物理与天体物理最新文献

{"title":"Extracting the Speed of Sound in Heavy-Ion Collisions: A Study of Quantum-Initiated Fluctuations and Thermalization","authors":"Yu-Shan Mu, Jing-An Sun, Li Yan, Xu-Guang Huang","doi":"10.1103/skhj-cj9p","DOIUrl":"https://doi.org/10.1103/skhj-cj9p","url":null,"abstract":"","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"13 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Lindbladian Simulation with Logarithmic Precision Scaling via Two Ancillas","authors":"Wenjun Yu, Xiaogang Li, Qi Zhao, Xiao Yuan","doi":"10.1103/2cx4-b82c","DOIUrl":"https://doi.org/10.1103/2cx4-b82c","url":null,"abstract":"","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"215 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"The Effect of Pressure and Annealing in Liquid Zn on the Transmission Spectra of ZnSe:Fe2+ Crystals for Radiation in the Visible and Near-IR Spectral Region","authors":"M. I. Studenikin,&nbsp;S. A. Mironov,&nbsp;O. V. Uvarov,&nbsp;V. P. Kalinushkin,&nbsp;G. A. Bufetova,&nbsp;N. N. Il’ichev,&nbsp;E. S. Gulyamova,&nbsp;V. P. Tumorin","doi":"10.3103/S1068335625601955","DOIUrl":"10.3103/S1068335625601955","url":null,"abstract":"<p>A change was found in the characteristics of a ZnSe:Fe²⁺ sample subjected to external pressure and a magnetic field at room temperature. It is demonstrated that long (2 years) exposure to pressure and a magnetic field alters the transmission spectrum and luminescent characteristics in the range of 450 to 700 nm. The results of measuring the transmission spectra of the ZnSe:Fe²⁺ sample before and after the annealing process in liquid Zn are presented. It is shown that the changes in transmission spectra caused by pressure and a magnetic field and changes in transmission spectra after annealing the sample in liquid Zn are similar, although not identical.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 9","pages":"431 - 437"},"PeriodicalIF":0.7,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145296791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Costs of Bayesian parameter estimation in third-generation gravitational wave detectors: An assessment of current acceleration methods","authors":"Qian Hu, John Veitch","doi":"10.1103/dj7k-tk37","DOIUrl":"https://doi.org/10.1103/dj7k-tk37","url":null,"abstract":"Bayesian inference with stochastic sampling has been widely used to obtain the properties of gravitational wave (GW) sources. Although computationally intensive, its cost remains manageable for current second-generation GW detectors because of the relatively low event rate and signal-to-noise ratio (SNR). The third-generation (3G) GW detectors are expected to detect hundreds of thousands of compact binary coalescence (CBC) events every year with substantially higher SNR and longer signal duration, presenting significant computational challenges. In this study, we systematically evaluate the computational costs of CBC source parameter estimation (PE) in the 3G era by modeling the PE time cost as a function of SNR and signal duration. We examine the standard PE method alongside acceleration methods including relative binning, multibanding, and reduced order quadrature. We predict that PE for a one-month-observation catalog with 3G detectors could require at least