Journal of the Optical Society of Korea最新文献_第3页

Two-Dimensional Sub-diffraction-limited Imaging by an Optimized Multilayer Superlens 优化多层超透镜的二维亚衍射限制成像

Journal of the Optical Society of Korea Pub Date : 2016-12-25 DOI: 10.3807/JOSK.2016.20.6.653

M. Ahmadi, K. Forooraghi, R. Faraji-Dana, M. Ghaffari‐Miab

{"title":"Two-Dimensional Sub-diffraction-limited Imaging by an Optimized Multilayer Superlens","authors":"M. Ahmadi, K. Forooraghi, R. Faraji-Dana, M. Ghaffari‐Miab","doi":"10.3807/JOSK.2016.20.6.653","DOIUrl":"https://doi.org/10.3807/JOSK.2016.20.6.653","url":null,"abstract":"An optimized multilayer superlens is designed, using a rigorous and efficient approach based on the method of moments (MoM) in conjunction with a simulated annealing (SA) algorithm. For the MoM solution, fast evaluation of closed-form Green’s functions (GFs) in the spatial domain is performed by applying the complex-image (CI) technique, which obviates the time-consuming numerical evaluation of Sommerfeld integrals. The imaging capability of the superlens is examined with the correlation coefficient; results show that using circular polarization for the incident wave can improve this coefficient. To validate the proposed method, finite-element-based simulations are exploited, which reveal the method’s accuracy and computational efficiency. Simulation results indicate that the designed structure is capable of producing two-dimensional sub-diffraction-limited images in the visible range, which may make it more versatile for practical applications. Finally, as a considerable finding, it is demonstrated for the proposed design that using circularly polarized illumination provides improved super-resolving performance, compared to linearly polarized illumination.","PeriodicalId":49986,"journal":{"name":"Journal of the Optical Society of Korea","volume":"20 1","pages":"653-662"},"PeriodicalIF":0.0,"publicationDate":"2016-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70141416","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: 1

The Influence of the Initial Spot Size of a Double Half-Gaussian Hollow Beam on Its Propagation Characteristics in a the Turbulent Atmosphere 双半高斯空心光束初始光斑尺寸对其在湍流大气中传播特性的影响

Journal of the Optical Society of Korea Pub Date : 2016-10-25 DOI: 10.3807/JOSK.2016.20.5.541

D. Yuan, Li Shutao, Guan Jia-Yin, Zhang Xi-he, J. Guangyong

引用次数: 0

Irradiance Distribution in East Sea by Using Measured Optical Properties for Squid Jigging Vessels 用测量的鱿鱼跳汰船光学特性研究东海的辐照度分布

Journal of the Optical Society of Korea Pub Date : 2016-10-25 DOI: 10.3807/JOSK.2016.20.5.547

Jae-Yu Bae, Sang-Woo Kim, T. Park, Hyun-Ja Cho, YoungDuk An, Sanghyun A Kim, HyunWoon Ra, Young-Moo Cho, JaeSeok Koh, Mee-Suk Jung

{"title":"Irradiance Distribution in East Sea by Using Measured Optical Properties for Squid Jigging Vessels","authors":"Jae-Yu Bae, Sang-Woo Kim, T. Park, Hyun-Ja Cho, YoungDuk An, Sanghyun A Kim, HyunWoon Ra, Young-Moo Cho, JaeSeok Koh, Mee-Suk Jung","doi":"10.3807/JOSK.2016.20.5.547","DOIUrl":"https://doi.org/10.3807/JOSK.2016.20.5.547","url":null,"abstract":"A fishing lamp is the instrument for attracting distributed fish to a certain place, and is the lighting system mainly used in fishery. In the inshore fishing, most fishing lamps are used for squid and hairtail jigging fishing, and the light source of the fishing lamps mainly used is metal halide with 1.5 KW in electric power consumption. We will analyze the irradiance distribution according to depth because squid is attracted towards light. To analyze irradiance distribution by such fishing lamps, data for seawater Type-II among the seawater types defined in 1976 are applied to East Sea. However, the Type-II data have limitations in analyzing precise seawater transmission characteristics, due to insufficient information on deep seawater. This paper analyzed the irradiance distribution of fishing lamps using the measurement of transmission characteristics in the seawater in East Sea up to 100 m underwater instead of Type-II data, which is not sufficient for transmission. A compensation factor was drawn between the actual measurement data and Type-II data through seawater transmission characteristics simulation.","PeriodicalId":49986,"journal":{"name":"Journal of the Optical Society of Korea","volume":"20 1","pages":"547-556"},"PeriodicalIF":0.0,"publicationDate":"2016-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70140485","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: 1

A Power-adjustable Fully-integrated CMOS Optical Receiver for Multi-rate Applications 用于多速率应用的功率可调全集成CMOS光接收器

Journal of the Optical Society of Korea Pub Date : 2016-10-25 DOI: 10.3807/JOSK.2016.20.5.623

Kang-Yeob Park, Eun-Jung Yoon, W. Oh

引用次数: 1

Effective Sensing Volume of Terahertz Metamaterial with Various Gap Widths 不同间隙宽度的太赫兹超材料的有效传感体积

Journal of the Optical Society of Korea Pub Date : 2016-10-25 DOI: 10.3807/JOSK.2016.20.5.628

SaeJune Park, S. Yoon, Y. Ahn

引用次数: 7

Extraction of Distance Information with Nonlinear Correlation of Photon-Counting Integral Imaging 光子计数积分成像中非线性相关距离信息的提取

Journal of the Optical Society of Korea Pub Date : 2016-10-25 DOI: 10.3807/JOSK.2016.20.5.579

