Article
Chemistry, Physical
Zofia Krzeminska, Janusz E. E. Jacak, Witold A. A. Jacak
Summary: The damping of plasmons in metallic nanoparticles is much greater than that caused by scattering and other factors. This is particularly noticeable in nanometer-scale confinement. The coupling of plasmons to nearby absorbing media cannot be fully explained by classical electrodynamic treatment and requires the application of the quantum Fermi golden rule. The perfect cancellation of radiative losses in metallic nano-chains cannot be modeled using conventional optical constants.
Article
Optics
L. Avalos, A. K. Gonzalez-Alcalde, E. Chaikina, E. E. Garcia-Guerrero, A. A. Maradudin, E. R. Mendez
Summary: The study investigates the optical properties of metallic lamellar gratings with sub-wavelength period as a function of groove depth and width. Anomalies are observed under p-polarized illumination due to the excitation of surface plasmon polaritons (SPPs) and their interaction with plasmonic and photonic modes. The propagation constant of SPPs is affected by the presence of corrugations, with new resonances appearing for grooves deeper than half a wavelength.
OPTICS COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Nikolai B. Chichkov, Andrey B. Evlyukhin, Boris N. Chichkov
Summary: The letter evaluates the rest mass of light-induced surface-plasmon polaritons (SPPs) and discusses the idea of collisions between two massive SPP quasiparticles resulting in frequency changes according to energy and momentum conservation laws.
Article
Chemistry, Physical
Sen Yan, Hao Ma, Yi-Fan Bao, Maofeng Cao, Chuan Liu, Kaifeng Zhang, Xiaowei Wu, Jianbo He, Xiang Wang, Bin Ren
Summary: In this study, a series of plasmonic array structures with different unit numbers were fabricated using focused ion beam (FIB) technology. The effects of the array structures on optical response were investigated using photoluminescence (PL) and surface-enhanced Raman spectroscopy (SERS). It was found that the array units outside the excitation spot still have a significant impact on the optical response, due to the loss of propagating surface plasmon polaritons (PSPPs) outside the excitation point caused by the finite array boundary. This research advances the understanding of near-field and far-field optical behavior in finite-size array structures, and provides guidance for designing highly efficient photonic devices.
Article
Chemistry, Multidisciplinary
Jun-Wei Liao, Zhen-Ting Huang, Chia-Hung Wu, Nikita Gagrani, Hark Hoe Tan, Chennupati Jagadish, Kuo-Ping Chen, Tien-Chang Lu
Summary: In this study, localized surface plasmon lasing at room temperature in the communication band was achieved using metallic nanoholes as plasmonic nanocavity and InP nanowires as gain medium. Optimization of laser performance was demonstrated through coupling between two metallic nanoholes, allowing for manipulation of lasing properties. These plasmonic nanolasers offer lower power consumption, smaller mode volumes, and higher spontaneous emission coupling factors, making them promising for high-density sensing and photonic integrated circuits.
Article
Physics, Multidisciplinary
Xiaorun Zang, Andriy Shevchenko
Summary: This study explores further enhancement of near-field enhancement by placing a metal-dielectric slab waveguide beneath the lattice of metal nanoparticles. Numerical simulations show that this approach can significantly increase the near-field intensity, providing an 80-fold increase over single-particle plasmon resonance and a 7-fold increase over lattice-resonance enhancement. This enhancement mechanism can be used to design extraordinarily efficient nonlocal optical metasurfaces for various applications.
NEW JOURNAL OF PHYSICS
(2023)
Article
Multidisciplinary Sciences
Yaniv Kurman, Raphael Dahan, Hanan Herzig Sheinfux, Kangpeng Wang, Michael Yannai, Yuval Adiv, Ori Reinhardt, Luiz H. G. Tizei, Steffi Y. Woo, Jiahan Li, James H. Edgar, Mathieu Kociak, Frank H. L. Koppens, Ido Kaminer
Summary: Investigating the dynamic phenomena of 2D polaritons in 2D materials requires the use of a ultrafast transmission electron microscope with simultaneous spatial and temporal imaging capabilities, which can reveal unknown coherent optical phenomena such as splitting of multibranch wave packets, wave packet deceleration, and acceleration.