billions of CPU core hours with the standard PE method, whereas acceleration techniques can reduce this demand to less than millions of core hours, which is as high as the cost of analyzing GW events in the past 10 years. These findings highlight the necessity for more efficient PE methods to enable cost-effective and environmentally sustainable data analysis for 3G detectors. In addition, we assess the accuracy of accelerated PE methods, emphasizing the need for careful treatment in high-SNR scenarios.","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"13 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Color-magnetic correlations in SU(2) and SU(3) lattice QCD","authors":"Atsuya Tokutake, Kei Tohme, Hideo Suganuma","doi":"10.1103/1n8n-xlnp","DOIUrl":"https://doi.org/10.1103/1n8n-xlnp","url":null,"abstract":"We study the two-point field-strength correlation g&lt;/a:mi&gt;2&lt;/a:mn&gt;&lt;/a:msup&gt;⟨&lt;/a:mo&gt;G&lt;/a:mi&gt;μ&lt;/a:mi&gt;ν&lt;/a:mi&gt;&lt;/a:mrow&gt;a&lt;/a:mi&gt;&lt;/a:msubsup&gt;(&lt;/a:mo&gt;s&lt;/a:mi&gt;)&lt;/a:mo&gt;G&lt;/a:mi&gt;α&lt;/a:mi&gt;β&lt;/a:mi&gt;&lt;/a:mrow&gt;b&lt;/a:mi&gt;&lt;/a:msubsup&gt;(&lt;/a:mo&gt;s&lt;/a:mi&gt;′&lt;/a:mo&gt;&lt;/a:msup&gt;)&lt;/a:mo&gt;⟩&lt;/a:mo&gt;&lt;/a:math&gt; in the Landau gauge in SU(2) and SU(3) quenched lattice QCD, as well as the gluon propagator &lt;i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;i:msup&gt;&lt;i:mi&gt;g&lt;/i:mi&gt;&lt;i:mn&gt;2&lt;/i:mn&gt;&lt;/i:msup&gt;&lt;i:mo stretchy=\"false\"&gt;⟨&lt;/i:mo&gt;&lt;i:msubsup&gt;&lt;i:mi&gt;A&lt;/i:mi&gt;&lt;i:mi&gt;μ&lt;/i:mi&gt;&lt;i:mi&gt;a&lt;/i:mi&gt;&lt;/i:msubsup&gt;&lt;i:mo stretchy=\"false\"&gt;(&lt;/i:mo&gt;&lt;i:mi&gt;s&lt;/i:mi&gt;&lt;i:mo stretchy=\"false\"&gt;)&lt;/i:mo&gt;&lt;i:msubsup&gt;&lt;i:mi&gt;A&lt;/i:mi&gt;&lt;i:mi&gt;ν&lt;/i:mi&gt;&lt;i:mi&gt;b&lt;/i:mi&gt;&lt;/i:msubsup&gt;&lt;i:mo stretchy=\"false\"&gt;(&lt;/i:mo&gt;&lt;i:msup&gt;&lt;i:mi&gt;s&lt;/i:mi&gt;&lt;i:mo&gt;′&lt;/i:mo&gt;&lt;/i:msup&gt;&lt;i:mo stretchy=\"false\"&gt;)&lt;/i:mo&gt;&lt;i:mo stretchy=\"false\"&gt;⟩&lt;/i:mo&gt;&lt;/i:math&gt;. The Landau-gauge gluon propagator &lt;q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;q:msup&gt;&lt;q:mi&gt;g&lt;/q:mi&gt;&lt;q:mn&gt;2&lt;/q:mn&gt;&lt;/q:msup&gt;&lt;q:mo stretchy=\"false\"&gt;⟨&lt;/q:mo&gt;&lt;q:msubsup&gt;&lt;q:mi&gt;A&lt;/q:mi&gt;&lt;q:mi&gt;μ&lt;/q:mi&gt;&lt;q:mi&gt;a&lt;/q:mi&gt;&lt;/q:msubsup&gt;&lt;q:mo stretchy=\"false\"&gt;(&lt;/q:mo&gt;&lt;q:mi&gt;s&lt;/q:mi&gt;&lt;q:mo stretchy=\"false\"&gt;)&lt;/q:mo&gt;&lt;q:msubsup&gt;&lt;q:mi&gt;A&lt;/q:mi&gt;&lt;q:mi&gt;μ&lt;/q:mi&gt;&lt;q:mi&gt;a&lt;/q:mi&gt;&lt;/q:msubsup&gt;&lt;q:mo stretchy=\"false\"&gt;(&lt;/q:mo&gt;&lt;q:msup&gt;&lt;q:mi&gt;s&lt;/q:mi&gt;&lt;q:mo&gt;′&lt;/q:mo&gt;&lt;/q:msup&gt;&lt;q:mo stretchy=\"false\"&gt;)&lt;/q:mo&gt;&lt;q:mo stretchy=\"false\"&gt;⟩&lt;/q:mo&gt;&lt;/q:math&gt; is well described by the Yukawa-type function &lt;y:math xmlns:y=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;y:msup&gt;&lt;y:mi&gt;e&lt;/y:mi&gt;&lt;y:mrow&gt;&lt;y:mo&gt;−&lt;/y:mo&gt;&lt;y:mi&gt;m&lt;/y:mi&gt;&lt;y:mi&gt;r&lt;/y:mi&gt;&lt;/y:mrow&gt;&lt;/y:msup&gt;&lt;y:mo&gt;/&lt;/y:mo&gt;&lt;y:mi&gt;r&lt;/y:mi&gt;&lt;/y:math&gt; with