j.ijleo.2024.172159

Subindu Kumar , Anjali Rai , Syed Sadique Anwer Askari

{"title":"Interdiffusion induced changes in the absorption spectra of III-V quantum dot systems","authors":"Subindu Kumar , Anjali Rai , Syed Sadique Anwer Askari","doi":"10.1016/j.ijleo.2024.172159","DOIUrl":"10.1016/j.ijleo.2024.172159","url":null,"abstract":"<div><div>III-V Semiconductor quantum dots (QDs) grown with growth interruption technique do not have uniform group III composition inside the dot. Modelling such as-grown structures requires in-depth knowledge of the composition and potential well profile. In this work, we have developed a three-dimensional analytical model which incorporates strain, as well as the variation of group III composition profile in both lateral and vertical directions inside an as-grown QD in order to quantify the effect of dot size variation on the interband optical absorption spectra of as-grown QD systems. Earlier reports on this subject considered the variation of either the dot height or base to account for the size deviation, which may not be sufficient enough to predict the dot size distribution in realistic systems, where all dimensions are likely to suffer from deviation. Keeping this in mind, Gaussian distribution of dot volume has been adopted here to consider the variations of height and base of QDs in a cumulative way. In our study, we considered InGaAs/GaAs and InGaN/GaN QD systems. The non-uniform distribution of indium inside the as-grown dot leads to a non-rectangular potential well profile, which eventually transforms into a rectangular one after annealing. Through the proposed model, we have investigated the effect of inhomogeneous indium composition and dot size variation on the optical absorption spectra of InGaAs/GaAs and InGaN/GaN as-grown QD systems through Gaussian distribution of dot volume. We have also discussed the effect of size deviation on the full width at half maxima (FWHM) of both as-grown and annealed QD systems. Emphasis has been given to the changes in the conduction and valence band potential profiles due to changes in the morphology inside the dot leading to subsequent changes in the energy levels caused by composition uniformity due to annealing and interdiffusion, thus modifying the nature of absorption spectra.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"321 ","pages":"Article 172159"},"PeriodicalIF":3.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0