arXiv - PHYS - Optics最新文献_第10页

Tunable 30 GHz laser frequency comb for astronomical spectrograph characterization and calibration 用于天文光谱仪鉴定和校准的 30 GHz 可调谐激光频率梳

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02627

Pooja Sekhar, Molly Kate Kreider, Connor Fredrick, Joe P Ninan, Chad F Bender, Ryan Terrien, Suvrath Mahadevan, Scott A Diddams

{"title":"Tunable 30 GHz laser frequency comb for astronomical spectrograph characterization and calibration","authors":"Pooja Sekhar, Molly Kate Kreider, Connor Fredrick, Joe P Ninan, Chad F Bender, Ryan Terrien, Suvrath Mahadevan, Scott A Diddams","doi":"arxiv-2408.02627","DOIUrl":"https://doi.org/arxiv-2408.02627","url":null,"abstract":"The search for earth-like exoplanets with the Doppler radial velocity\u0000technique is an extremely challenging and multifaceted precision spectroscopy\u0000problem. Currently, one of the limiting instrumental factors in reaching the\u0000required long-term $10^{-10}$ level of radial velocity precision is the\u0000defect-driven sub-pixel quantum efficiency variations in the large-format\u0000detector arrays used by precision echelle spectrographs. Tunable frequency comb\u0000calibration sources that can fully map the point spread function across a\u0000spectrograph's entire bandwidth are necessary for quantifying and correcting\u0000these detector artifacts. In this work, we demonstrate a combination of laser\u0000frequency and mode spacing control that allows full and deterministic\u0000tunability of a 30 GHz electro-optic comb together with its filter cavity.\u0000After supercontinuum generation, this gives access to any optical frequency\u0000across 700 - 1300 nm. Our specific implementation is intended for the comb\u0000deployed at the Habitable Zone Planet Finder spectrograph and its near-infrared\u0000Hawaii-2RG array, but the techniques apply to all laser frequency combs used\u0000for precision astronomical spectrograph calibration and other applications that\u0000require broadband tuning.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141937263","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 Generalized Dispersion Equation Combining Coupled Modes, Parity-Time Symmetry, and Leaky Waves Describing Non-Decaying Leaky Surface Waves 结合耦合模式、奇偶时对称性和泄漏波的广义频散方程，描述非衰减泄漏面波

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02779

Afshin Abbaszadeh, Jordan Budhu

{"title":"A Generalized Dispersion Equation Combining Coupled Modes, Parity-Time Symmetry, and Leaky Waves Describing Non-Decaying Leaky Surface Waves","authors":"Afshin Abbaszadeh, Jordan Budhu","doi":"arxiv-2408.02779","DOIUrl":"https://doi.org/arxiv-2408.02779","url":null,"abstract":"A generalized dispersion equation is derived featuring coupled mode theory,\u0000parity-time symmetry, and leaky wave antennas of arbitrary periodic modulation.\u0000It can be specialized to each of these cases individually or can describe a\u0000structure containing all three electromagnetic phenomena simultaneously in a\u0000single antenna. This very general dispersion equation is derived using both\u0000mode matching and the transverse resonance method, the latter lacking the\u0000ability to provide the field descriptions and wave impedances at the cost of\u0000computational simplicity. Using the dispersion equation, a sinusoidally\u0000modulated reactive sheet (SMRS) supported by an active impedance sheet backed\u0000dielectric spacer is designed. The active impedance sheet is designed to\u0000compensate the SMRS radiative leakage loss when coupled in close proximity. Due\u0000to the coupling, each spatial harmonic generated by the SMRS modulation is\u0000characterized by a purely real propagation constant and hence leaky wave\u0000radiation is generated from surface waves which do not decay. Due to the\u0000non-decaying nature of the surface waves, an input to output surface wave\u0000port-to-port |S21| would be unity despite an open far field channel being\u0000generated. The non-decaying leaky surface wave antenna is compared to the\u0000traditional PEC backed SMRS. The non-decaying leaky surface waves give rise to\u0000perfect aperture efficiency and the associated radiation pattern making it far\u0000superior to the traditional PEC backed SMRS case. Full-wave simulations\u0000corroborate the results. These types of antennas can make sensors probed from\u0000the far field where changes in S21 amplitude directly correlate to local\u0000changes in the waveguiding environment.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141937258","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

