Optics Communications最新文献_第2页

MXene-based hybrid plasmonic waveguide by inserting low refractive index layer for long-range propagation

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-25 DOI: 10.1016/j.optcom.2025.131764

Ruozhang Xing, Xiujuan Zou, Jing Chen

{"title":"MXene-based hybrid plasmonic waveguide by inserting low refractive index layer for long-range propagation","authors":"Ruozhang Xing, Xiujuan Zou, Jing Chen","doi":"10.1016/j.optcom.2025.131764","DOIUrl":"10.1016/j.optcom.2025.131764","url":null,"abstract":"<div><div>The unique plasmonic properties of MXene in the near-infrared region have attracted increasing attention, but the surface plasmons of MXene still face problems of poor confinement and large propagation loss. In this work, an MXene hybrid planar waveguide at the communication wavelength was proposed by inserting a low refractive index layer beneath the MXene materials. The introduction of this low refractive index dielectric layer (SiO<sub>2</sub>) can dramatically expand the propagation distance and improve the localization of the electric field. When the thickness of SiO<sub>2</sub> is only 20 nm, the propagation distance can be increased to over <span><math><mrow><mn>10</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>, which is 100 times that of MXene waveguides without SiO<sub>2</sub> layers. MXene hybrid plasmonic waveguides are competitive compared to other typical plasmonic waveguides, such as Au, Ag, and graphene at the wavelength of <span><math><mrow><mn>1</mn><mo>.</mo><mn>55</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>. The silicon-on-insulator (SOI)-based MXene hybrid plasmonic waveguide was further designed. By optimizing the structure, the figure of merit has risen by an order of magnitude in contrast to MXene waveguide structures. These findings will contribute to the practical application and development of MXene surface plasmonic components.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131764"},"PeriodicalIF":2.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715456","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

Helicity density of higher-order Poincaré beams in tight focus

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-25 DOI: 10.1016/j.optcom.2025.131803

S.S. Stafeev , V.D. Zaitsev , V.V. Kotlyar

引用次数: 0

Broadband high-resolution line-imaging spectrometer with a large working distance range

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-25 DOI: 10.1016/j.optcom.2025.131802

Qinghua Yang

{"title":"Broadband high-resolution line-imaging spectrometer with a large working distance range","authors":"Qinghua Yang","doi":"10.1016/j.optcom.2025.131802","DOIUrl":"10.1016/j.optcom.2025.131802","url":null,"abstract":"<div><div>A broadband high-resolution line-imaging spectrometer (<strong>BHLIS</strong>) is presented, which consists of only two identical linear microlens arrays, one linear stop array, one parallel planar transmission grating pair and one area array detector. The detector is divided into many small rectangular pixel arrays, each corresponding to one calculated wavelength and one target unit. The BHLIS can achieve high spectral resolution (of the order of 1 nm) over a broadband wavelength range (e.g. 250 nm–380 nm, or 400 nm–700 nm) in the ultraviolet–visible spectral region. For existing imaging spectrometers, the angular resolution does not vary with the measuring distance, but the larger the measuring distance, the lower the spatial resolution. However, for all measuring distances over a large working distance range, the spatial resolution in the vertical direction of the BHLIS is approximately equal to the aperture size of a microlens, and the spatial resolution in the horizontal direction of the BHLIS is approximately equal to the distance between the centers of two adjacent microlenses in a linear microlens array. Since the aperture size of a microlens can be very small (e.g. 0.32 mm, 0.2 mm, or smaller) and the corresponding distance between the centers of two adjacent microlenses in a linear microlens array can be very small (e.g. 0.36 mm, 0.24 mm, or smaller), the BHLIS can obtain a high spatial resolution. The BHLIS is a unique concept that uses only one frame of data to obtain both broadband fine spectra (in the ultraviolet–visible spectral region) and high-resolution spatial images of a target row over a large working distance range.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131802"},"PeriodicalIF":2.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715516","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

Mitigating thermal blooming effect of the atmosphere using time-dependent rotationally-symmetric power-exponent-phase vortex beam

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-25 DOI: 10.1016/j.optcom.2025.131804

