Journal of the Korean Physical Society最新文献_第2页

Investigation of fundamental photonic devices and effect of post-cleaning using potassium hydroxide on lithium niobate chip 基本光子器件的研究及氢氧化钾对铌酸锂芯片后清洗的影响

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-12-11 DOI: 10.1007/s40042-024-01250-0

Kiwon Kwon, Heedeuk Shin, Hyeong-soon Jang, Hyungjun Heo, Hojoong Jung

引用次数: 0

Fe-doped buffer layer with graded layered AlGaN/GaN HEMT for millimeter-wave radar applications 具有渐变层状AlGaN/GaN HEMT的掺铁缓冲层用于毫米波雷达

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-12-06 DOI: 10.1007/s40042-024-01249-7

A. Akshaykranth, J. Ajayan, Sandip Bhattacharya

{"title":"Fe-doped buffer layer with graded layered AlGaN/GaN HEMT for millimeter-wave radar applications","authors":"A. Akshaykranth, J. Ajayan, Sandip Bhattacharya","doi":"10.1007/s40042-024-01249-7","DOIUrl":"10.1007/s40042-024-01249-7","url":null,"abstract":"<div>The low cost and scalability of silicon substrates have led to increasing attention to AlGaN/GaN high-electron-mobility transistors (HEMTs) on silicon wafer. We developed and simulated the GaN-based HEMT on Si wafer using the Silvaco TCAD software. The performance of rectangular-gate AlGaN/GaN HEMT on Si wafer is examined in detail with respect to the effects of channel length variation, barrier thickness variation, and gate length variation. The performance of this HEMT structure with a gate length of 100 nm and optimized channel layer thickness (CT) of 200 nm has shown a significant IDS of 1.11 A/mm, a substantial Gm of 329.79 mS/mm, an impressive fT of 199.40 GHz, and a notable output current of 1.71 A/mm. When the barrier layer thickness (BT) was varied from 6 to 10 nm while maintaining a 200 nm channel layer thickness, the performance declined at higher barrier thicknesses, yielding an IDS of 0.8 A/mm, a Gm of 206 mS/mm, an fT of 193.2 GHz, and an output current of 1.26 A/mm. Finally, this HEMT structure demonstrated superior performance with a gate length (LG) of 40 nm, exhibiting a drain current of 1.92 A/mm, a transconductance (Gm) of 465.49 mS/mm, and a cut-off frequency (fT) of 465 GHz, and output current (ID) of 2.11 A/mm. The optimized device structure’s high-power performance without compromising RF performance, they are suitable for millimeter-wave radar applications.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 2","pages":"120 - 125"},"PeriodicalIF":0.8,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994689","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}

引用次数: 0

Erratum: Existence of symmetry-broken excited states in single and ensemble quantum ring structures 勘误：单量子环和系综量子环结构中对称破缺激发态的存在性

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-12-06 DOI: 10.1007/s40042-024-01247-9

Hyoseong Jang, Seung Kwon Jeon, Seungmin Jeong, Heedae Kim

引用次数: 0

smCamera: all-in-one software package for single-molecule data acquisition and data analysis smCamera：用于单分子数据采集和数据分析的一体化软件包

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-12-06 DOI: 10.1007/s40042-024-01243-z

Kyung Suk Lee, Taekjip Ha

{"title":"smCamera: all-in-one software package for single-molecule data acquisition and data analysis","authors":"Kyung Suk Lee, Taekjip Ha","doi":"10.1007/s40042-024-01243-z","DOIUrl":"10.1007/s40042-024-01243-z","url":null,"abstract":"<div>In the last decades, biological applications of single-molecule methods have grown rapidly and researchers with expertise in microscopy and instrumentation have adopted these techniques and advanced them even further. However, practicing single-molecule methods is still challenging for most because of the need for expensive equipments and instrumentation demands as well as complicated data acquisition and analysis workflow consisting of multiple steps using different software in each of them. smCamera is an all-in-one software package which aims to alleviate steep learning curves of the data acquisition and analysis. From recording movies through extraction of time series of single-molecule fluorescence resonance energy transfer (smFRET), everything can be done in a single program without any additional software or programming languages. Although smCamera has not been published before, it has been distributed to facilitate adaption of smFRET experiments and there has been requests for support for this software. We hope that this work answers questions from researchers using smCamera and also provides an opportunity to introduce and distribute smCamera for new users.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 1","pages":"1 - 13"},"PeriodicalIF":0.8,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40042-024-01243-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Near-infrared antireflection coating operated with broad incident angles 近红外增透涂层具有宽入射角

