Article
Materials Science, Multidisciplinary
Yiqun Ji, Zhendong Yan, Chaojun Tang, Fanxin Liu, Jing Chen, Ping Gu, Zhengqi Liu, Zhong Huang
Summary: Research on classical analogy of asymmetric Fano resonances has been active in recent years due to the steep dispersion of the Fano-like profile in classical systems. By studying double Fano-like resonances in a waveguide structure composed of a periodic array of gold nanospheres on an ITO film, this study explores the interference coupling between dipolar surface plasmon mode and waveguide modes. Adjusting the array period of the gold nanospheres or thickness of the ITO film can shift resonance peaks towards the low-frequency side and achieve red-shifted excitation frequencies of waveguide modes.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Vasilios Karanikolas, Ioannis Thanopulos, Joel D. Cox, Takashi Kuroda, Jun-ichi Inoue, N. Asger Mortensen, Emmanuel Paspalakis, Christos Tserkezis
Summary: The study theoretically explores the influence of quantum surface effects in metal-dielectric layered nanostructures on the relaxation dynamics of a proximal two-level QE. The results reveal a clear splitting in the emission spectrum and non-Markovian relaxation dynamics of the emitter, indicating the presence of strong light-matter coupling despite nonclassical surface effects in the metal's optical response.
Article
Chemistry, Physical
Guodong Zhu, Linhong Qv, Yangzhe Guo, Yurui Fang
Summary: Special antisymmetric ring gap modes can be excited on the surface of a disk in close proximity to a metallic thin film in the visible light region, thanks to the strong plasmon interaction between the disk and the film. The application of plasmon hybridization method effectively illustrates the generation of these unique modes.
Article
Optics
Yunqing Jiang, Hongqing LI, Xiaoqiang Zhang, Fan Zhang, Yong Xu, Yongguang Xiao, Fengguang Liu, Anting Wang, Qiwen Zhan, Weisheng Zhao
Summary: The Tamm plasmon coupling (TPC) between spin THz thin films and photonic crystal structures is achieved, resulting in enhanced THz radiation. Simulation results show that the absorptance of spin THz thin films with TPC can be increased from 36.8% to 94.3%. Experimental results demonstrate a 264% enhancement in THz radiation. This approach offers possibilities for ultrafast THz optospintronics and other similar devices.
PHOTONICS RESEARCH
(2023)
Article
Optics
Zhenyu Zhao, Mingjie Du, Chunping Jiang, Hua Qin, Rajour Tanyi Ako, Sharath Sriram
Summary: A cost-effective strategy is presented to achieve a terahertz photonic edge mode using a metasurface of strongly coupled fourfold spoof localized surface plasmons. The quality factors of edge modes decrease as the tetramer shrinks. The edge modes can be categorized as inner and outer edge modes based on the simulated electric field distribution. These edge modes are due to the interaction of spoof localized surface plasmons in the terahertz band.
Article
Materials Science, Multidisciplinary
Gareth P. Ward, John D. Smith, Alastair P. Hibbins, J. Roy Sambles, Timothy A. Starkey
Summary: The effect of glide symmetry on the dispersion of acoustic surface waves supported by lines of open-ended holes in acrylic plates is investigated. It is found that glide symmetry removes the necessary condition for the formation of standing waves of supported even and odd character acoustic surface waves at the first Brillouin zone boundary, and instead a mixed even-odd hybrid mode appears. This mode evolves continuously with increasing frequency to a greater in-plane wave vector range than possible without the glide condition. This paper demonstrates that glide symmetry opens up a degree of freedom for the design of acoustic metamaterial devices that control acoustic energy on a surface.
