Optics Communications最新文献

{"title":"Propagation dynamics of a controllable auto-focusing annular Tricomi-Gaussian beam array","authors":"Zhiwei Mi,&nbsp;Zihan Zhao,&nbsp;Ruojun Wei,&nbsp;Benyi Wang,&nbsp;Liping Zhang,&nbsp;Zhongsheng Man,&nbsp;Xiaolu Ge","doi":"10.1016/j.optcom.2025.132104","DOIUrl":"10.1016/j.optcom.2025.132104","url":null,"abstract":"<div><div>A new type of controllable auto-focusing beam array named annular Tricomi-Gaussian beam array (ATGBA) is introduced. The auto-focusing ability of ATGBA can be manipulated by the number of beamlets <em>N</em>, the complex constants <em>α</em> and <em>β</em> of beam parameters. The focusing position or the focal length of ATGBA can be controlled by the transverse displacement parameter <em>d</em> and the beamlet order <em>l</em> of Tricomi-Gaussian beam (TGB). Interestingly, enhancing auto-focusing ability and extending focal length for an ATGBA can be simultaneously realized by selecting lower beam order <em>l</em> of TGB. The auto-focusing ability of ATGBA is about 4 times of auto-focusing Bessel-Gaussian beam (ABGB) under the same condition. In addition, the Poynting vector and the OAM density of ATGBA are provided.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132104"},"PeriodicalIF":2.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270887","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}

{"title":"Enhanced second harmonic generation in hybrid MoS2/Au/MoS2 and MoS2/SiO2/MoS2 Langmuir-Blodgett films","authors":"Cédric Lambin ,&nbsp;Wensen Wang ,&nbsp;Gilles Pécastaings ,&nbsp;Damien Voiry ,&nbsp;Serge Ravaine ,&nbsp;François Lagugné-Labarthet","doi":"10.1016/j.optcom.2025.132100","DOIUrl":"10.1016/j.optcom.2025.132100","url":null,"abstract":"<div><div>Transition metal dichalcogenides have gained much attention due to their semiconducting properties, enabling a wealth of applications that integrate these 2D materials. Optical properties such as luminescence and nonlinear optical properties are of particular interest for photonic applications despite the small surface of the individual exfoliated flakes or the inherent difficulty to mechanically transfer flakes grown by CVD onto a given substrate. Herein, we investigate the Langmuir-Blodgett transfer of exfoliated MoS₂ flakes deposited onto glass coverslips. Intercalation of Au and SiO₂ nanoparticles between 2 layers of MoS₂ was conducted using successive LB deposition, enabling the formation of heterostructures films with conductor and dielectric materials. The properties of these films were investigated using Raman spectroscopy and second harmonic generation (SHG) microscopy. The multilayers films are transferred on ∼ cm² surface area with good coverage but with uncontrolled crystalline orientation of the MoS₂ flakes. Raman enhancement of MoS₂ was evidenced when Au nanoparticles are intercalated between two layers of MoS₂. Polarized SHG microscopy shows a transition from quadrupolar response of the MoS₂ flake driven by their D_3h symmetry to a dipolar polarized response driven by the Au nanoparticles.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132100"},"PeriodicalIF":2.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270914","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}

