Photonics and Nanostructures-Fundamentals and Applications最新文献

224-fs soliton pulses generation at 1μm from ytterbium-doped fiber laser with CoTe2 nanosheets as an ultrafast modulator 以 CoTe2 纳米片为超快调制器，在 1μm 波长下从掺镱光纤激光器中产生 224-fs 孤子脉冲

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-30 DOI: 10.1016/j.photonics.2024.101324

{"title":"224-fs soliton pulses generation at 1μm from ytterbium-doped fiber laser with CoTe2 nanosheets as an ultrafast modulator","authors":"","doi":"10.1016/j.photonics.2024.101324","DOIUrl":"10.1016/j.photonics.2024.101324","url":null,"abstract":"<div><div>Transition metal ditellurides (TMDTs) have numerous attractive properties, making them suitable for a wide range of applications. In this study, cobalt ditelluride (CoTe<sub>2</sub>) nanosheets, a promising TMDT for photonic applications, were prepared using an ultrasound-enhanced liquid phase exfoliation (LPE) method. A novel saturable absorber (SA) employing CoTe<sub>2</sub> nanosheets was then fabricated by optically depositing them on microfiber. The nonlinear optical modulation properties of the CoTe<sub>2</sub> SA were investigated. A high-performance 1 μm ultrafast fiber laser was demonstrated by incorporating newly developed CoTe<sub>2</sub> nanosheets-based SA in a ring cavity ytterbium-doped fiber laser (YDFL). The dynamical behaviour of the proposed passively mode-locked YDFL in response to variations in pump optical power was investigated. The findings reveal that the device achieved a modulation depth of 2.5 %, and saturation light intensity of 30.6 MW/cm<sup>2</sup>. Moreover, a stable and robust mode-locked soliton optical pulse sequence with a fundamental repetition frequency of 3.089 MHz, and a pulse duration of 224 fs was generated at 1032 nm. The proposed YDFL, being all-fiber, compact, and cost-effective, is set to find extensive applications in various domains, including optical fiber communication, sensing, and biomedical imaging.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593162","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

A hybrid mode splitter for separation and excitation of photonic crystal odd and even modes using plasmonic waveguides 利用等离子波导分离和激发光子晶体奇数和偶数模式的混合模式分离器

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-26 DOI: 10.1016/j.photonics.2024.101323

{"title":"A hybrid mode splitter for separation and excitation of photonic crystal odd and even modes using plasmonic waveguides","authors":"","doi":"10.1016/j.photonics.2024.101323","DOIUrl":"10.1016/j.photonics.2024.101323","url":null,"abstract":"<div><div>This study introduces a mode splitter through a novel coupling mechanism between photonic crystal waveguides and metal-insulator-metal plasmonic waveguides. Notably, the proposed structure demonstrates the capability to excite both odd and even modes within the photonic crystal waveguide. Numerical simulations of this structure were conducted using the finite difference time domain (FDTD) method. Our numerical analysis reveals an exceptional transmittance of 95 % at the waveguide intersection for the wavelength of 1550 nm. The successful coupling of plasmonic waveguides to photonic crystal waveguides unveils a vast array of opportunities for designing innovative devices that harness the synergistic potential arising from the distinctive characteristics of surface plasmons and photonic crystals. An inherent advantage of this design lies in its simple topology, enabling cost-effective and precise manufacturing processes. This device offers the ability to accurately separate and identify output modes. Additionally, we utilize this coupler in the design of a highly efficient power divider that not only achieves high transmittance but also provides adjustable control over the output power level.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555644","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

Temperature-modulated acetone monitoring using Al2O3-coated evanescent wave fiber optic sensors 使用 Al2O3 涂层蒸发波光纤传感器进行温度调制丙酮监测

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-24 DOI: 10.1016/j.photonics.2024.101322

