arXiv - PHYS - Optics最新文献

Three-dimensional topological valley photonics 三维拓扑谷光子学

arXiv - PHYS - Optics Pub Date : 2024-09-18 DOI: arxiv-2409.11715

Wenhao Li, Qiaolu Chen, Ning Han, Xinrui Li, Fujia Chen, Junyao Wu, Yuang Pan, Yudong Ren, Hongsheng Chen, Haoran Xue, Yihao Yang

{"title":"Three-dimensional topological valley photonics","authors":"Wenhao Li, Qiaolu Chen, Ning Han, Xinrui Li, Fujia Chen, Junyao Wu, Yuang Pan, Yudong Ren, Hongsheng Chen, Haoran Xue, Yihao Yang","doi":"arxiv-2409.11715","DOIUrl":"https://doi.org/arxiv-2409.11715","url":null,"abstract":"Topological valley photonics, which exploits valley degree of freedom to\u0000manipulate electromagnetic waves, offers a practical and effective pathway for\u0000various classical and quantum photonic applications across the entire spectrum.\u0000Current valley photonics, however, has been limited to two dimensions, which\u0000typically suffer from out-of-plane losses and can only manipulate the flow of\u0000light in planar geometries. Here, we have theoretically and experimentally\u0000developed a framework of three-dimensional (3D) topological valley photonics\u0000with a complete photonic bandgap and vectorial valley contrasting physics.\u0000Unlike the two-dimensional counterparts with a pair of valleys characterized by\u0000scalar valley Chern numbers, the 3D valley systems exhibit triple pairs of\u0000valleys characterized by valley Chern vectors, enabling the creation of\u0000vectorial bulk valley vortices and canalized chiral valley surface states.\u0000Notably, the valley Chern vectors and the circulating propagation direction of\u0000the valley surface states are intrinsically governed by the right-hand-thumb\u0000rule. Our findings reveal the vectorial nature of the 3D valley states and\u0000highlight their potential applications in 3D waveguiding, directional\u0000radiation, and imaging.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256794","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

Optical intensity-gradient torque due to chiral multipole interplay 手性多极相互作用导致的光强度梯度扭矩

arXiv - PHYS - Optics Pub Date : 2024-09-18 DOI: arxiv-2409.11924

Jiquan Wen, Huajin Chen, Hongxia Zheng, Xiaohao Xu, Shaohui Yan, Baoli Yao, Zhifang Lin

引用次数: 0

Scaling of pseudospectra in exponentially sensitive lattices 指数敏感晶格中伪谱的缩放

arXiv - PHYS - Optics Pub Date : 2024-09-18 DOI: arxiv-2409.12036

Ioannis Kiorpelidis, Konstantinos G. Makris

{"title":"Scaling of pseudospectra in exponentially sensitive lattices","authors":"Ioannis Kiorpelidis, Konstantinos G. Makris","doi":"arxiv-2409.12036","DOIUrl":"https://doi.org/arxiv-2409.12036","url":null,"abstract":"One of the important features of non-Hermitian Hamiltonians is the existence\u0000of a unique type of singularities, the so-called exceptional points. When the\u0000corresponding systems operate around such singularities, they exhibit\u0000ultrasensitive behavior that has no analog in conservative systems. An\u0000alternative way to realize such ultra-sensitivity relies on asymmetric\u0000couplings. Here we provide a comprehensive analysis based on pseudospectra,\u0000that shows the origin of exponential sensitivity, without relying on\u0000topological zero modes or the localization of all eigenstates (skin effect),\u0000but on the underlying extreme non-normality of the problem. In particular, we\u0000consider four different type of lattices (Hatano-Nelson, Sylvester-Kac, NH-SSH\u0000and NH-Random lattice) and identify the conditions for exponential sensitivity\u0000as a function of the lattice size. Complex and structured pseudospectra reveal\u0000the signatures of exponential sensitivity both on the eigenvalue spectra and on\u0000the underlying dynamics. Our study, may open new directions on studies related\u0000to the exploitation of non-normality for constructing ultra-sensitive systems\u0000that do not rely on the existence of EPs.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256790","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

Rotation effect in optical imaging of symmetrical figures in an opaque screen 不透明屏幕对称图形光学成像中的旋转效应

arXiv - PHYS - Optics Pub Date : 2024-09-18 DOI: arxiv-2409.11814

A. Bekirov, V. Sitnyansky, S. Senotrusova, B. Lukyanchuk, I. Yaminsky, A. Fedyanin

引用次数: 0

Enwrapped Perylene Bisimide Enables Room Temperature Polariton Lasing and Photonic Lattices 包覆聚二亚胺可实现室温极化子激光和光子晶格

arXiv - PHYS - Optics Pub Date : 2024-09-18 DOI: arxiv-2409.12093

Dominik Horneber, Johannes Düreth, Tim Schembri, Simon Betzold, Matthias Stolte, Sven Höfling, Frank Würthner, Sebastian Klembt

