arXiv - PHYS - Optics最新文献_第9页

Structured Random Model for Fast and Robust Phase Retrieval 用于快速稳健相位检索的结构化随机模型

arXiv - PHYS - Optics Pub Date : 2024-09-09 DOI: arxiv-2409.05734

Zhiyuan Hu, Julián Tachella, Michael Unser, Jonathan Dong

{"title":"Structured Random Model for Fast and Robust Phase Retrieval","authors":"Zhiyuan Hu, Julián Tachella, Michael Unser, Jonathan Dong","doi":"arxiv-2409.05734","DOIUrl":"https://doi.org/arxiv-2409.05734","url":null,"abstract":"Phase retrieval, a nonlinear problem prevalent in imaging applications, has\u0000been extensively studied using random models, some of which with i.i.d. sensing\u0000matrix components. While these models offer robust reconstruction guarantees,\u0000they are computationally expensive and impractical for real-world scenarios. In\u0000contrast, Fourier-based models, common in applications such as ptychography and\u0000coded diffraction imaging, are computationally more efficient but lack the\u0000theoretical guarantees of random models. Here, we introduce structured random\u0000models for phase retrieval that combine the efficiency of fast Fourier\u0000transforms with the versatility of random diagonal matrices. These models\u0000emulate i.i.d. random matrices at a fraction of the computational cost. Our\u0000approach demonstrates robust reconstructions comparable to fully random models\u0000using gradient descent and spectral methods. Furthermore, we establish that a\u0000minimum of two structured layers is necessary to achieve these\u0000structured-random properties. The proposed method is suitable for optical\u0000implementation and offers an efficient and robust alternative for phase\u0000retrieval in practical imaging applications.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-distance nano-holotomography with coded apertures 采用编码孔径的单距离纳米体层成像技术

arXiv - PHYS - Optics Pub Date : 2024-09-08 DOI: arxiv-2409.05163

Viktor Nikitin, Marcus Carlsson, Rajmund Mokso, Peter Cloetens, Doga Gursoy

引用次数: 0

Giant enhancement of the transverse magneto-optical Kerr effect in etchless bismuth-substituted yttrium iron garnet empowered by quasi-bound states in the continuum 无蚀刻铋取代钇铁石榴石在连续体准结合态作用下的横向磁光克尔效应的巨大增强

arXiv - PHYS - Optics Pub Date : 2024-09-08 DOI: arxiv-2409.05121

Qin Tang, Dandan Zhang, Shuyuan Xiao, Meibao Qin, Jizhou He, Tingting Liu, Qinghua Liao, Tianbao Yu

{"title":"Giant enhancement of the transverse magneto-optical Kerr effect in etchless bismuth-substituted yttrium iron garnet empowered by quasi-bound states in the continuum","authors":"Qin Tang, Dandan Zhang, Shuyuan Xiao, Meibao Qin, Jizhou He, Tingting Liu, Qinghua Liao, Tianbao Yu","doi":"arxiv-2409.05121","DOIUrl":"https://doi.org/arxiv-2409.05121","url":null,"abstract":"Here, we propose an etchless bismuth-substituted yttrium iron garnet layer\u0000assisted by a one-dimensional resonant grating waveguide to enhance transverse\u0000magneto-optical Kerr effect (TMOKE) via the excitation of quasi-bound state in\u0000the continuum. The TMOKE amplitude can be tailored by manipulating the\u0000perturbation parameter, and it can reach as high as 1.978, approaching the\u0000theoretical maximum value of 2. Additionally, a single-mode temporal\u0000coupled-mode theory is employed to further reveal the underlying physical\u0000mechanism. It is found that TMOKE is strongly related to the line width of the\u0000quasi-BIC resonance and local field enhancement, which are pivotal factors in\u0000the design and optimization of photonic devices. As a potential application, we\u0000design and numerically demonstrate a refractive index sensor based on the\u0000resonantly enhanced TMOKE, with the optimal sensitivity of 110.66 nm/RIU and\u0000the corresponding maximum figure of merit of 299.3 RIU$^{-1}$. Our work\u0000provides a simple and efficient approach for enhancing TMOKE based on an\u0000easy-to-fabricate platform, laying the groundwork for exploring and developing\u0000magneto-optical devices such as sensors, magnetic storage devices, and\u0000nonreciprocal photonic devices.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strain in 2D TMDCs induced by metal-assisted exfoliation from the polyvinilalcohol-covered substrate 聚乙烯醇覆盖基底金属辅助剥离诱发的二维 TMDC 应变

arXiv - PHYS - Optics Pub Date : 2024-09-08 DOI: arxiv-2409.05008

T. A. Kamenskaya, I. A. Eliseyev, V. Yu. Davydov, A. Yu. Kuntsevich

引用次数: 0

Testing the tomographic Fermi liquid hypothesis with high-order cyclotron resonance 用高阶回旋共振检验层析费米液体假说

arXiv - PHYS - Optics Pub Date : 2024-09-08 DOI: arxiv-2409.05147

Ilia Moiseenko, Erwin Mönch, Kirill Kapralov, Denis Bandurin, Sergey Ganichev, Dmitry Svintsov

