Nanophotonics最新文献_第5页

Resonance modes in microstructured photonic waveguides: efficient and accurate computation based on AAA rational approximation

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-17 DOI: 10.1515/nanoph-2024-0755

Felix Binkowski, Fridtjof Betz, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger

引用次数: 0

Optical chirality of all dielectric q-BIC metasurface with symmetry breaking

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-14 DOI: 10.1515/nanoph-2024-0666

Yujia Sun, Chongjun He, Zilan Deng, Xin Li, Xiaozhi Li, Zhongyuan Zhang, Xiubao Sui, Ning Li, Weiji He, Fangzhou Chen

{"title":"Optical chirality of all dielectric q-BIC metasurface with symmetry breaking","authors":"Yujia Sun, Chongjun He, Zilan Deng, Xin Li, Xiaozhi Li, Zhongyuan Zhang, Xiubao Sui, Ning Li, Weiji He, Fangzhou Chen","doi":"10.1515/nanoph-2024-0666","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0666","url":null,"abstract":"As a two-dimensional material at the nanoscale, optical metasurfaces have excellent and flexible optical field control methods. In particular, the application of the concept of bound states in the continuum (BIC) enables optical metasurfaces to achieve resonance effects with high quality factors (Q factor). In comparison to plasmonic metasurfaces, all dielectric metasurfaces can effectively reduce the Ohmic losses in the structure. In this study, we propose a q-BIC metasurface with a high quality factor (maximum Q factor of 247), which is all dielectric and symmetry-breaking, and investigate the enhancement effect of this structure on optical chirality in the near-infrared band. In the simulation and experiment, the transmission spectra of the structure in the near-infrared band exhibited differences at different light source incidence angles when illuminated with circularly polarised light of varying rotation directions (external chirality). The maximum far-field circular dichroism (CD) achieved was 0.17 in the simulation and 0.038 in the experiment. Subsequently, the near-field chirality enhancement of the structure was investigated, which has the potential to increase the optical chirality of the incident light by up to 22 times. Furthermore, the introduction of a chiral medium to a non-chiral metasurface results in a chiral transfer effect, enabling the achievement of circular dichroism beyond the intrinsic capabilities of the individual substances involved (maximum CD = 0.0055). The high-Q factor of the all-dielectric metasurface paves the way for a plenty of potential applications in optical chiral fields, including chiral sensing, ultra-sensitive analysis of biomaterials and soft matter.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"24 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627435","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}

引用次数: 0

Exciton hybridization in a WS2/MoS2 heterobilayer mediated by a surface wave via strong photon–exciton coupling

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-13 DOI: 10.1515/nanoph-2024-0737

Junxuan Yi, Shimei Liu, Shulei Li, Weichen He, Zuxin Chen, Sheng Lan

{"title":"Exciton hybridization in a WS2/MoS2 heterobilayer mediated by a surface wave via strong photon–exciton coupling","authors":"Junxuan Yi, Shimei Liu, Shulei Li, Weichen He, Zuxin Chen, Sheng Lan","doi":"10.1515/nanoph-2024-0737","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0737","url":null,"abstract":"The hybridization of multiple excitons in a heterobilayer composed of two transition metal dichalcogenides (TMDCs) based on strong light–matter interaction is interesting from the viewpoint of both fundamental research and practical application. Here, we investigate numerically and experimentally the hybridization of three excitons in a heterobilayer mediated by the surface plasmon polaritons (SPPs) excited on a thin Au film and the transverse-electric (TE) polarized waves excited on a Si3N4/Ag heterostructure via photon–exciton coupling. Relying on numerical simulation, we observe anticrossing behaviors in the angle-resolved reflection spectra calculated for MoS2/WS2/Au and WS2/MoS2/Si3N4/Ag heterostructures, which reveal the coupling between the surface wave (SPPs or TE waves) and the multiple excitons in the heterobilayer. In experiments, we employ the oligomers of polystyrene (PS) nanospheres as scatters to transfer the surface waves into far-field radiations. Similarly, we observe anticrossing behaviors in the angle-resolved scattering spectra measured for the oligomers of PS nanospheres. Relying on the coupled oscillator model, we observe Rabi splitting energies of ΩSPP ∼206.79 meV for the SPPs and ΩTE ∼237.60 meV for the TE waves. Based on the calculated current density distributions and Hopfield coefficients, we demonstrate the hybridization of the three excitons in the WS2/MoS2 heterobilayer mediated by the TE waves. Our findings open new horizons for manipulating light–matter interaction in TMDC heterobilayers and suggest the potential applications of exciton hybridization in energy transfer.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"40 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618441","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}

引用次数: 0

Deep neural networks for inverse design of multimode integrated gratings with simultaneous amplitude and phase control

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-13 DOI: 10.1515/nanoph-2024-0667

Ali Mohajer Hejazi, Vincent Ginis

引用次数: 0

Tailoring propagation-invariant topology of optical skyrmions with dielectric metasurfaces

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-12 DOI: 10.1515/nanoph-2024-0736

Nilo Mata-Cervera, Zhaoyang Xie, Chi Li, Haoyi Yu, Haoran Ren, Yijie Shen, Stefan A. Maier

引用次数: 0

Centimeter-size achromatic metalens in long-wave infrared

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-12 DOI: 10.1515/nanoph-2024-0716

Fen Zhao, Changchun Zhao, Yuqing Zhang, Jie Chen, Shaoqi Li, Wangzhe Zhou, Chongchong Ran, Yongcan Zeng, Huan Chen, Xin He, Jiagui Wu, Gangyi Zhu, Junbo Yang