{"title":"Temperature-modulated acetone monitoring using Al2O3-coated evanescent wave fiber optic sensors","authors":"","doi":"10.1016/j.photonics.2024.101322","DOIUrl":"10.1016/j.photonics.2024.101322","url":null,"abstract":"<div><div>This paper presents an experimental study of a fiber-optic-based acetone sensor and its temperature effects for use as a breath analyzer to detect acetone in exhaled breath. The study employs fiber optic evanescent wave-based acetone sensing, utilizing sputter coated Aluminium Oxide (Al<sub>2</sub>O<sub>3</sub>)-coated probes fabricated via clad modification technique. The optical fibers were coated with Al<sub>2</sub>O<sub>3</sub> to achieve thicknesses of 247.03 nm, 334.05 nm, and 468.75 nm. The sensor probes were characterized using, Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive Spectroscopy (EDS), X-ray Diffraction (XRD), Ultraviolet-Visible (UV-Vis) Spectroscopy, and Spectroscopic Ellipsometry for uniformity, elemental, optical constants, and thickness of the Al<sub>2</sub>O<sub>3</sub>. The spectral responses of the probes were analyzed for acetone concentrations ranging from 0 to 100 ppm, with temperature modulation from room temperature to 100 °C. The probe with a ∼334 nm thick Al<sub>2</sub>O<sub>3</sub> coating exhibited the highest response, reaching 6.2 % at 100 °C in 100 ppm acetone. Linear regression revealed that the ∼334 nm coated probe had the highest sensitivity at 5.98 counts/ppm. The sensor showed response and recovery times of approximately 12 and 17 seconds, respectively. This study underscores the stability and repeatability of temperature-modulated Al<sub>2</sub>O<sub>3</sub>-coated fiber optic sensors for selective acetone detection in various non-invasive applications.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555643","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

Cage-like micro-scaffolds fabricated by DLW method for cell investigation 利用 DLW 方法制作用于细胞研究的笼状微支架

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-11 DOI: 10.1016/j.photonics.2024.101321

引用次数: 0

Bifunctional terahertz metamaterial device with switchable properties between transmission and broadband absorption 可在传输和宽带吸收之间切换特性的双功能太赫兹超材料器件

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-09 DOI: 10.1016/j.photonics.2024.101317

{"title":"Bifunctional terahertz metamaterial device with switchable properties between transmission and broadband absorption","authors":"","doi":"10.1016/j.photonics.2024.101317","DOIUrl":"10.1016/j.photonics.2024.101317","url":null,"abstract":"<div><div>A bifunctional terahertz metamaterial device with switchable properties between transmission and broadband absorption is proposed. The simulated results show that the switchable functional characteristics of the bifunctional terahertz metamaterial device can be achieved by taking advantage of the phase transition property of VO<sub>2</sub>. When VO<sub>2</sub> is in the insulating state, there are transmission spectra with a maximum transmittance of 90 % and a minimum transmittance of 25 % in the frequency range from 1 THz to 10 THz. Meanwhile, transmission spectra be adjusted by controlling the Fermi level of graphene. When VO<sub>2</sub> is in the fully metal state, the broadband absorptivity achieves over 90 % in the frequency range from 2.54 THz to 7.65 THz. Not only that, the absorption spectra can be continuously adjusted by controlling the conductivity of VO<sub>2</sub> from 20 to 200000 S/m. Alternatively, the proposed bifunctional terahertz metamaterial device can work and show the same absorption spectra when the conductivity of VO<sub>2</sub> is 200000 S/m under TM and TE polarized normal incidences. Our current research work has a potential to provide a valuable reference for the advancement of transmissive and broadband absorbent metamaterial devices in the terahertz range.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446927","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

Design and optimization of a polarization-insensitive terahertz metamaterial absorber for sensing applications 设计和优化用于传感应用的偏振不敏感太赫兹超材料吸收器

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-09 DOI: 10.1016/j.photonics.2024.101314

引用次数: 0

Constraints on co- and cross-polarization reflection and transmission of Babinet-complementary metasurfaces 巴比内互补元表面的同极化和跨极化反射与透射的约束条件

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-09 DOI: 10.1016/j.photonics.2024.101320

引用次数: 0

CMOS-compatible plasmonic magnetic field sensor: An alternative approach using ultra-compact MIM configuration CMOS 兼容型等离子体磁场传感器：使用超紧凑 MIM 配置的替代方法

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-05 DOI: 10.1016/j.photonics.2024.101319

引用次数: 0

Reconfigurable intelligent surface assisted by computer vision for increasing coverage area in mobile communication systems 利用计算机视觉辅助可重构智能表面，扩大移动通信系统的覆盖范围

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-03 DOI: 10.1016/j.photonics.2024.101318

引用次数: 0

Kerr nonlinearity effect on the stability of Wannier-Stark states in active optical systems 克尔非线性对有源光学系统中万尼尔-斯塔克态稳定性的影响

IF 2.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-09-27 DOI: 10.1016/j.photonics.2024.101316

引用次数: 0