{"title":"Highly sensitive lossy mode resonance sensor based on perovskite-coated D-shaped fiber","authors":"Leilei Ma ,&nbsp;Ying He ,&nbsp;Run Xu ,&nbsp;Yanfang Yang ,&nbsp;Feng Hong ,&nbsp;Yan Zhu","doi":"10.1016/j.optcom.2025.132031","DOIUrl":"10.1016/j.optcom.2025.132031","url":null,"abstract":"<div><div>We propose a D-shaped optical fiber sensor with the perovskite coating excited by lossy mode resonance (LMR). MAPbI₃ is a promising candidate for perovskite fiber sensors. LMRs produced by MAPbI₃ coating are demonstrated by the transmission spectra in the near infrared wavelength. The sensor can detect a wide range of surrounding refractive indices from 1 to 1.448, and the loss spectra of Y-polarization and X-polarization modes can be clearly distinguished. The position of the resonance peak can be adjusted by varying the film thickness to regulate the detection range and improve detection accuracy. The resonance width is reduced by adjusting the residual cladding thickness due to the light coupling at LMRs transmitted through the D-shaped optical fiber core to the perovskite coating. The maximum sensitivity reaches up to 35,000 nm/RIU and the maximum figure of merit is 925.68 RIU⁻¹ in the perovskite fiber sensor. Compared with D-shaped optical fiber sensors with conventional materials, the proposed sensor with perovskite coating shows superior sensing performance. Perovskite-based LMR sensing is a productive way to contribute to resonance optical fiber sensing technology and may make a breakthrough in the development of miniaturization, high detection accuracy and multi-target detection.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132031"},"PeriodicalIF":2.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270913","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}

{"title":"Scattering properties of multilayer chiral particles by Hermite-Gaussian beams","authors":"Jing Bai ,&nbsp;Cheng-Xian Ge ,&nbsp;Tan Qu ,&nbsp;Zheng-Jun Li ,&nbsp;Qing-Chao Shang ,&nbsp;Wen-Hao Ma ,&nbsp;Zhen-Sen Wu","doi":"10.1016/j.optcom.2025.132092","DOIUrl":"10.1016/j.optcom.2025.132092","url":null,"abstract":"<div><div>This study, based on the Generalized Lorenz-Mie Theory (GLMT), focuses on the scattering trait of multilayer chiral spherical particles in the presence of high-order Hermite-Gaussian beam (HGB). The spherical vector wave functions (SVWFs) of high-order HGBs were derived using the complex source point method and extended to arbitrary directions through the coordinate rotation theorem. By substituting the beam expressions into the electromagnetic field boundary continuity conditions and combining them with the iterative relationships of multilayer sphere, the scattering coefficients for each region of the multilayer sphere were calculated. To verify the accuracy of the algorithm and theoretical framework, we simplified the beam and particle models and compared the results with those in existing literature. The study thoroughly examined the effects of various factors, including beam order, incidence angle, particle chirality, waist radius, polarization angle, and number of layers, on the near-field, internal-field, and far-field scattering results. These research findings provide significant theoretical and experimental guidance for the identification and manipulation of multilayer biological particle structures.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132092"},"PeriodicalIF":2.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279558","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}

{"title":"Electro-optically cavity-dumped Ho:YAG laser with wavelengths switching between 2090nm and 2122nm","authors":"Na Chen ,&nbsp;Zhen-Ling Li ,&nbsp;Jing-Ya Zhang ,&nbsp;Ao-Nan Zhang ,&nbsp;Ke Liu ,&nbsp;Yang Kou ,&nbsp;Xiao-Jun Wang","doi":"10.1016/j.optcom.2025.132095","DOIUrl":"10.1016/j.optcom.2025.132095","url":null,"abstract":"<div><div>A wavelength switchable cavity dumped nanosecond (ns) Ho:YAG laser is demonstrated. A rubidium titanyl phosphate (RTP) electro-optic cell is combined with a thin film polarizer (TFP) for cavity dumping operating at 10 kHz repetition rate. By finely rotating the TFP, the intracavity loss for different wavelength peak around 2.1 μm is accurately controlled, and the laser can be selectively operated at 2090.31 nm and 2122.41 nm, respectively. The output characteristics are almost similar for both of the two wavelengths. The pulse width is kept at approximately 4.5 ns. When the incident pump power is 21.8 W, the maximum average output power of 7.3 W is achieved, corresponding to a maximum pulse energy of 0.73 mJ.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132095"},"PeriodicalIF":2.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254899","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}