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-12-04 DOI: 10.1007/s40042-024-01240-2

Seungmin Chae, Changwon Lee, Yumi Kim, Yeonsang Park, Yunjong Kim, Sungho Lee, Un Jeong Kim

{"title":"Near-infrared antireflection coating operated with broad incident angles","authors":"Seungmin Chae, Changwon Lee, Yumi Kim, Yeonsang Park, Yunjong Kim, Sungho Lee, Un Jeong Kim","doi":"10.1007/s40042-024-01240-2","DOIUrl":"10.1007/s40042-024-01240-2","url":null,"abstract":"<div>We designed and demonstrated antireflection coatings that exhibit high transmittance regardless of the angle of light incidence. The suggested design is adapted from a universal impedance matching layer model and is optimized by a particle swarm optimization technique. The thin layers separated from a layer with low refractive index is known to exhibit minimal changes in dielectric constant even when incident angle changes. The simulation results obtained by finite difference time domain method showed that designed structure has transmission with more than 96% at the incidence angle of less than 71° in the range of 700–900 nm wavelength. We fabricated the designed structure and measured transmission at different incidence angles to certify simulation results. By measuring transmittance of fabricated sample while changing an incidence angle from 0° to 80° by 10°, we found out that transmittance is more than 90% within the incidence angle of 70°, and the average of transmission at the wavelength of 800 nm measured within the above incidence angle is calculated as 0.916.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 1","pages":"68 - 72"},"PeriodicalIF":0.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939064","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}

引用次数: 0

The control of magnetization reversal by tuning the interlayer exchange interaction in magnetic multilayers 通过调节多层磁层间交换相互作用来控制磁化反转

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-12-02 DOI: 10.1007/s40042-024-01238-w

Seunghoon Yu, Jinhyeok Park, Yonghwan Jo, Woojong Kim, Hyeonsu Kim, Won-Young Choi, Mingu Kim, Dong-Soo Han, Myung-Hwa Jung, Kungwon Rhie, Kyujoon Lee

引用次数: 0

Error analysis study for electron linear accelerator optimized using multi-objective genetic algorithm 多目标遗传算法优化电子直线加速器误差分析研究

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-12-02 DOI: 10.1007/s40042-024-01232-2

Chanmi Kim, Eun-San Kim, Seong Hee Park, Chong Shik Park, Chang-Ki Min, Woo Jun Byeon

{"title":"Error analysis study for electron linear accelerator optimized using multi-objective genetic algorithm","authors":"Chanmi Kim, Eun-San Kim, Seong Hee Park, Chong Shik Park, Chang-Ki Min, Woo Jun Byeon","doi":"10.1007/s40042-024-01232-2","DOIUrl":"10.1007/s40042-024-01232-2","url":null,"abstract":"<div>The injector system of fourth-generation synchrotron radiation accelerators should be optimally designed to produce a good quality beam. In the previous study, we used Multi-Objective Genetic Algorithm (MOGA) to optimize the injector system parameters to meet the beam requirements. To ensure that the injector operation parameters optimized by MOGA fall within practical ranges, we conducted an error analysis. The injector, composed of RF cavities and magnets, includes an analysis of potential errors in RF cavity phase and gradient, as well as magnet strengths across three distinct steps. First, we considered errors that could occur during operation, such as the input phases of RF cavities and the strengths of cavities and magnets. Second, we considered installation errors, including rotation errors of devices. Finally, we simulated scenarios where all errors occurred simultaneously. The simulation results showed that even when errors occurred, the beam quality remained within our acceptable range. Through this error analysis, we confirmed that the linac operation parameters optimized by MOGA are indeed practical and usable.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 1","pages":"23 - 30"},"PeriodicalIF":0.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938837","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}

引用次数: 0

Effect of isolation strategies on epidemic spreading in multiplex networks with an annealed interactions layer 具有退火相互作用层的多路网络中隔离策略对流行病传播的影响

