Article
Physics, Applied
Sukhvinder Kaur, Subhajit Karmakar, Arun Jana, Ravendra Kumar Varshney, Dibakar Roy Chowdhury
Summary: Dark resonating states play a crucial role in reducing radiative losses in various photonic structures. Indirect excitation through structural asymmetries triggers the evolution of dark resonating states, offering potential applications in metasurfaces.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Tamitake Itoh, Yuko S. Yamamoto
Summary: In this study, we investigate the spectral relationships between electromagnetic enhancement, surface-enhanced resonant Raman scattering (SERRS), and surface-enhanced fluorescence (SEF) by using single silver nanoparticle dimers as a model system. We focus on the lowest-energy plasmon in far-field scattering and classify the spectral relationships into two types. Based on our analysis, we find that dipole-dipole and dipole-quadrupole-coupled plasmon resonance are responsible for the electromagnetic enhancement.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Physics, Applied
G. J. Hornig, K. G. Scheuer, R. G. DeCorby
Summary: We have observed the acoustic vibrational modes of liquid droplets up to 40 MHz by coupling them to an ultra-sensitive optomechanical sensor. These modes manifest as Fano resonances in the thermal noise spectrum of the sensor, driven only by thermal Brownian motion.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Giada R. La Gala, Arvind Shankar Kumar, Rick Leijssen, Ewold Verhagen, Juha T. Muhonen
Summary: Balanced homodyne interferometry is a widely used technique for detecting and characterizing light fields with high sensitivity. Traditionally, a homodyne interferometer locks the relative phase between a reference beam and a signal beam using an active feedback loop. However, an alternative method of averaging all relative phases by modulating the reference beam arm length has been shown to be advantageous for estimating the parameters of an optical cavity. This approach does not require active feedback, provides easy interpretation of results, and allows characterization of absolute magnitude of cavity frequency modulation.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
Jun Peng, Wenjie Zhang, Peng Suo, Xian Lin, Xiaona Yan, Guohong Ma
Summary: This paper investigates the intrinsic link between surface plasmon modes and lattice modes in subwavelength periodic structures using the split-ring metamaterial structure. The study demonstrates that strong coupling between the eigenmodes and lattice modes can be achieved by adjusting the meta-material structure's period. This coupling leads to the emergence of new modes at low frequencies, reducing spectral loss and increasing the Q factor.
Article
Physics, Applied
Mengyuan Du, Zhe Shen
Summary: The paper introduces a double-resonance substrate for enhanced Raman scattering, which effectively detects objects by matching frequencies. The substrate generates strong electric field enhancement double Fano resonance, with the potential to adjust resonance peaks by changing parameters and accurately determine cavity length through theoretical calculation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Celine Jegat, Edouard Rollin, Ludovic Douillard, Olivier Soppera, Keitaro Nakatani, Guillaume Laurent
Summary: The article presents a new method for patterning assemblies of gold nanorods on substrates and a study on the near-field coupling induced by the aggregation of the nanoparticles. By investigating single, dimer, and elongated aggregates of the nanorods, the study shows different types of near-field coupling efficiency depending on the incident light polarization, interparticle gaps, and angles between the nanorods. Hot spots of the near-field are associated with the interparticle gap regions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Physics, Applied
Kengo Motokura, Minoru Fujii, Dmitry Nesterenko, Zouheir Sekkat, Shinji Hayashi
Summary: This study developed a simple technique to experimentally study the average behavior of local electric fields inside interacting planar waveguide layers. The observed changes in the local electric fields were well reproduced by simple analytical calculations, providing physical insights that cannot be obtained through electromagnetic calculations.
PHYSICAL REVIEW APPLIED
(2021)
Article
Chemistry, Multidisciplinary
Shunsheng Ye, Huaining Zha, Yifan Xia, Wenhao Dong, Fan Yang, Chenglin Yi, Jing Tao, Xiaoxue Shen, Dong Yang, Zhihong Nie
Summary: This article presents a bottom-up strategy to precisely organize and orient plasmonic molecules on substrates using a combination of directional capillary force and supporting polymer film. The resulting superlattices exhibit highly tunable collective optical properties, making them suitable for advanced plasmonic devices.