r&lt;/ab:mi&gt;≡&lt;/ab:mo&gt;|&lt;/ab:mo&gt;s&lt;/ab:mi&gt;−&lt;/ab:mo&gt;s&lt;/ab:mi&gt;′&lt;/ab:mo&gt;&lt;/ab:msup&gt;|&lt;/ab:mo&gt;&lt;/ab:math&gt; for &lt;eb:math xmlns:eb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;eb:mi&gt;r&lt;/eb:mi&gt;&lt;eb:mo&gt;=&lt;/eb:mo&gt;&lt;eb:mn&gt;0.1&lt;/eb:mn&gt;&lt;eb:mi&gt;–&lt;/eb:mi&gt;&lt;eb:mn&gt;1.0&lt;/eb:mn&gt;&lt;eb:mtext&gt; &lt;/eb:mtext&gt;&lt;eb:mtext&gt; &lt;/eb:mtext&gt;&lt;eb:mi&gt;fm&lt;/eb:mi&gt;&lt;/eb:math&gt; in both SU(2) and SU(3) QCD. Next, motivated by color-magnetic instabilities in the QCD vacuum, we investigate the perpendicular-type color-magnetic correlation, &lt;gb:math xmlns:gb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;gb:mrow&gt;&lt;gb:msub&gt;&lt;gb:mrow&gt;&lt;gb:mi&gt;C&lt;/gb:mi&gt;&lt;/gb:mrow&gt;&lt;gb:mrow&gt;&lt;gb:mo&gt;⊥&lt;/gb:mo&gt;&lt;/gb:mrow&gt;&lt;/gb:msub&gt;&lt;gb:mo stretchy=\"false\"&gt;(&lt;/gb:mo&gt;&lt;gb:mi&gt;r&lt;/gb:mi&gt;&lt;gb:mo stretchy=\"false\"&gt;)&lt;/gb:mo&gt;&lt;gb:mo&gt;≡&lt;/gb:mo&gt;&lt;gb:msup&gt;&lt;gb:mrow&gt;&lt;gb:mi&gt;g&lt;/gb:mi&gt;&lt;/gb:mrow&gt;&lt;gb:mrow&gt;&lt;gb:mn&gt;2&lt;/gb:mn&gt;&lt;/gb:mrow&gt;&lt;/gb:msup&gt;&lt;gb:mo stretchy=\"false\"&gt;⟨&lt;/gb:mo&gt;&lt;gb:msubsup&gt;&lt;gb:mrow&gt;&lt;gb:mi&gt;H&lt;/gb:mi&gt;&lt;/gb:mrow&gt;&lt;gb:mrow&gt;&lt;gb:mi&gt;z&lt;/gb:mi&gt;&lt;/gb:mrow&gt;&lt;gb:mrow&gt;&lt;gb:mi&gt;a&lt;/gb:mi&gt;&lt;/gb:mrow&gt;&lt;/gb:msubsup&gt;&lt;gb:mo stretchy=\"false\"&gt;(&lt;/gb:mo&gt;&lt;gb:mi&gt;s&lt;/gb:mi&gt;&lt;gb:mo stretchy=\"false\"&gt;)&lt;/gb:mo&gt;&lt;gb:msubsup&gt;&lt;gb:mrow&gt;&lt;gb:mi&gt;H&lt;/gb:mi&gt;&lt;/gb:mrow&gt;&lt;gb:mrow&gt;&lt;gb:mi&gt;z&lt;/gb:mi&gt;&lt;/gb:mrow&gt;&lt;gb:mrow&gt;&lt;gb:mi&gt;a&lt;/gb:mi&gt;&lt;/gb:mrow&gt;&lt;/gb:msubsup&gt;&lt;gb:mo stretchy=\"false\"&gt;(&lt;/gb:mo&gt;&lt;gb:mi&gt;s&lt;/gb:mi&gt;&lt;gb:mo&gt;+&lt;/gb:mo&gt;&lt;gb:mi&gt;r&lt;/gb:mi&gt;&lt;gb:mover accent=\"true\"&gt;&lt;gb:mrow&gt;&lt;gb:mo&gt;⊥&lt;/gb:mo&gt;&lt;/","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"40 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Synergetic full-parametric Aharonov–Anandan and Pancharatnam–Berry phase for arbitrary polarization and wavefront control","authors":"Tong Liu, Yanzhao Wang, Weike Feng, Huiling Luo, ZhengJie Wang, Hui Wang, He-Xiu Xu, Xiangang Luo","doi":"10.1515/nanoph-2025-0357","DOIUrl":"https://doi.org/10.1515/nanoph-2025-0357","url":null,"abstract":"Electromagnetic devices with multiple polarization modes are urgently needed in remote sensing detection and radar imaging due to their ability to obtain scattering information from targets through manipulation of full-parametric Jones matrix components (<jats:italic>J</jats:italic> <jats:sub> <jats:italic>xx</jats:italic> </jats:sub>, <jats:italic>J</jats:italic> <jats:sub> <jats:italic>xy</jats:italic> </jats:sub>, <jats:italic>J</jats:italic> <jats:sub> <jats:italic>yx</jats:italic> </jats:sub>, <jats:italic>J</jats:italic> <jats:sub> <jats:italic>yy</jats:italic> </jats:sub>). Although metasurfaces exhibit exceptional capability for polarization control, they typically facilitate conversion between specific linearly polarized (LP) and circularly polarized waves on Poincaré sphere. Here, we find that identical phases in two co-polarized components is exactly half of the