{"title":"Centimeter-size achromatic metalens in long-wave infrared","authors":"Fen Zhao, Changchun Zhao, Yuqing Zhang, Jie Chen, Shaoqi Li, Wangzhe Zhou, Chongchong Ran, Yongcan Zeng, Huan Chen, Xin He, Jiagui Wu, Gangyi Zhu, Junbo Yang","doi":"10.1515/nanoph-2024-0716","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0716","url":null,"abstract":"Metalens has shown its significantly ultra-light and ultra-thin features. However, large-aperture achromatic metalens is constrained by both maximum dispersion range and computational memory. Here, we propose a fully device optimizing framework that engineers phase dispersion and amplitude transmittance to create centimeter-size achromatic metalens operating in long-wave infrared regime (8–12 μm). Via wrapping group delay within a defined range and optimizing dispersion phase of desired wavelengths, chromatic aberrations can be effectively corrected. We verify our design by characterizing all-silicon 3.18-cm-diameter and 6.36-cm-diameter LWIR achromatic metalenses. Diffraction-limited tight-focusing can be achieved, and the normalized focal length shift is less than 3.3 × 10−4. Thermal imaging performance is verified on targets of holes or letters with a diameter or line width exceeding 2 mm. These findings facilitate the development of large-aperture achromatic metalenses and open up possibilities for lightweight imaging systems in long-wave infrared.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"114 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608221","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}

引用次数: 0

Long lived surface plasmons on the interface of a metal and a photonic time-crystal

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-11 DOI: 10.1515/nanoph-2024-0735

Lior Bar-Hillel, Yonatan Plotnik, Ohad Segal, Mordechai Segev

引用次数: 0

Exceptional points in a passive strip waveguide

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-10 DOI: 10.1515/nanoph-2024-0701

Shamkhal Hasanli, Mehedi Hasan, Hyejin Yoon, Seungyong Lee, Sangsik Kim

{"title":"Exceptional points in a passive strip waveguide","authors":"Shamkhal Hasanli, Mehedi Hasan, Hyejin Yoon, Seungyong Lee, Sangsik Kim","doi":"10.1515/nanoph-2024-0701","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0701","url":null,"abstract":"Exceptional points (EPs) in non-Hermitian systems have attracted significant interest due to their unique behaviors, including novel wave propagation and radiation. While EPs have been explored in various photonic systems, their integration into standard photonic platforms can expand their applicability to broader technological domains. In this work, we propose and experimentally demonstrate EPs in an integrated photonic strip waveguide configuration, exhibiting unique deep wave penetration and uniform-intensity radiation profiles. By introducing the second-order grating on one side of the waveguide, forward and backward propagating modes are coupled both directly through second-order coupling and indirectly through first-order coupling via a radiative intermediate mode. To describe the EP behavior in a strip configuration, we introduce modified coupled-mode equations that account for both transverse and longitudinal components. These coupled-mode formulas reveal the formation of EPs in bandgap closure, achieved by numerically optimizing the grating’s duty cycle to manipulate the first- and second-order couplings simultaneously. Experimental observations, consistent with simulations, confirm the EP behavior, with symmetric transmission spectra and constant radiation profiles at the EP wavelength, in contrast to conventional exponential decay observed at detuned wavelengths. These results demonstrate the realization of EPs in a widely applicable strip waveguide configuration, paving the way for advanced EP applications in nonlinear and ultrafast photonics, as well as advanced sensing technologies.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"47 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143589792","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}

引用次数: 0

Description of ultrastrong light–matter interaction through coupled harmonic oscillator models and their connection with cavity-QED Hamiltonians

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-10 DOI: 10.1515/nanoph-2024-0528

Unai Muniain, Javier Aizpurua, Rainer Hillenbrand, Luis Martín-Moreno, Ruben Esteban

引用次数: 0

Exploiting the combined dynamic and geometric phases for optical vortex beam generation using metasurfaces 利用元表面的动态和几何组合相位生成光学涡流束

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-10 DOI: 10.1515/nanoph-2025-0004

Jialong Cui, Chen Qing, Lishuang Feng, Dengke Zhang

{"title":"Exploiting the combined dynamic and geometric phases for optical vortex beam generation using metasurfaces","authors":"Jialong Cui, Chen Qing, Lishuang Feng, Dengke Zhang","doi":"10.1515/nanoph-2025-0004","DOIUrl":"https://doi.org/10.1515/nanoph-2025-0004","url":null,"abstract":"The generation of optical vortex beams is pivotal for a myriad of applications, encompassing optical tweezing, optical communications, and quantum information, among others. The metasurface-based approach has realized significant advancements in vortex production, utilizing either dynamic or geometric phases. The dynamic design exhibits indifference to the polarization state of incident light, while the geometric design is inextricably tied to it. In the study, we put forth the proposition that combining dynamic and geometric phases could unlock the potential of metasurface design in generating optical vortices. A hybrid design that harnesses the combined dynamic and geometric phases can attain the same objective while offering tunable functional control over the polarization of light. We establish a correlation between the structural parameters of metasurface and the topological charge of the resulting vortices. The experimental results fully demonstrate the design’s flexibility and its effective control over the polarization constraints of incident light. Our research uncovers the capacity for vortex generation through the manipulation of hybrid phases introduced by metasurfaces, indicating significant potential for the design of optical devices and the future advancement of innovative optical applications.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"59 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143589794","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}

引用次数: 0