{"title":"Testing the tomographic Fermi liquid hypothesis with high-order cyclotron resonance","authors":"Ilia Moiseenko, Erwin Mönch, Kirill Kapralov, Denis Bandurin, Sergey Ganichev, Dmitry Svintsov","doi":"arxiv-2409.05147","DOIUrl":"https://doi.org/arxiv-2409.05147","url":null,"abstract":"Recent theoretical studies of carrier-carrier scattering in degenerate\u0000two-dimensional systems have revealed radically different relaxation times for\u0000odd and even angular harmonics of distribution function. This theoretical\u0000concept, dubbed as 'tomographic Fermi liquid', is yet challenging to test with\u0000dc electrical measurements as electron scattering weakly affects the electrical\u0000resistivity. Here, we show that linewidth and amplitude of electromagnetic\u0000absorption at the multiple harmonics of the cyclotron resonance carries all\u0000necessary information to test the tomographic Fermi liquid hypothesis. Namely,\u0000the height and inverse width of $m$-th order cyclotron resonance ($m ge 2$) is\u0000proportional to the lifetime of $m$-th angular harmonic of electron\u0000distribution function $tau_m$, if probed at wavelengths exceeding the\u0000cyclotron radius $R_c$. Measurements of high-order cyclotron resonance at short\u0000wavelengths order of $R_c$ also enable a direct determination of all lifetimes\u0000$tau_m$ from a simple linear system of equations that we hereby derive.\u0000Extraction of cyclotron resonance lifetimes from an experiment on terahertz\u0000photoconductivity in graphene shows that third-order resonance is\u0000systematically narrower than second-order one, supporting the prediction of\u0000tomographic Fermi liquid hypothesis.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photon Antibunching in Single-Molecule Vibrational Sum-Frequency Generation 单分子振动和频发生中的光子反束现象

arXiv - PHYS - Optics Pub Date : 2024-09-08 DOI: arxiv-2409.05124

Fatemeh Moradi Kalarde, Carlos Sanchez Munoz, Johannes Feist, Christophe Galland

{"title":"Photon Antibunching in Single-Molecule Vibrational Sum-Frequency Generation","authors":"Fatemeh Moradi Kalarde, Carlos Sanchez Munoz, Johannes Feist, Christophe Galland","doi":"arxiv-2409.05124","DOIUrl":"https://doi.org/arxiv-2409.05124","url":null,"abstract":"Sum-frequency generation (SFG) allows for coherent upconversion of an\u0000electromagnetic signal and has applications in mid-infrared vibrational\u0000spectroscopy of molecules. Recent experimental and theoretical studies have\u0000shown that plasmonic nanocavities, with their deep sub-wavelength mode volumes,\u0000may allow to obtain vibrational SFG signals from a single molecule. In this\u0000article, we compute the degree of second order coherence ($g^{(2)}(0)$) of the\u0000upconverted mid-infrared field under realistic parameters and accounting for\u0000the anharmonic potential that characterizes vibrational modes of individual\u0000molecules. On the one hand, we delineate the regime in which the device should\u0000operate in order to preserve the second-order coherence of the mid-infrared\u0000source, as required in quantum applications. On the other hand, we show that an\u0000anharmonic molecular potential can lead to antibunching of the upconverted\u0000photons under coherent, Poisson-distributed mid-infrared and visible drives.\u0000Our results therefore open a path toward a new kind of bright and tunable\u0000source of indistinguishable single photons by leveraging ``vibrational\u0000blockade'' in a resonantly and parametrically driven molecule, without the need\u0000for strong light-matter coupling.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of the micro-focused Brillouin light scattering spectra 微聚焦布里渊光散射光谱建模

arXiv - PHYS - Optics Pub Date : 2024-09-08 DOI: arxiv-2409.05141

Ondřej Wojewoda, Martin Hrtoň, Michal Urbánek

引用次数: 0

High-Transmission Mid-Infrared Bandpass Filters Using Hybrid Metal-Dielectric Metasurfaces for CO2 Sensing 使用混合金属-介电金属表面的高传输中红外带通滤波器，用于二氧化碳传感

arXiv - PHYS - Optics Pub Date : 2024-09-08 DOI: arxiv-2409.05071

Amr Soliman, C Williams, Richard Hopper, Florin Udrea, Haider Butt, Timothy D. Wilkinson