{"title":"DNASM -TID: Atmospheric scattering model construction based on light source distance and image dehazing for nighttime traffic scenes","authors":"Xingang Wang ,&nbsp;Junwei Tian ,&nbsp;Yalin Yu ,&nbsp;Qin Wang ,&nbsp;Yupeng Feng ,&nbsp;Haokai Gao ,&nbsp;Irene Korkor Nyengor Agbenu ,&nbsp;Shifan Yu","doi":"10.1016/j.optcom.2025.132093","DOIUrl":"10.1016/j.optcom.2025.132093","url":null,"abstract":"<div><div>Nighttime traffic scene image dehazing has an important application value for nighttime traffic driving and security monitoring activities. Aiming at the existing nighttime image dehazing optical model for the non-uniform distribution of artificial light sources is not enough to consider the problems of halo and uneven illumination in the dehazed image. A nighttime image imaging atmospheric scattering model based on the distance of the light source is constructed. An image dehazing algorithm for nighttime traffic scenes is proposed based on the constructed optical model. Firstly, the near light source region in the foggy image at nighttime is segmented based on Gaussian pyramid, and in order to deal with the scattering effect of artificial light source more accurately, a discriminative index for the proximity of scene pixels to the center of the light source is proposed. Then, the atmospheric light matrix conforming to the regional distribution of light sources is estimated using Gaussian low-pass filtering, and to obtain a more accurate atmospheric light matrix, a channel map is constructed as a guided map by utilizing the luminance and saturation components of the image, and fast guided filtering is carried out on the preliminarily obtained atmospheric light matrix. Subsequently, the transmittance matrices of the near-source and far-source regions are solved using the bright and dark channel a priori, respectively. The optimal fusion model with <em>L</em>₂ norm regularization is established to solve the fused transmittance matrix. To avoid the block partition effect in the process of transmittance fusion, anisotropic Gaussian filtering is carried out on the fused transmittance matrix. Finally, a dark-adaptive adjustment function is designed to adaptively adjust the image's brightness level after dehazing. The experimental results show that the proposed nighttime traffic scene image dehazing algorithm dehazes the image after the subjective visual effect of dehazing more thoroughly, at the same time, effectively mitigates the problem of uneven halo and luminance distribution. Compared with other nighttime image dehazing algorithms, it shows substantial superiority in subjective and objective evaluation experiments.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132093"},"PeriodicalIF":2.2,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241210","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}

{"title":"Propagation of modified anomalous vortex beams in a gradient-index medium","authors":"Bikash K. Das ,&nbsp;Camilo Granados ,&nbsp;Marcelo F. Ciappina","doi":"10.1016/j.optcom.2025.132030","DOIUrl":"10.1016/j.optcom.2025.132030","url":null,"abstract":"<div><div>Modified anomalous vortex (MAV) beams are orbital angular momentum (OAM)-carrying light beams with controlled self-focusing properties. We investigate the propagation of MAV beams in a gradient-index (GRIN) medium. Based on the Huygens-Fresnel integral and ABCD matrix, we derive an analytical expression for the complex amplitude of the MAV beam propagating in a GRIN medium. The effects of the topological charge (TC), the order of the vortex beam, the modification parameter, the gradient-index parameter, and the refractive index of the medium axis on the intensity distributions of the MAV beam are numerically studied. The propagation trajectory and intensity distributions are shown to change periodically in the GRIN medium with increasing propagation distances. The gradient index parameter also determines the periodic values of the MAV beams during propagation, and the period of evolution decreases as the value of the gradient index parameter increases. Moreover, the refractive index at the symmetry axis has little effect on the focusing intensity of the MAV beam and does not influence the maximum radius of the bright ring as the beam propagates through the GRIN medium. The results presented in this paper may be useful for applications of MAV beams in optical guiding, optical communication, and laser optics.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132030"},"PeriodicalIF":2.2,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255389","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}