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-12-02 DOI: 10.1007/s40042-024-01239-9

Minsuk Kim, Soon-Hyung Yook

{"title":"Effect of isolation strategies on epidemic spreading in multiplex networks with an annealed interactions layer","authors":"Minsuk Kim, Soon-Hyung Yook","doi":"10.1007/s40042-024-01239-9","DOIUrl":"10.1007/s40042-024-01239-9","url":null,"abstract":"<div>When an unprecedented infectious disease with high mortality and transmissibility emerges, immediate access to vaccines or medicines is often unavailable. Therefore, many health authorities rely on non-pharmaceutical interventions, such as contact tracing combined with isolation, to mitigate the spread of the disease. However, contact tracing is generally effective only for well-known fixed contacts such as regular contacts of an individual. In contrast, random and anonymous infections, which are difficult to trace, may still occur, potentially leading to large-scale outbreaks especially when the disease is highly transmissible. In this study, we test the efficacy of isolation based on contact tracing among fixed regular contacts even when untraceable random contacts exist as well. We simulate this scenario using the susceptible-infected-recover model on double-layered multiplex networks, where one layer has a fixed structure, while the other layer is time-varying. Our numerical results indicate that tracing the secondary contacts significantly reduces both the final epidemic size and the number of isolations per unit time, even with imperfect traceability. Our findings suggest that the isolation protocol combined with secondary contact tracing can be an effective measure against unprecedented infectious diseases, applicable to a broad range of fixed contact structures.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 1","pages":"73 - 84"},"PeriodicalIF":0.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938838","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}

引用次数: 0

Study of dielectric and magnetic properties with Fe76Si19.4Nb2.7Cu1.7P0.2 ribbons Fe76Si19.4Nb2.7Cu1.7P0.2带介电和磁性能研究

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-11-26 DOI: 10.1007/s40042-024-01233-1

Xiu-Zhi Duan, Jian-Qing Fu, Ai-Wen Ni

{"title":"Study of dielectric and magnetic properties with Fe76Si19.4Nb2.7Cu1.7P0.2 ribbons","authors":"Xiu-Zhi Duan, Jian-Qing Fu, Ai-Wen Ni","doi":"10.1007/s40042-024-01233-1","DOIUrl":"10.1007/s40042-024-01233-1","url":null,"abstract":"<div>The as-cast and annealed Fe76Si19.4Nb2.7Cu1.7P0.2 ribbons with width of 2.5 cm prepared by a single-roller cooling method were investigated. The structural properties of ribbons were studied by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The XRD result shows the α-Fe crystal phase of annealed film. The average crystallite sizes of the as-cast and annealed ribbons are about 28 nm and 43 nm obtained from EF-SEM. The dielectric and magnetic properties of ribbons were tested over frequency ranges of 5 MHz to 300 MHz and 5 MHz to 3000 MHz using an Impedance Analyzer, respectively. The dielectric constant and dielectric loss of the as-cast ribbon decreases from 4.3 × 105 to 180 and from 3.01 to 0.06, while that of annealed ribbon decreases from 2.5 × 104 to 180 and from 3.01 to 1.31. The permeability decreased with increasing frequency at first of each ribbon and the value of annealed ribbon is bigger. It was observed that the permeability loss value of annealed ribbon is smaller at first and then bigger than that of as-cast ribbon. The smallest values of permeability of the as-cast and annealed ribbons are about 1.4 and 1.8. The minimum of the permeability loss of the as-cast ribbon is 0.008. The magnetic hysteresis loops were investigated using a vibrating sample magnetometer. The saturation magnetizations of the as-cast and annealed ribbons are 113 emu g−1 and 123 emu g−1. The coercive fields of the as-cast and annealed ribbons are 259 A m−1 and 1130 A m−1. The saturation magnetization and coercive field could become bigger due to the crystallize property.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 1","pages":"56 - 61"},"PeriodicalIF":0.8,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939346","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}

引用次数: 0

Unveiling friction mechanism in exfoliated graphene 揭示剥离石墨烯中的摩擦机制

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-11-21 DOI: 10.1007/s40042-024-01217-1

Inchul Choi, Minjeong Kim, Suhyun Kim, Sunhong Ahn, Do-hyun Park, Un Jeong Kim, Hyun-jong Chung

引用次数: 0