Fangcheng Yan , Mingming Zhang , Jie Xu , Shengchuang Bai , Jun Liu , Youyou Hu

{"title":"Mitigating thermal blooming effect of the atmosphere using time-dependent rotationally-symmetric power-exponent-phase vortex beam","authors":"Fangcheng Yan , Mingming Zhang , Jie Xu , Shengchuang Bai , Jun Liu , Youyou Hu","doi":"10.1016/j.optcom.2025.131804","DOIUrl":"10.1016/j.optcom.2025.131804","url":null,"abstract":"<div><div>The thermal blooming effect induced by high-power laser beams propagating through the atmosphere can result in a degradation of beam quality. This article proposes the utilization of time-dependent rotationally-symmetric power-exponent-phase vortex beam (TDRSPEPVB) as a means to mitigate thermal blooming effect during propagation in the atmosphere. Firstly, TDRSPEPVB is obtained by introducing a time factor into the phase term of rotationally-symmetric power-exponent-phase vortex beam (RSPEPVB). A comparative analysis was conducted on the thermal blooming effects of TDRSPEPVB and RSPEPVB in the atmosphere. The results indicate that TDRSPEPVB exhibits superior anti-thermal blooming ability compared to RSPEPVB and better preserves the shape of light spots during propagation through the atmosphere. These findings suggest that rotational motion can effectively mitigate thermal blooming effect for petal-like shaped high-order mode beams, providing valuable guidance for their application in atmospheric conditions.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131804"},"PeriodicalIF":2.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715452","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

Fast prediction on the transmission of conical conformal frequency selective surfaces based on fully connected networks

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-24 DOI: 10.1016/j.optcom.2025.131797

Yong Hu , Kexin Wen , Jiajun Zhang , Weijie Shi , Jiaqi Li , Weibing Lu

{"title":"Fast prediction on the transmission of conical conformal frequency selective surfaces based on fully connected networks","authors":"Yong Hu , Kexin Wen , Jiajun Zhang , Weijie Shi , Jiaqi Li , Weibing Lu","doi":"10.1016/j.optcom.2025.131797","DOIUrl":"10.1016/j.optcom.2025.131797","url":null,"abstract":"<div><div>Frequency Selective Surfaces (FSS) have significant applications in Near-field Enhancement and Radar Cross-Section (RCS) reduction. In practical applications, to accommodate carriers with complex shapes, FSS should work as the conformal shape rather than a planar shape. Typically, the Conformal Frequency Selective Surfaces (CFSS) are complex structures, the physical mechanisms within this system are complicated and the simulation for the electromagnetic properties are high time-consumed, giving a challenge for fast analysis and designs of the CFSS. In this study, the physical mechanism of a conical CFSS with Y-shaped holes is studied, including incident angle, polarization, array size and curvature. Furthermore, a dataset comprising 160 transmission curves has been built and a Fully Connected Network (FCN) is employed to predict the transmission of conical CFSS, with an average absolute deviation less than 0.02. Besides, utilized with Gradient Descent algorithm (GD) and FCN, a CFSS exhibiting high transmission within the frequency range of 14.50–15.00 GHz has been designed. This work realizes rapid analysis and design of CFSS with much fewer time and computing resources compared to methods based on full-wave simulations, opening new possibilities in fast design of the CFSS.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131797"},"PeriodicalIF":2.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747389","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

Reconfigurable vortex generation based on phase change material

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-24 DOI: 10.1016/j.optcom.2025.131799

Jiankai Tang , Xinghong Chen , Wei Tao , Yifei Mao

{"title":"Reconfigurable vortex generation based on phase change material","authors":"Jiankai Tang , Xinghong Chen , Wei Tao , Yifei Mao","doi":"10.1016/j.optcom.2025.131799","DOIUrl":"10.1016/j.optcom.2025.131799","url":null,"abstract":"<div><div>The development of reconfigurable optical vortex (OV) generators is of great value because dynamic switching between different orbital angular momentum (OAM) states not only enables high-density data transmission, but also significantly enhances the security of wired and wireless communication networks. However, current dynamic OV generation methods face challenges in terms of alignment conditions, fabrication robustness, device integration and miniaturization, as well as OV generation purity. Here, we theoretically propose a reconfigurable OV generation method by dynamically engineering the photonic band structures via phase change material. OVs are generated by exploiting the winding topology properties of momentum-space polarization distributions around bound states in the continuum (BICs). By switching between different states of phase change materials, the interaction between the target BIC and the incident light can be flexibly selected to achieve OV with tunable OAM. In this work, the geometric phase gradient is generated in momentum space, thereby eliminating the need of beam alignment in real space. The purity of generated OVs approaches nearly 100 % in theory and exhibits robustness against fabrication errors to a certain extent. Using low-loss phase change materials to control the topological properties of the system offers new opportunities for tunable optical devices, on-chip optical communications and other applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131799"},"PeriodicalIF":2.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746582","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