{"title":"High-Transmission Mid-Infrared Bandpass Filters Using Hybrid Metal-Dielectric Metasurfaces for CO2 Sensing","authors":"Amr Soliman, C Williams, Richard Hopper, Florin Udrea, Haider Butt, Timothy D. Wilkinson","doi":"arxiv-2409.05071","DOIUrl":"https://doi.org/arxiv-2409.05071","url":null,"abstract":"Mid-infrared (MIR) spectroscopy is a powerful technique employed for a\u0000variety of applications, including gas sensing, industrial inspection,\u0000astronomy, surveillance, and imaging. Thin-film narrowband interference\u0000filters, targeted to specific absorption bands of target molecules, are\u0000commonly deployed for cost-effective MIR sensing systems. These devices require\u0000complex and time-consuming fabrication processes. Also, their customization on\u0000the micro-scale for emerging miniaturized applications is challenging.\u0000Plasmonic nanostructure arrays operating in reflection and transmission modes\u0000have been developed for MIR. However, they experience undesirable\u0000characteristics, such as broad spectra and low reflection/transmission\u0000efficiencies. All-dielectric metasurfaces have low intrinsic losses and have\u0000emerged as a substitute for plasmonic metasurfaces in MIR spectroscopy.\u0000Nevertheless, they typically operate only in reflection mode. In this work, we\u0000present a hybrid metal-dielectric metasurface for MIR spectroscopy operating in\u0000transmission mode. The metasurface is composed of germanium (Ge) atop aluminum\u0000(Al) cylinders, and we show that the transmission response arises because of\u0000the hybridization of modes arising from the Ge and the Al structures. The\u0000presented metasurface has a high transmission efficiency of 80 % at $lambda =\u00002.6 mutext{m}$, and a narrow full-width-at-half-maximum of $0.4\u0000mutext{m}$. We show numerical simulations, successful fabrication using a\u0000straightforward fabrication method, and deployment as the in-line optical\u0000filter in a CO$_2$ gas detection with a limit of detection of ~0.04% (a few\u0000hundred ppm). Our work demonstrates the potential for hybrid metasurfaces as\u0000in-line gas sensing optical filters in MIR spectroscopy.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differential Sensing Approaches for Scattering-Based Holographic Encryption 基于散射的全息加密的差分传感方法

arXiv - PHYS - Optics Pub Date : 2024-09-08 DOI: arxiv-2409.04969

Mohammadrasoul Taghavi, Edwin A. Marengo

{"title":"Differential Sensing Approaches for Scattering-Based Holographic Encryption","authors":"Mohammadrasoul Taghavi, Edwin A. Marengo","doi":"arxiv-2409.04969","DOIUrl":"https://doi.org/arxiv-2409.04969","url":null,"abstract":"We develop a new scattering-based framework for the holographic encryption of\u0000analog and digital signals. The proposed methodology, termed \"differential\u0000sensing\", involves encryption of a wavefield image by means of two\u0000hard-to-guess, complex and random scattering media, namely, a background and a\u0000total (background plus scatterer) medium. Unlike prior developments in this\u0000area, not one but two scattering media are adopted for scrambling of the\u0000probing wavefields (as encoded, e.g., in a suitable ciphertext hologram) and,\u0000consequently, this method offers enhanced security. In addition, while prior\u0000works have addressed methods based on physical imaging in the encryption phase\u0000followed by computational imaging in the decryption stage, we examine the\u0000complementary modality wherein encryption is done computationally while\u0000decryption is done analogically, i.e., via the materialization of the required\u0000physical imaging system comprising the ciphertext hologram and the two unique\u0000(background and total) media. The practical feasibility of the proposed\u0000differential sensing approach is examined with the help of computer simulations\u0000incorporating multiple scattering. The advantages of this method relative to\u0000the conventional single-medium approach are discussed for both analog and\u0000digital signals. The paper also develops algorithms for the required in situ\u0000holography as well as a new wavefield-nulling-based approach for\u0000scattering-based encryption with envisioned applications in real-time customer\u0000validation and secure communication.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Image color consistency in datasets: the Smooth-TPS3D method 数据集中的图像颜色一致性：平滑-TPS3D 方法

arXiv - PHYS - Optics Pub Date : 2024-09-08 DOI: arxiv-2409.05159

Ismael Benito-Altamirano, David Martínez-Carpena, Hanna Lizarzaburu-Aguilar, Carles Ventura, Cristian Fàbrega, Joan Daniel Prades

{"title":"Image color consistency in datasets: the Smooth-TPS3D method","authors":"Ismael Benito-Altamirano, David Martínez-Carpena, Hanna Lizarzaburu-Aguilar, Carles Ventura, Cristian Fàbrega, Joan Daniel Prades","doi":"arxiv-2409.05159","DOIUrl":"https://doi.org/arxiv-2409.05159","url":null,"abstract":"Image color consistency is the key problem in digital imaging consistency\u0000when creating datasets. Here, we propose an improved 3D Thin-Plate Splines\u0000(TPS3D) color correction method to be used, in conjunction with color charts\u0000(i.e. Macbeth ColorChecker) or other machine-readable patterns, to achieve\u0000image consistency by post-processing. Also, we benchmark our method against its\u0000former implementation and the alternative methods reported to date with an\u0000augmented dataset based on the Gehler's ColorChecker dataset. Benchmark\u0000includes how corrected images resemble the ground-truth images and how fast\u0000these implementations are. Results demonstrate that the TPS3D is the best\u0000candidate to achieve image consistency. Furthermore, our Smooth-TPS3D method\u0000shows equivalent results compared to the original method and reduced the 11-15%\u0000of ill-conditioned scenarios which the previous method failed to less than 1%.\u0000Moreover, we demonstrate that the Smooth-TPS method is 20% faster than the\u0000original method. Finally, we discuss how different methods offer different\u0000compromises between quality, correction accuracy and computational load.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0