Optics Communications最新文献

Photonic physically unclonable functions using randomly positioned aluminum nanoholes 利用随机定位的铝纳米孔实现光子物理不可克隆功能

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-11-04 DOI: 10.1016/j.optcom.2024.131273

{"title":"Photonic physically unclonable functions using randomly positioned aluminum nanoholes","authors":"","doi":"10.1016/j.optcom.2024.131273","DOIUrl":"10.1016/j.optcom.2024.131273","url":null,"abstract":"<div><div>With the advancement of the Internet of Things, the volume of information and communication has significantly increased, highlighting the critical need for enhanced data security. Physically unclonable functions (PUFs), which generate encryption keys through nondeterministic and replication-resistant methods, have been proposed as a solution. Among the various types of PUFs, optical-based PUFs are gaining attention owing to their ability to leverage light for rapid measurements and their superior resistance and complexity to replication compared to other methods. In this study, we proposed a photonic PUF based on an aluminum film structure with randomly positioned nanoholes on a substrate. Light transmission through this structure resulted in scattering owing to localized and propagating surface plasmon resonances. The resulting image was digitized to generate an encryption key. Our tests involved adjusting the filling factor (FF) and pixel size, yielding a high randomness of 49.87% and a high bit density of 1.6 × 10<sup>7</sup> bits/cm<sup>2</sup>. The independent bits produced a total of 258 bits, closely matching the actual bit count of 256 bits. Furthermore, applying a Gaussian distribution to the hole sizes, assuming a more realistic scenario, yielded favorable results. This structure is cost-effective owing to the simplicity of its materials, production method, and design. Additionally, its compact size of 40 μm × 40 μm makes it ideal for miniaturization and integration into various applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586943","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

Lamellar beam with similar propagation and imaging characteristics to a Bessel beam 传播和成像特性与贝塞尔光束相似的层状光束

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-11-04 DOI: 10.1016/j.optcom.2024.131275

引用次数: 0

Toward a fast and non-darkroom solution for speckle correlation based scattering imaging 基于斑点相关散射成像的快速无暗室解决方案

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-11-03 DOI: 10.1016/j.optcom.2024.131274

{"title":"Toward a fast and non-darkroom solution for speckle correlation based scattering imaging","authors":"","doi":"10.1016/j.optcom.2024.131274","DOIUrl":"10.1016/j.optcom.2024.131274","url":null,"abstract":"<div><div>Speckle correlation-based scattering imaging is an ingenious field, as it allows for the efficient reconstruction of object images using computational techniques in a simple setup. However, this method typically necessitates high-contrast speckle images captured in a darkroom environment, restricting its applicability to specific scenarios. Here, we present a fast and non-darkroom imaging framework, namely FNDI, for reconstructing objects through scattering media under ambient light interference. Specifically, a speckle illumination model is established guided by the total variational Retinex (TV-Retinex) theory, and the speckle illumination component is adjusted to obtain an enhanced speckle with significantly improved contrast. Then, a modified Fienup algorithm with the iteration-driven shrinkwrap (IDS) strategy is employed to rapidly reconstruct the object image through tens of iterations. Extensive experiments are conducted under different lighting conditions to evaluate FNDI in comparison with existing non-darkroom methods and the classical speckle correlation method. The results demonstrate that FNDI is effective and efficient, making it highly attractive for practical scattering imaging applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593719","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

An improvement of optical PPM communication with high security 高安全性光学 PPM 通信的改进

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-11-01 DOI: 10.1016/j.optcom.2024.131249

引用次数: 0

Multi-wavelength spectral reconstruction with localized speckle pattern 利用局部斑点模式进行多波长光谱重建

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-11-01 DOI: 10.1016/j.optcom.2024.131266

引用次数: 0

Terahertz refractive index control of 3D printing materials by UV exposure 通过紫外线照射控制 3D 打印材料的太赫兹折射率

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-11-01 DOI: 10.1016/j.optcom.2024.131262

{"title":"Terahertz refractive index control of 3D printing materials by UV exposure","authors":"","doi":"10.1016/j.optcom.2024.131262","DOIUrl":"10.1016/j.optcom.2024.131262","url":null,"abstract":"<div><div>Recently, significant progress has been made in the development of THz optics based on metamaterials to overcome the limited availability of suitable materials for conventional optics. Although 3D printing technology is a promising method for rapidly fabricating these subwavelength structures, the structural degree of freedom for 3D printed metamaterials is still limited by the optical properties of printing materials. In this study, we controlled the THz refractive index and extinction coefficient of the 3D printing resin by UV exposure doses during the printing process. Samples were fabricated as uniform plates under different curing conditions in printing, and their optical properties were measured in the range between 0.3 THz and 2.0 THz using THz time-domain spectroscopy (THz-TDS). The refractive index and extinction coefficient were changed from 1.65 to 1.80, and from 0.04 to 0.12, respectively, with increasing UV doses from 1 mJ/cm<sup>2</sup>, which allows resin to solidify and become printable, to 100 mJ/cm<sup>2</sup>, where the optical changes become almost saturated. The results provide insights into optimizing the fabrication process of THz devices, even those with a gradient and complex refractive index profile, by utilizing 3D printing technology for a broad range of applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593715","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

Physical layer security enhancement scheme for PDM-16QAM system based on seven-dimensional CNN hyperchaotic encryption 基于七维 CNN 超混沌加密的 PDM-16QAM 系统物理层安全增强方案

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-10-31 DOI: 10.1016/j.optcom.2024.131259

引用次数: 0

Incoherent, chimera and coherent behaviors in ring of locally and array of non-locally coupled current-modulated edge-emitting semiconductor lasers 局部耦合电流调制边缘发射半导体激光器环和阵列中的不相干、嵌合和相干行为

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-10-29 DOI: 10.1016/j.optcom.2024.131254

{"title":"Incoherent, chimera and coherent behaviors in ring of locally and array of non-locally coupled current-modulated edge-emitting semiconductor lasers","authors":"","doi":"10.1016/j.optcom.2024.131254","DOIUrl":"10.1016/j.optcom.2024.131254","url":null,"abstract":"<div><div>The investigation in this paper on the ring of locally and the array of non-locally coupled current-modulated (CM) edge-emitting semiconductor lasers (EESLs) is numerical. The dynamical characteristics of a ring of locally coupled CMEESLs display incoherent and chimera behaviors for small values of coupling strength while coherent behaviors are observed for large values of coupling strength. The dynamical characteristics of a circlet of non-locally twained CMEESLs reveal that the twaining force is of great importance when considering the coherent and incoherent characteristics of the nodes found inside the circlet. Considering the twaining force in an infinitesimal interval, the array of non-locally coupled CMEESLs displays chimera states. Incrementing the twaining force, the array of non-locally coupled CMEESLs is in a state of coherency and a total destruction of the chimera states is observed. The findings in this paper suggest that the ring of locally and array of non-locally coupled CMEESLs under study could have significant implications for applications in neuro-inspired computing, particularly in neuromimetic computing.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593716","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

Performance evaluation of ∼2.1 μm microchip laser operation in Ho3+ doped germanate glass 在掺杂 Ho3+ 的锗酸盐玻璃中运行 2.1 μm 微芯片激光器的性能评估

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-10-28 DOI: 10.1016/j.optcom.2024.131253

引用次数: 0

Strongly localized nanolaser based on the vertical dipole governed by bound states in the continuum 基于受连续体中束缚态支配的垂直偶极子的强局域纳米激光器

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-10-28 DOI: 10.1016/j.optcom.2024.131255

引用次数: 0