Nanoblocks-enhanced tunable plasmonic sensor based on MIM waveguide with double independent resonators

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-24 DOI: 10.1016/j.optcom.2025.131798

Yongpeng Ren, Fumeng Qin, Desheng Qu, Yiping Sun, Chunlei Li

{"title":"Nanoblocks-enhanced tunable plasmonic sensor based on MIM waveguide with double independent resonators","authors":"Yongpeng Ren, Fumeng Qin, Desheng Qu, Yiping Sun, Chunlei Li","doi":"10.1016/j.optcom.2025.131798","DOIUrl":"10.1016/j.optcom.2025.131798","url":null,"abstract":"<div><div>A compact plasmonic sensor structure with silver nanoblocks enhancement is presented. The standard structure is based on the metal-insulator-metal (MIM) waveguide with a silver baffle, an elliptic ring cross cavity and a square frame cavity with a gap. The transmission characteristics of the structure are analyzed by the finite element method. The simulation results show that the structure generates triple Fano resonances. By changing the structural parameters of cavities, there is a good linear relationship between resonance wavelength and the effective length of resonator. Furthermore, the Fano resonances produced by various resonators can be tuned independently by the refractive index of the medium. The standard structure can achieve a sensitivity of 2760 nm/refractive index unit (RIU). By adding silver nanoblocks to the standard structure, the sensitivity of the modified structure reaches 3090 nm/RIU, which is 11.95 % higher than before. In addition, based on the independence of the resonator, the designed structure can realize the simultaneous detection of glucose solution and glycerol. The concentration sensitivities reach 388.7 nm∗ml/g and 403.3 nm∗ml/g, respectively.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131798"},"PeriodicalIF":2.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697780","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

Experimental verification of multi-dimensional geometric shaping in OFDM-VLC system

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-23 DOI: 10.1016/j.optcom.2025.131792

Ruoling Song , Jie Ma , Jia Lu , Jianfei Liu , Xiangye Zeng , Mingming Luo

{"title":"Experimental verification of multi-dimensional geometric shaping in OFDM-VLC system","authors":"Ruoling Song , Jie Ma , Jia Lu , Jianfei Liu , Xiangye Zeng , Mingming Luo","doi":"10.1016/j.optcom.2025.131792","DOIUrl":"10.1016/j.optcom.2025.131792","url":null,"abstract":"<div><div>In this paper, an innovative four-dimensional set-partitioning geometric shaping (4D-SP-GS) modulation format is proposed and experimentally verified in orthogonal frequency division multiplexing based visible light communication (OFDM-VLC). The method optimizes the position of the constellation points by using the quasi-polarization multiplexing. The perfect combination of SP and polarization ring switching (PRS) achieves flexible grouping and ring switching between constellation points, and further expand the minimum Euclidean distance (MED) of constellation points. Orthant symmetry (OS) reduces the complexity of constellation point mapping in 4D space. The entropy of the 4D-SP-GS can reach 8 bit/symbol. The simple real-valued precoding decreases the peak-to-average power ratio (PAPR) of OFDM and equalizes signal-to-noise ratio (SNR) distribution among subcarriers. Compared with traditional polarization-multiplexed 16 quadrature amplitude modulation (PM-16QAM), 4D geometric shell mapping (4D-GSS), 4D circular 256QAM (4D-c256QAM) and 4D-256PRS, experimental results show that the 4D-SP-GS can achieve a maximum operating range improvement of 50/45/30/8 mV when volts-peak-to-peak (VPP) is 60 mV–110 mV and 130/75/50/25 MS/s sampling rate improvement when the bit error rate (BER) satisfies 3.8 × 10<sup>−3</sup>, thus effectively improve the anti-nonlinearity performance of the system.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131792"},"PeriodicalIF":2.2,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697776","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

Polarization independent metal–insulator–metal layered wide-band absorber with large angular stability for radar cross section reduction application

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-23 DOI: 10.1016/j.optcom.2025.131751