{"title":"Simultaneous detection of refractive index and sound velocity in liquid solvents using topological interface states in phoxonic crystal waveguides","authors":"Yuankun Ji,&nbsp;Yiming Song,&nbsp;Tianren Lin,&nbsp;Tian-Xue Ma","doi":"10.1016/j.optcom.2025.132026","DOIUrl":"10.1016/j.optcom.2025.132026","url":null,"abstract":"<div><div>Topologically protected boundary states in artificially photonic and phononic materials offer a promising platform for the design of robust wave devices due to their inherent immunity to structural perturbations. In this study, we propose phoxonic crystal (PxC) waveguides for simultaneous guidance of electromagnetic and acoustic waves, and numerically investigate their wave characteristics using finite element analysis. It is demonstrated that both the topologically trivial and non-trivial phases could be realized by varying the PxC waveguides’ geometric parameters, enabling the creation of PxC structures supporting the zero-dimensional topological interface states (TISs) for both electromagnetic and acoustic waves. The developed TISs are subsequently applied for the detection of refractive index and sound velocity of water/1-propanol mixtures with different concentrations. Notably, the sensing performance of the topological PxC waveguides maintain remarkable stability against intentionally introduced structural perturbations.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132026"},"PeriodicalIF":2.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241212","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}

{"title":"Optimal control of redshift of high-order harmonic in two-color laser fields","authors":"Guang-Rui Jia,&nbsp;Hui-Xia Kang,&nbsp;Ze-Hui Liu","doi":"10.1016/j.optcom.2025.132069","DOIUrl":"10.1016/j.optcom.2025.132069","url":null,"abstract":"<div><div>High-order harmonic generation (HHG) from the polar diatomic molecule HeH²⁺ is investigated by time-dependent Schrödinger equation (TDSE) in the few-cycle two-color laser (TCL) fields. The impact of the phase difference and inhomogeneity of the TCL fields on HHG was elucidated in this paper. The phase difference affects the rising and falling part and the asymmetry of the TCL field to modulate the occurrence of non-adiabatic redshift. The redshift variations with a period of π as the phase difference changes and the redshift amplitude is the largest when the phase difference is 0.5π. The phase difference also affects the recombination of electrons with adjacent ions, the maximum kinetic energies change increases with the increase of phase difference that can make the high-order harmonic spectrum broaden. The inhomogeneity modifies the laser field distribution, inducing observable modulations in the redshift magnitude of high-order harmonics. Crucially, with a fixed phase difference, controlled enhancement of the inhomogeneity within an optimal range significantly amplifies the redshift. We can optimize of redshift tuning in HHG by these adjustments above.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132069"},"PeriodicalIF":2.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263686","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}

{"title":"Ultrafast-pumped temperature response in in-line cascaded quasi-phase-matching optical second harmonic","authors":"Yuhang He ,&nbsp;Dan Yu ,&nbsp;Yan Li ,&nbsp;Hongpeng Liu ,&nbsp;Weiji He ,&nbsp;Qian Chen","doi":"10.1016/j.optcom.2025.132088","DOIUrl":"10.1016/j.optcom.2025.132088","url":null,"abstract":"<div><div>We have proposed and experimentally demonstrated a bus temperature sensor array based on nonlinear optics second harmonic generation (SHG) in periodically poled lithium niobate (PPLN) and wavelength coded with poling period. The temperature response on bulk PPLN is studied by interrogating SHG spectra. Group dispersion factor and efficient thermal-birefringence between fundamental wave and second harmonic wave are proposed to describe peak wavelength shift. Single temperature sensor capitalizing on mode-locked laser provides 0.11 nm/°C sensitivity, 80 °C dynamic range around room temperature, and 2 °C temperature resolution. Additionally, a wavelength-coded 1 × 4 sensor array is demonstrated via quasi-comb spectra induced by poling period engineering. Each sensing unit has a unique poling period and SHG peak wavelength which can shift independently, and the temporal-evolved joint spectra of two non-cooperative targets confirm the practicability. The arrayed temperature sensors validate great applying potential on photonic integrated circuits (PIC).</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132088"},"PeriodicalIF":2.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279557","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}