S. Yeom

引用次数: 1

Impact of CO2Laser Pretreatment on the Thermal Endurance of Bragg Gratings co2激光预处理对Bragg光栅热耐久性的影响

Journal of the Optical Society of Korea Pub Date : 2016-10-25 DOI: 10.3807/JOSK.2016.20.5.575

D. Gunawardena, M. Lai, K. Lim, H. Ahmad

引用次数: 0

Ex vivo High-resolution Optical Coherence Tomography (OCT) Imaging of Pleural Reaction after Pleurodesis Using Talc 滑石粉胸膜切除术后胸膜反应的体外高分辨率光学相干断层成像(OCT)研究

Journal of the Optical Society of Korea Pub Date : 2016-10-01 DOI: 10.3807/JOSK.2016.20.5.607

Yeh-Chan Ahn, C. Oak, Jung-Eun Park, M. Jung, Jae-Hun Kim, Hae-Young Lee, Sung Won Kim, Eun‐Kee Park, M. Jung

{"title":"Ex vivo High-resolution Optical Coherence Tomography (OCT) Imaging of Pleural Reaction after Pleurodesis Using Talc","authors":"Yeh-Chan Ahn, C. Oak, Jung-Eun Park, M. Jung, Jae-Hun Kim, Hae-Young Lee, Sung Won Kim, Eun‐Kee Park, M. Jung","doi":"10.3807/JOSK.2016.20.5.607","DOIUrl":"https://doi.org/10.3807/JOSK.2016.20.5.607","url":null,"abstract":"The pleura is known as an end target organ of exposure to toxic\u0000environmental materials such as fine particulate matter and asbestos.\u0000Moreover, long-term exposure to hazardous materials can eventually lead to\u0000fatal lung disease such as diffuse pleural fibrosis or mesothelioma. Chest\u0000computed tomography (CT) and ultrasound are gold standard imaging\u0000modalities for detection of advanced pleural disease. However, a\u0000diagnostic tool for early detection of pleural reaction has not been\u0000developed yet due to difficulties in imaging ultra-fine structure of the\u0000pleura. Optical coherence tomography (OCT), which provides cross-sectional\u0000images of micro tissue structures at a resolution of 2-10 µm, can\u0000image the mesothelium with a thickness of ~100 µm and therefore\u0000enables investigation of the early pleural reaction. In this study, we\u0000induced the early pleural reaction according to a time sequence after\u0000pleurodesis using talc, which has been widely used in the clinical field.\u0000The pleural reaction in talc grouped according to the time sequence (1st,\u00002nd, 4th weeks) showed a significant thickening (average thickness: 45\u0000± 7.5 µm, 80 ± 10.7 µm, 90 ± 12.5 µm), while\u0000the pleural reaction in sham and normal groups showed pleural change from\u0000normal to minimal thickening (average thickness: 16 ± 5.5 µm, 17\u0000± 4.5 µm, 15 ± 6.5 µm, and 12 ± 7.5 µm, 13\u0000± 2.5 µm, 12 ± 3.5 µm). The measurement of pleural\u0000reaction by pathologic examinations was well-matched with the measurement\u0000by OCT images. This is the first study for measuring the thickness of\u0000pleural reactions using a biophotonic modality such as OCT. Our results\u0000showed that OCT can be useful for evaluating the early pleural\u0000reaction.","PeriodicalId":49986,"journal":{"name":"Journal of the Optical Society of Korea","volume":"20 1","pages":"607-613"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70140872","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: 1

A Breaching of Electromagnetic Shielding by Narrow Aperture in Metal Film 金属薄膜窄孔对电磁屏蔽的破坏

Journal of the Optical Society of Korea Pub Date : 2016-10-01 DOI: 10.3807/JOSK.2016.20.5.563

D. Park, H. Chu, J. Kyoung, S. Choi

引用次数: 1

Calculating the Threshold Energy of the Pulsed Laser Sintering of Silver and Copper Nanoparticles 脉冲激光烧结纳米银和纳米铜的阈值能量计算

Journal of the Optical Society of Korea Pub Date : 2016-10-01 DOI: 10.3807/JOSK.2016.20.5.601

Changmin Lee, J. Hahn

{"title":"Calculating the Threshold Energy of the Pulsed Laser Sintering of Silver and Copper Nanoparticles","authors":"Changmin Lee, J. Hahn","doi":"10.3807/JOSK.2016.20.5.601","DOIUrl":"https://doi.org/10.3807/JOSK.2016.20.5.601","url":null,"abstract":"In this study, in order to analyze the low-temperature sintering\u0000 process of silver and copper nanoparticles, we calculate their melting\u0000 temperatures and surface melting temperatures with respect to particle\u0000 size. For this calculation, we introduce the concept of mean-squared\u0000 displacement of the atom proposed by Shi (1994). Using a parameter defined\u0000 by the vibrational component of melting entropy, we readily obtained the\u0000 surface and bulk melting temperatures of copper and silver nanoparticles.\u0000 We also calculated the absorption cross-section of nanoparticles for\u0000 variation in the wavelength of light. By using the calculated absorption\u0000 cross-section of the nanoparticles at the melting temperature, we obtained\u0000 the laser threshold energy for the sintering process with respect to\u0000 particle size and wavelength of laser. We found that the absorption\u0000 cross-section of silver nanoparticles has a resonant peak at a wavelength\u0000 of close to 350 nm, yielding the lowest threshold energy. We calculated\u0000 the intensity distribution around the nanoparticles using the\u0000 finite-difference time-domain method and confirmed the resonant excitation\u0000 of silver nanoparticles near the wavelength of the resonant\u0000 peak.","PeriodicalId":49986,"journal":{"name":"Journal of the Optical Society of Korea","volume":"8 1","pages":"601-606"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70140833","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: 4