Article
Optics
Wanqi Zhao, Yu Cheng, Ming Chen, Shijie Deng, Houquan Liu, Chuanxin Teng, Hongyan Yang, Hongchang Deng, Libo Yuan
Summary: This paper proposes an accompanying waveguide coupling structure of micro/nano fibers and studies the excitation and coupling characteristics of surface plasmon polaritons (SPPs) through numerical simulations. The optimal coupling enhancement configuration is obtained, and structures resembling interferometric devices can be designed, providing new insights for high-performance miniaturized devices.
Article
Chemistry, Physical
Ning Li, Xiangdong Guo, Xiaoxia Yang, Ruishi Qi, Tianyu Qiao, Yifei Li, Ruochen Shi, Yuehui Li, Kaihui Liu, Zhi Xu, Lei Liu, F. Javier Garcia de Abajo, Qing Dai, En-Ge Wang, Peng Gao
Summary: The study successfully measured and observed phonon polaritons in monolayer hexagonal boron nitride using monochromatic electron energy-loss spectroscopy, revealing highly confined and ultraslow group velocity characteristics. The large momentum compensation provided by electron beams also enabled phonon polariton excitation over the entire Reststrahlen band of multilayer hexagonal boron nitride.
Article
Materials Science, Multidisciplinary
Ibrahim A. M. Al-Ani, Khalil As'Ham, Mohammed Alaloul, Lei Xu, Haroldo T. Hattori, Lujun Huang, Andrey E. Miroshnichenko
Summary: In recent years, the study of exciton-polaritons in semiconductor materials has gained significant attention due to their unique optical properties. This study demonstrates a double strong coupling regime in a perovskite and tungsten disulfide (WS2) monolayer, achieving high Rabi splitting. The findings of this study open up new possibilities for the development of polaritonic devices.
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
Multidisciplinary Sciences
Zi-Lan Deng, Tan Shi, Alex Krasnok, Xiangping Li, Andrea Alu
Summary: Experimental demonstration shows that electromagnetic skyrmions based on magnetic localized spoof plasmons exhibit high topological robustness, paving the way for the development of flexible sensors, wearable electronics, and ultra-compact antennas. These skyrmions maintain stability on materials of different shapes, demonstrating flexible texture characteristics.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Qihui Ye, Chen Wang, Jiaojiao Chen, Shuai Guo, Gang Song
Summary: We theoretically investigate a circular dichroism (CD) spectrum enhancement in a silver disk-chiral TDBCs-silver disk structure in the strong coupling regime. The chirality of TDBCs is amplified by the localized surface plasmons (LSPs) excited in the two Ag disk structure. Our proposed structure provides a new method to detect the chirality of TDBCs in experiment due to the large amplification of CD spectrum.
Article
Chemistry, Multidisciplinary
Qiao Wang, Kaili Kuang, Huixuan Gao, Shuwen Chu, Li Yu, Wei Peng
Summary: This paper investigates the EIT-like effect achieved through the coupling of two waveguide resonances in a compound nanosystem. It demonstrates that destructive interference between two dark modes can lead to the realization of EIT-like effect. The findings suggest potential for further studies on EIT-like effect with dark-dark mode coupling in other systems.
Article
Nanoscience & Nanotechnology
Yang Xiong, Huatian Hu, Tianzhu Zhang, Yuhao Xu, Fei Gao, Wen Chen, Guangchao Zheng, Shunping Zhang, Hongxing Xu
Summary: We report a quantitative molecular detection method based on surface-enhanced Raman spectroscopy (SERS) that achieves ultrahigh sensitivity in detecting alpha fetoprotein in serum using a nanoparticle-on-mirror plasmonic sensor. By adjusting the gaps between the nanoparticles and the gold film, a uniform and strong SERS enhancement is achieved. The detection limit is 697 times higher than that of the normal excitation method and 7800 times higher than a commercial assay kit, providing a potential solution for the bottleneck in SERS-based biosensing.