sum of phases in two cross-polarized components by deriving Jones matrix <jats:italic>J</jats:italic> <jats:sub>AAL</jats:sub> with full-parametric Aharonov–Anandan (AA) phase Jones matrix. On this basis, a novel spin-decoupled paradigm is proposed by merging of AA phase and Pancharatnam–Berry (PB) phase mechanisms. Such a paradigm in diatomic metasurface is promised to achieve elegant amplitude-phase controlling and generate arbitrary polarized waves. For verification, two types of meta-devices were designed, fabricated, and experimentally characterized. Compared to the combination of propagation and PB phase, the proposed method enables simultaneous broadband arbitrary LP-to-LP conversion and wavefront control with a relative bandwidth of 43.5 %. Our strategy establishes theoretical foundation for spin-decoupled phase manipulation and amplitude-phase control of AA phase, providing a solid platform and guidance for the design of devices with arbitrary polarization and wavefront control.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"38 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"One-sided composite cavity on an optical nanocapillary fiber.","authors":"Srinu Gadde, Jelba John, Ramachandrarao Yalla","doi":"10.1364/OL.575690","DOIUrl":"https://doi.org/10.1364/OL.575690","url":null,"abstract":"<p><p>We report on a numerical study of a one-sided cavity on an optical nanocapillary fiber (NCF) using a composite cavity. The composite cavity is formed by combining an optical NCF and an asymmetric defect mode grating. We design the cavity to realize the maximum channeling efficiency of up to ∼80<i>%</i> into one-sided NCF-guided modes while operating from under- to critical- and over-coupling regimes. For the maximum channeling efficiency case, we find the best performance parameters, such as quality factor, finesse, and one-pass loss of the cavity. The present platform may open a novel, to the best of our knowledge, route for designing fiber-based deterministic single-photon sources in quantum technologies.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 20","pages":"6273-6276"},"PeriodicalIF":3.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145302403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Physics-embedded neural state-space module for single-shot lens-free on-chip microscopy.","authors":"Pengcheng Jia, Sida Gao, Ziyang Li, Zhengyu Wu, Guancheng Huang, Yao Wu, Yutong Li, Shutian Liu, Jinghan Li, Zhengjun Liu","doi":"10.1364/OL.571248","DOIUrl":"https://doi.org/10.1364/OL.571248","url":null,"abstract":"<p><p>Lens-free on-chip microscopy (LFOCM) enables large-field-of-view, high-throughput quantitative imaging by capturing diffraction holograms directly at the sensor plane, eliminating the need for bulky optics and mechanical scanning. Conventional reconstruction pipelines, however, suffer from inherent noise amplification due to their primary reliance on physics-based priors. To overcome this limitation, we developed a physics-embedded neural state-space framework that incorporates diffraction physics for single-shot LFOCM reconstruction. This physics-constrained approach integrates a dual-branch architecture that combines local inductive bias with global modeling, enabling unsupervised recovery of high-fidelity quantitative amplitude and phase distributions. Comprehensive validation demonstrates state-of-the-art noise robustness and reconstruction fidelity, achieving simultaneous artifact suppression and resolution preservation.