Two-dimensional Keldysh theory for non-resonant strong-field ionization of monolayer 2D materials 单层二维材料非共振强场电离的二维凯尔迪什理论

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02569

Tsing-Hua Her, Che-Hao Chang, Kenan Darden, Tsun-Hsu Chang, Hsin-Yu Yao

引用次数: 0

Coulomb coupling between two nanospheres trapped in a bichromatic optical tweezer 被困在双色光学镊子中的两个纳米球之间的库仑耦合

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02597

Quentin Deplano, Antonio Pontin, Andrea Ranfagni, Francesco Marino, Francesco Marin

引用次数: 0

Moire exciton polaritons in twisted photonic lattices at room temperature 室温下扭曲光子晶格中的莫伊雷激子极化子

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02431

Chunzi Xing, Yu Wang, Tobias Schneider, Xiaokun Zhai, Xinzheng Zhang, Zhenyu Xiong, Hao Wu, Yuan Ren, Haitao Dai, Xiao Wang, Anlian Pan, Stefan Schumacher, Xuekai Ma, Tingge Gao

{"title":"Moire exciton polaritons in twisted photonic lattices at room temperature","authors":"Chunzi Xing, Yu Wang, Tobias Schneider, Xiaokun Zhai, Xinzheng Zhang, Zhenyu Xiong, Hao Wu, Yuan Ren, Haitao Dai, Xiao Wang, Anlian Pan, Stefan Schumacher, Xuekai Ma, Tingge Gao","doi":"arxiv-2408.02431","DOIUrl":"https://doi.org/arxiv-2408.02431","url":null,"abstract":"Moire lattices attract intensive attention in the double graphene/TMD layers\u0000and photonic crystals due to the interesting exotic physics within these\u0000structures. However, precise measurement of the moir'e ground states, excited\u0000states and Bloch bands in the twisted photonic lattices is still illusive. In\u0000this work we report the strong coupling between the excitons of CsPbBr3\u0000microplates and the photonic modes of the moire lattice at room temperature.\u0000Depending on the coupling strength between the nearest potential sites, we\u0000observe staggered moire polariton ground states, excited states trapped in the\u0000potential sites and moire polariton bands across the twisted photonic lattice.\u0000In addition, the phase locking of moire zero (stable in-phase) states and moire\u0000pi (metastable antiphase) states with different spatial distributions are\u0000measured. Moir'e polariton distribution can be tuned in the shape of\u0000parallelogram by controlling the depth and width of the potential in one\u0000photonic lattice with another one fixed. Our work lays the foundation to study\u0000moir'e exciton polariton Wigner crystals and Luttinger liquid in twisted\u0000photonic lattices at room temperature.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141937267","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

Experimental Demonstration of Optically Determined Solar Cell Current Transport Efficiency Map 光学测定太阳能电池电流传输效率图的实验演示

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02463

Amaury DelamarreC2N, Laurent LombezIRDEP, LPCNO, Kentaroh WatanabeRCAST, Masakazu SugiyamaIRDEP, Yoshiaki NakanoIRDEP, IPVF, Jean-Francois GuillemolesIRDEP, IPVF

引用次数: 0

Generation of 480 nm picosecond pulses for ultrafast excitation of Rydberg atoms 产生用于超快激发雷德贝格原子的 480 纳米皮秒脉冲

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02324

Tirumalasetty Panduranga Mahesh, Takuya Matsubara, Yuki Torii Chew, Takafumi Tomita, Sylvain de Léséleuc, Kenji Ohmori

引用次数: 0

Vortex inverted pin beams: Mitigation of scintillations in strong atmospheric turbulence 涡流倒针光束：减少强大气湍流中的闪烁

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02659

Sotiris Droulias, Michalis Loulakis, Dimitris G. Papazoglou, Stelios Tzortzakis, Zhigang Chen, Nikolaos K. Efremidis

引用次数: 0

Dynamics of Relativistic Vortex Electrons in External Laser Fields 外激光场中的相对论涡旋电子动力学