{"title":"Enwrapped Perylene Bisimide Enables Room Temperature Polariton Lasing and Photonic Lattices","authors":"Dominik Horneber, Johannes Düreth, Tim Schembri, Simon Betzold, Matthias Stolte, Sven Höfling, Frank Würthner, Sebastian Klembt","doi":"arxiv-2409.12093","DOIUrl":"https://doi.org/arxiv-2409.12093","url":null,"abstract":"Perylene bisimides (PBIs) are organic dyes with photoluminescence quantum\u0000yields (PLQY) close to unity in solution and great thermal and photo-chemical\u0000stability. These features alongside the tunability of their solid-state packing\u0000arrangement via chemical functionalization make this material class an\u0000excellent candidate for exciton-polariton lasing at room temperature. Polariton\u0000lasing is well understood in III-V semiconductors at cryogenic temperatures,\u0000however, the search for emitter materials for robust and versatile room\u0000temperature applications is ongoing. While e.g. perovskites and several organic\u0000materials have been identified to support polariton lasing, many of these\u0000materials lack tunability and long-term stability under ambient conditions.\u0000Here, we fabricate optical microcavities using a strongly enwrapped PBI\u0000chromophore with prevailing monomer-like absorption and emission properties in\u0000the solid state. Voluminous bay-substituents prevent stacking induced\u0000PLQY-quenching, thereby enabling polariton lasing at room temperature.\u0000Additionally, photonic confinement in single hemispheric resonators is\u0000demonstrated leading to localized polaritonic modes with discrete energies, as\u0000well as optical lattices revealing distinct polaritonic band-structures. Due to\u0000the possibility of tunable properties by the precise control of the solid-state\u0000packing arrangement of PBI emitters, our results pave the way for\u0000polarization-dependent light-matter coupling, including topological photonic\u0000effects within oriented crystalline thin-film microcavity structures.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256788","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

Chiral patterning of rough surfaces with vortex laser beams: from structured polarization to twisted forces 用涡旋激光束对粗糙表面进行手性图案化：从结构偏振到扭曲力

arXiv - PHYS - Optics Pub Date : 2024-09-18 DOI: arxiv-2409.12077

Vladimir Yu. Fedorov, Jean-Philippe Colombier

{"title":"Chiral patterning of rough surfaces with vortex laser beams: from structured polarization to twisted forces","authors":"Vladimir Yu. Fedorov, Jean-Philippe Colombier","doi":"arxiv-2409.12077","DOIUrl":"https://doi.org/arxiv-2409.12077","url":null,"abstract":"The ability to create surface structures with precisely controlled chirality\u0000remains a major challenge in laser-matter interaction experiments. In this\u0000work, we theoretically study the interaction of vortex laser beams,\u0000characterized by spiral polarization patterns and twisted wavefronts, with\u0000rough metallic surfaces in order to create surface patterns with chirality.\u0000Using numerical simulations based on the finite-difference time-domain method,\u0000we investigate how spin and orbital angular momenta influence the inhomogeneous\u0000energy absorption at the surface and generate twisted optical forces that can\u0000drive topographic reorganization. We show how different structured light fields\u0000can create intricate patterns with chiral features on a material surface. We\u0000emphasize the crucial role of polarization and spatial inhomogeneity of the\u0000light field in the generation of asymmetric torque forces that directly affect\u0000the surface dynamics. Our electromagnetic simulations show how vortex beams can\u0000be used to create chiral surface structures, expanding our knowledge of\u0000laser-generated periodic surface structures and opening up new possibilities\u0000for chiral surface engineering.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256789","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

Surface Phonon Polariton Ellipsometry 表面声子极化椭偏仪

arXiv - PHYS - Optics Pub Date : 2024-09-18 DOI: arxiv-2409.12035

Giulia Carini, Richarda Niemann, Niclas Sven Mueller, Martin Wolf, Alexander Paarmann

{"title":"Surface Phonon Polariton Ellipsometry","authors":"Giulia Carini, Richarda Niemann, Niclas Sven Mueller, Martin Wolf, Alexander Paarmann","doi":"arxiv-2409.12035","DOIUrl":"https://doi.org/arxiv-2409.12035","url":null,"abstract":"Surface phonon polaritons (SPhPs) have become a key ingredient for infrared\u0000nanophotonics, owing to their long lifetimes and the large number of polar\u0000dielectric crystals supporting them. While these evanescent modes have been\u0000thoroughly characterized by near-field mapping or far-field intensity\u0000measurements over the last decade, far-field optical experiments also providing\u0000phase information are less common. In this paper, we study surface phonon\u0000polaritons at the gallium phosphide (GaP)-air interface in the momentum domain\u0000using the Otto-type prism coupling geometry. We combine this method with\u0000spectroscopic ellipsometry to obtain both amplitude and phase information of\u0000the reflected waves across the entire reststrahlen band of GaP. By adjusting\u0000the prism-sample air gap width, we systematically study the dependence of the\u0000ellipsometry parameters on the optical coupling efficiency. In particular, we\u0000show that the combined observation of both ellipsometry parameters - amplitude\u0000and phase - provides a powerful tool for the detection of SPhPs, even in the\u0000presence of high optical losses. Finally, we theoretically study how surface\u0000phonon polariton ellipsometry can reveal the emergence of vibrational strong\u0000coupling through changes in the topology of their complex plane trajectories,\u0000opening up a new perspective on light-matter coupling.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256791","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