Article
Physics, Multidisciplinary
Xuefan Yin, Takuya Inoue, Chao Peng, Susumu Noda
Summary: In this Letter, a mechanism to achieve unidirectional guided resonances (UGRs) through interband coupling effect and up-down symmetry breaking is reported. The topological nature of UGRs, including their generation, evolution, and annihilation, is investigated using phase winding numbers as topological indices. The findings provide new possibilities for light manipulation.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Jun Wu, Ye Ming Qing
Summary: The strong coupling between excitons in few-layer transition-metal dichalcogenide (TMDC) and guided mode resonance (GMR) or bound state in the continuum (BIC) is investigated. The results show that a large Rabi splitting can be achieved by changing the grating period, reaching up to 155 meV or 162 meV, respectively. The physical origins behind this behavior are revealed through studying the electric field distributions at resonance and theoretical verification according to the coupled-oscillator model. The effect of geometric dimensions on the strong coupling is also studied, offering guidance for real fabrication and paving the way for novel, compact TMDC-based polaritonic devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Jie Han, Yuehong Xu, Huifang Zhang, Yuanhao Lang, Xiaohan Jiang, Xieyu Chen, Xi Feng, Li Niu, Yanfeng Li, Xueqian Zhang, Quan Xu, Quan Li, Jiaguang Han, Weili Zhang
Summary: A new directional coupling strategy for controlling surface plasmons (SPs) by utilizing interference effects between different resonance responses of slit resonators is introduced. The strategy demonstrates versatile design capability and flexibility in various polarized incidence situations. This approach paves the way for practical on-chip applications in developing innovative and on-demand plasmonic devices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chun-Yuan Wang, Yungang Sang, Xinyue Yang, Soniya S. Raja, Chang-Wei Cheng, Haozhi Li, Yufeng Ding, Shuoyan Sun, Hyeyoung Ahn, Chih-Kang Shih, Shangjr Gwo, Jinwei Shi
Summary: This study demonstrates a strong coupling system achieved by coupling localized surface plasmon modes. Under specific conditions, a root N scaling of Rabi splitting energy is observed, along with a confirmed giant Rabi splitting in the visible spectral range. Additionally, the coupling strength reaches the ultrastrong coupling regime in some cases, representing about 10% of the mode energy.
Article
Chemistry, Analytical
Victor Coello, Mas-ud A. Abdulkareem, Cesar E. Garcia-Ortiz, Citlalli T. Sosa-Sanchez, Ricardo Tellez-Limon, Marycarmen Pena-Gomar
Summary: In this study, the optical properties of a 2D-gap surface plasmon metasurface composed of gold nanoblocks were investigated. The metasurface demonstrated the capability to generate simultaneous multi-plasmonic resonances and offered tunability within the near-infrared domain. Reflectance spectra were analyzed for various lattice periods, revealing two distinct dips with near-zero reflectance indicating resonant modes. The broader dip at 1150 nm exhibited consistent behavior across all lattice periodicities, attributed to a Fano-type hybridization mechanism.
Article
Materials Science, Multidisciplinary
Ziwei Li, Yajuan Wang, Lihui Li, Yunfei Xie, Chenglin He, Pan Xu, Xuehong Zhang, Jianhua Huang, Ming Huang, Liuli Yang, Juan Du, Xiaoli Zhu, Anlian Pan
Summary: Low-dimensional perovskite structures are excellent materials for nano/microlasers due to their optical gain properties and high emission efficiency. Achieving single-mode and tunable lasing behaviors in micro-scale perovskite poses a challenge. In this research, CsPbBr3/Ag hemispheroids were synthesized using a designed chemical vapor deposition (CVD) process, resulting in low pump thresholds and single-mode/two-mode lasing behaviors.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Optics
S. K. Jaiswal, J. B. Maurya, Y. K. Prajapati
Summary: This paper examines the plasmonic structure in terms of angle of incidence using the prism-based Kretschmann configuration. The field-dependent performance parameters, such as field enhancement, penetration depth, and propagation length, are investigated for p- and s-polarized monochromatic incident light. The study reveals that field enhancement is highest at resonance angle, but penetration depth and propagation length are not maximum/minimum at this angle. At the critical angle, penetration depth is at its highest, while propagation length is at its lowest.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Chemistry, Physical
Pengwei Li, Hongfang Wang, Zulhumar Turup, Xiaoyu Yang, Jingyu Wang, Min Gao
Summary: Efficiently manipulating plasmonic modes by adjusting geometry, spatial arrangement, and the nature of the material has shown great potential in ultrasensitive sensing, optical modulation, and surface-enhanced spectroscopy. Symmetry breaking as an effective geometry-controlled method can induce plasmonic hybridization and further tune resonant wavelength, strength, and electromagnetic fields. Theoretical design of a symmetry-breaking Ag nano-cube with an introduced cavity along the lateral edges allows for arbitrary tuning of plasmonic modes based on plasmon hybridization theory. This research provides insight into the mechanism of light-matter interactions and paves the way for efficient nanophotonic platforms in plasmon-enhanced spectroscopy and optical wave manipulations.
APPLIED SURFACE SCIENCE
(2023)
Article
Optics
Yunjie Shi, Wei Liu, Shidi Liu, Tianyu Yang, Yuming Dong, Degui Sun, Guangyuan Li
Summary: This study demonstrates the strong coupling between plasmonic surface lattice resonances and photonic Fabry-Perot resonances in a microcavity embedded with a periodic array of metal-insulator-metal nanopillars. The high-energy upper polaritons resulting from this coupling exhibit similar characteristics as the plasmonic SLR, with an almost double quality factor. The work provides a new scheme for strong coupling between plasmonic and photonic modes and suggests a new direction for improving the quality factor of SLRs.