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02390

Mamutjan Ababekri, Yu Wang, Ren-Tong Guo, Zhong-Peng Li, Jian-Xing Li

{"title":"Dynamics of Relativistic Vortex Electrons in External Laser Fields","authors":"Mamutjan Ababekri, Yu Wang, Ren-Tong Guo, Zhong-Peng Li, Jian-Xing Li","doi":"arxiv-2408.02390","DOIUrl":"https://doi.org/arxiv-2408.02390","url":null,"abstract":"Investigating vortex electron interactions with electromagnetic fields is\u0000essential for advancing particle acceleration techniques, scattering theory in\u0000background fields, and obtaining novel electron beams for material diagnostics.\u0000A systematic investigation into the dynamics of vortex electrons in external\u0000laser fields and the exploration of laser-induced vortex modes remains lacking.\u0000In this work, we study the propagation of vortex electrons in linearly\u0000polarized (LP) and circularly polarized (CP) laser pulses, both separately and\u0000in their combined form in two-mode laser pulses. The theoretical formalism is\u0000developed by utilizing Volkov-Bessel wave functions, and the four-current\u0000density is obtained as a crucial observable quantity. Numerical results\u0000illustrate the dynamics of vortex electrons in external lasers, showing that\u0000the beam center of the vortex electron follows the classical motion of a point\u0000charge electron, while maintaining the probability distribution structure for\u0000both vortex eigenstates and superposition modes. The combined effect of LP and\u0000CP laser pulses in the two-mode laser field allows for the versatile control of\u0000vortex electrons, which is absent with LP or CP lasers alone, at femtosecond\u0000and sub-nanometer scales. Our findings demonstrate the versatile control over\u0000vortex electrons via laser pulses, with our formalism providing a reference for\u0000vortex scattering in laser backgrounds and inspiring the laser-controlled\u0000achievement of novel vortex modes as targeted diagnostic probes for specialized\u0000materials.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141937270","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

Field-Tunable Valley Coupling and Localization in a Dodecagonal Semiconductor Quasicrystal 十二边形半导体准晶体中的场调谐谷耦合与定位

arXiv - PHYS - Optics Pub Date : 2024-08-05 DOI: arxiv-2408.02176

Zhida Liu, Qiang Gao, Yanxing Li, Xiaohui Liu, Fan Zhang, Dong Seob Kim, Yue Ni, Miles Mackenzie, Hamza Abudayyeh, Kenji Watanabe, Takashi Taniguchi, Chih-Kang Shih, Eslam Khalaf, Xiaoqin Li

{"title":"Field-Tunable Valley Coupling and Localization in a Dodecagonal Semiconductor Quasicrystal","authors":"Zhida Liu, Qiang Gao, Yanxing Li, Xiaohui Liu, Fan Zhang, Dong Seob Kim, Yue Ni, Miles Mackenzie, Hamza Abudayyeh, Kenji Watanabe, Takashi Taniguchi, Chih-Kang Shih, Eslam Khalaf, Xiaoqin Li","doi":"arxiv-2408.02176","DOIUrl":"https://doi.org/arxiv-2408.02176","url":null,"abstract":"Quasicrystals are characterized by atomic arrangements possessing long-range\u0000order without periodicity. Van der Waals (vdW) bilayers provide a unique\u0000opportunity to controllably vary atomic alignment between two layers from a\u0000periodic moir'e crystal to an aperiodic quasicrystal. Here, we reveal a\u0000remarkable consequence of the unique atomic arrangement in a dodecagonal WSe2\u0000quasicrystal: the K and Q valleys in separate layers are brought arbitrarily\u0000close in momentum space via higher-order Umklapp scatterings. A modest\u0000perpendicular electric field is sufficient to induce strong interlayer K-Q\u0000hybridization, manifested as a new hybrid excitonic doublet. Concurrently, we\u0000observe the disappearance of the trion resonance and attribute it to\u0000quasicrystal potential driven localization. Our findings highlight the\u0000remarkable attribute of incommensurate systems to bring any pair of momenta\u0000into close proximity, thereby introducing a novel aspect to valley engineering.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141937275","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