Optical Label-Free Microscopy Characterization of Dielectric Nanoparticles 无标签光学显微镜表征介电纳米粒子

arXiv - PHYS - Optics Pub Date : 2024-09-18 DOI: arxiv-2409.11810

Berenice Garcia Rodriguez, Erik Olsén, Fredrik Skärberg, Giovanni Volpe, Fredrik Höök, Daniel Sundås Midtvedt

{"title":"Optical Label-Free Microscopy Characterization of Dielectric Nanoparticles","authors":"Berenice Garcia Rodriguez, Erik Olsén, Fredrik Skärberg, Giovanni Volpe, Fredrik Höök, Daniel Sundås Midtvedt","doi":"arxiv-2409.11810","DOIUrl":"https://doi.org/arxiv-2409.11810","url":null,"abstract":"In order to relate nanoparticle properties to function, fast and detailed\u0000particle characterization, is needed. The ability to characterize nanoparticle\u0000samples using optical microscopy techniques has drastically improved over the\u0000past few decades; consequently, there are now numerous microscopy methods\u0000available for detailed characterization of particles with nanometric size.\u0000However, there is currently no ``one size fits all'' solution to the problem of\u0000nanoparticle characterization. Instead, since the available techniques have\u0000different detection limits and deliver related but different quantitative\u0000information, the measurement and analysis approaches need to be selected and\u0000adapted for the sample at hand. In this tutorial, we review the optical theory\u0000of single particle scattering and how it relates to the differences and\u0000similarities in the quantitative particle information obtained from commonly\u0000used microscopy techniques, with an emphasis on nanometric (submicron) sized\u0000dielectric particles. Particular emphasis is placed on how the optical signal\u0000relates to mass, size, structure, and material properties of the detected\u0000particles and to its combination with diffusivity-based particle sizing. We\u0000also discuss emerging opportunities in the wake of new technology development,\u0000with the ambition to guide the choice of measurement strategy based on various\u0000challenges related to different types of nanoparticle samples and associated\u0000analytical demands.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256445","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

A group-IV double heterostructure light emitting diode for room temperature gain in Silicon 用于硅室温增益的第 IV 组双异质结构发光二极管

arXiv - PHYS - Optics Pub Date : 2024-09-17 DOI: arxiv-2409.11081

Andreas Salomon, Johannes Aberl, Lada Vukušić, Enrique Prado-Navarrete, Jacqueline Marböck, Diego-Haya Enriquez, Jeffrey Schuster, Kari Martinez, Heiko Groiss, Thomas Fromherz, Moritz Brehm

{"title":"A group-IV double heterostructure light emitting diode for room temperature gain in Silicon","authors":"Andreas Salomon, Johannes Aberl, Lada Vukušić, Enrique Prado-Navarrete, Jacqueline Marböck, Diego-Haya Enriquez, Jeffrey Schuster, Kari Martinez, Heiko Groiss, Thomas Fromherz, Moritz Brehm","doi":"arxiv-2409.11081","DOIUrl":"https://doi.org/arxiv-2409.11081","url":null,"abstract":"The lack of straightforward epitaxial integration of useful telecom lasers on\u0000silicon remains the major bottleneck for bringing optical interconnect\u0000technology down to the on-chip level. Crystalline silicon itself, an indirect\u0000semiconductor, is a poor light emitter. Here, we identify conceptionally simple\u0000Si/Si$_{1-x}$Ge$_x$/Si double heterostructures (DHS) with large Ge content ($x\u0000gtrsim 0.4$) as auspicious gain material suitable for Si-based integrated\u0000optics. In particular, using self-consistent Poisson-current transport\u0000calculations, we show that Si diodes containing a 16 nm thick Si$_{1-x}$Ge$_x$\u0000layer of high crystalline quality, centered at the p-n junction, results in\u0000efficient carrier accumulation in the DHS and gain if the diode is driven in\u0000forward direction. Despite the high strain, we unambiguously demonstrate that\u0000such prior unattainable defect-free DHS can be fabricated using ultra-low\u0000temperature epitaxy at pristine growth pressures. Telecom light emission is\u0000persistent up to 360 K, and directly linked to a ~160 meV high conduction band\u0000barrier for minority electron injection. This epitaxy approach allows further\u0000increasing the Ge content in the DHS and creating dot-in-well heterostructures\u0000for which even higher gains are predicted. Thus, the surprisingly facile DHS\u0000presented here can be an essential step toward novel classes of group-IV\u0000optoelectronic devices for silicon photonics.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256458","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

A modified recursive transfer matrix algorithm for radiation and scattering computation of multilayer spheres 用于多层球辐射和散射计算的修正递归传递矩阵算法

arXiv - PHYS - Optics Pub Date : 2024-09-17 DOI: arxiv-2409.10877

Jianing Zhang

引用次数: 0