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 20","pages":"6357-6360"},"PeriodicalIF":3.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145302463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Switchable edge detection and depth perception with a phase-change image-processing metasurface.","authors":"Jingwen Wang, Fan Gao, Zhouying He, Na Wang, Zhen Zhang, Juan Deng, Bo Yan","doi":"10.1364/OL.575941","DOIUrl":"https://doi.org/10.1364/OL.575941","url":null,"abstract":"<p><p>Recent advances in machine vision, three-dimensional (3D) reconstruction, and biomedical imaging underscore the critical importance of edge extraction and depth perception. However, these applications demand increasingly compact, multifunctional, and highly controllable optical systems. In this work, we propose a reconfigurable multifunctional metasurface based on the phase-change material Ge₂Sb₂Se₄Te₁ (GSST) for near-infrared optical image processing. In its crystalline state of GSST, the metasurface facilitates direct edge-enhanced imaging without a conventional 4-f system. Conversely, in the amorphous state, the same structure implements depth-sensitive point spread functions (PSFs) via a double-helix phase mask, translating axial displacement into angular variations for depth perception. This study provides a theoretical foundation and design methodology for developing highly integrated, programmable optical information processors based on metasurfaces, demonstrating great application potential for near-infrared intelligent imaging and 3D sensing applications.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 20","pages":"6373-6376"},"PeriodicalIF":3.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145302424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Reflective terahertz metalens with hybrid phase design for high-efficiency off-axis focusing.","authors":"Mohsin Raza, Xiaoman Li, Chenlu Mao, Fenghua Liu, Vassili A Fedotov, Weiping Wu","doi":"10.1364/OL.570466","DOIUrl":"https://doi.org/10.1364/OL.570466","url":null,"abstract":"<p><p>A reflective terahertz metalens, optimized at 0.89 THz, capable of high-efficiency off-axis Bessel beam focusing is proposed and numerically demonstrated. The design utilizes a hybrid phase profile combining conical and hyperbolic components, computed using a vector-based formulation for precise wavefront control. Simulations confirm stable transverse confinement and an extended depth of focus exceeding 20 λ for deflection angles of 5°, 10°, and 15°. Our metalens maintains focusing efficiencies above 70% in all cases, validating the robustness of the design. The proposed approach offers a compact and effective solution for off-axis focusing in terahertz systems, with potential for integration in advanced imaging, beam steering, and spectroscopic devices.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 20","pages":"6285-6288"},"PeriodicalIF":3.3,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145302444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}