Sivanantham Arumugam, Srinivasa Rao Inabathini

{"title":"Polarization independent metal–insulator–metal layered wide-band absorber with large angular stability for radar cross section reduction application","authors":"Sivanantham Arumugam, Srinivasa Rao Inabathini","doi":"10.1016/j.optcom.2025.131751","DOIUrl":"10.1016/j.optcom.2025.131751","url":null,"abstract":"<div><div>A wide-band polarization independent microwave absorber has been proposed using two cross dipole resonators and square nodes with an unit cell size of <span><math><mrow><mn>0</mn><mo>.</mo><mn>18</mn><msub><mrow><mi>λ</mi></mrow><mrow><mi>L</mi></mrow></msub><mo>×</mo><mn>0</mn><mo>.</mo><mn>18</mn><msub><mrow><mi>λ</mi></mrow><mrow><mi>L</mi></mrow></msub></mrow></math></span>, where <span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>L</mi></mrow></msub></math></span> represents the wavelength at the lowest operating frequency. The cross-dipole based resonating patterns with four nodes are designed on the FR4 dielectric layer. Lumped resistors are employed on the top layer to achieve the wide bandwidth. The bottom-most layer of the proposed absorber structure is made of copper. An air-spacer layer has been deployed between the substrate and the metallic ground layer to extend the low frequency absorption. The fractional bandwidth of the absorber is 93% with the absorption greater than 90% in the operating frequency range of 2.76 GHz-7.56 GHz. The profile of the proposed absorber is 0.08<span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>L</mi></mrow></msub></math></span>. The unique characteristic of the proposed absorber structure is that the polarization conversion ratio of the structure is less than 0.1. The absorptivity of the proposed structure is more than 80% for a wide range of incident angles up to 60°. The absorption characteristics are found to be stable for both transverse electric and transverse magnetic polarized incident waves under normal incidence. Further, the mono-static radar cross section reduction of the proposed absorber structure has been verified to be greater than 20 <span><math><mrow><mtext>dB</mtext><mspace></mspace><mtext>m</mtext><msup><mrow></mrow><mrow><mi>2</mi></mrow></msup></mrow></math></span> in the operating bandwidth.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131751"},"PeriodicalIF":2.2,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682147","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

Wideband continuously-tuned matrix DFB laser array assisted with enhanced self-heating effect based on REC technique

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-23 DOI: 10.1016/j.optcom.2025.131759

Zizhuo Li , Yaqiang Fan , Zhenxing Sun , Wentao Sun , Yuan Lv , Wei Yuan , Zijiang Yang , Jiale Xu , Pan Dai , Yan Wang , Pengfei Xu , Xiangfei Chen

{"title":"Wideband continuously-tuned matrix DFB laser array assisted with enhanced self-heating effect based on REC technique","authors":"Zizhuo Li , Yaqiang Fan , Zhenxing Sun , Wentao Sun , Yuan Lv , Wei Yuan , Zijiang Yang , Jiale Xu , Pan Dai , Yan Wang , Pengfei Xu , Xiangfei Chen","doi":"10.1016/j.optcom.2025.131759","DOIUrl":"10.1016/j.optcom.2025.131759","url":null,"abstract":"<div><div>In this letter, we propose and experimentally demonstrate a wideband continuously-tuned matrix distributed feedback (DFB) laser array. This DFB laser array is developed based on the reconstruction-equivalent-chirp (REC) technique and has an enhanced self-heating effect. The laser array is made up of 24 DFB lasers that are arranged in an 8 × 3 matrix interleaving pattern. Moreover, it integrates a three-level cascaded Y-branch optical combiners and an active semiconductor optical amplifier (SOA) on a single chip. In order to achieve continuous wavelength tuning, we increase the resistance of the laser to enhance the self-heating effect of the laser, which in turn expands the current-tuned wavelength range of the laser. The tunable 8 × 3 REC-DFB laser array employs a current tuning method. Consequently, in comparison with the conventional wavelength tuning methods relying on thermoelectric cooler (TEC), it can reach lower power consumption and faster continuous wavelength tuning. The proposed laser array is applicable to a 49 nm continuous wavelength tuning situation. Its output power is more than 38 mW, and all side mode suppression ratios (SMSRs) are higher than 40 dB. This research provides a new path for realizing semiconductor lasers with low power consumption and a wide tuning range.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131759"},"PeriodicalIF":2.2,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682085","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