Article
Optics
Jian Chen, Guangwei Hu, Guangtao Cao, Yan Deng, Lei-ming Zhou, Zhengji Wen, Hui Yang, Guanhai Li, Xiaoshuang Chen
Summary: This study investigates the mode-mode interaction mechanism in photonic molecules composed of degenerate-mode cavity and single-mode cavity, revealing that direct coupling can lift mode degeneracy and lead to mode splitting. The introduction of direct coupling results in single Fano resonance and dual EIT-like effects in the double-cavity photonic molecule structure, with improved filtering bandwidth and peak transmission.
Article
Chemistry, Physical
Min Xi, Cui Liu, Nian Li, Shudong Zhang, Zhenyang Wang
Summary: Plasmonic hybridization in complex nanostructures is studied in this manuscript, comparing the similarities of different building blocks and analyzing the effects of separation and coupling. The research contributes to the fundamental understanding of plasmonic hybridization systems and opens up new possibilities in the fields of plasmonic-photonics and nanoplasmonics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Atsushi Sugita, Kenshin Muroi, Yohsei Nakatsuka, Sohta Tamotsu
Summary: This paper presents the second harmonic generation behavior of a dolmen-type Au nanostructure under surface plasmon resonance conditions. The study demonstrates that arranging metal nanoparticles in a noncentrosymmetric shape can enhance the second-order nonlinear optics effect, resulting in higher SHG signals. The enhanced SHG signals are attributed to the hybridized bonding state between the dipolar plasmon of the monomer moiety and the quadrupolar plasmon of the dimer moiety.
Article
Optics
Zhiwei Hu, Ximin Cui, Yang Li, Xiaobo Han, Huatian Hu
Summary: This study numerically demonstrates a simple plasmonic nanocube-hexagonal-nanoplate heterodimer that exhibits a strong, tunable self-induced transparency window. It also observes multiple exciton-induced transparency windows. These findings are important for understanding and manipulating light-matter interactions.
Article
Materials Science, Multidisciplinary
Chuhua Wu, Zicong Guo, Shuxian Chen, Jun Yang, Kunhua Wen
Summary: In this study, a coupled plasmonic resonant system using a metal-insulator-metal (MIM) waveguide is proposed to generate multiple Fano resonances. By employing the multi-mode interference coupled-mode theory (MICMT), the system is analyzed theoretically and numerically validated with the finite-difference time-domain (FDTD) method. The designed structures show great potential for high integrated optical circuits of chip-scale optical sensors, slow light devices, or splitters, with the ability to manipulate Fano peaks through adjusting the parameters of the defective ring cavity.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Mikhail Odit, Kirill Koshelev, Sergey Gladyshev, Konstantin Ladutenko, Yuri Kivshar, Andrey Bogdanov
Summary: This study investigates the experimental observation of supercavity modes in dielectric resonators with high refractive index, and discusses the achievement of supercavity modes through precise tuning of resonator dimensions. Experimental results demonstrate efficient excitation of supercavity modes in both near- and far-fields, exhibiting characteristic Fano resonance properties.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Jianing Lu, Shaoding Liu, Sean S. E. Collins, Linlong Tang, Xingzhan Wei, Paul Mulvaney
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Optics
Shao-Ding Liu, Peng Yue, Ming-Qi Zhu, Jing Wen, Dangyuan Lei
Article
Physics, Applied
Hong-Gang Hu, Min Yang, Peng Yue, Ya-Ting Bai, Wen-Jie Wang, Shao-Ding Liu
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Shao-Ding Liu, Peng Yue, Shi Zhang, Mingshan Wang, Hongwei Dai, Yiqin Chen, Zhong-Quan Nie, Yanxia Cui, Jun-Bo Han, Huigao Duan
ADVANCED OPTICAL MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Shi Zhang, Xupeng Zhu, Wei Xiao, Huimin Shi, Yasi Wang, Zhiquan Chen, Yiqin Chen, Kai Sun, Otto L. Muskens, C. H. De Groot, Shao-Ding Liu, Huigao Duan
Article
Optics
Jingdong Chen, Yating Song, Tingting Zhang, Wenjie Wang, Shaoding Liu
OPTICS COMMUNICATIONS
(2020)
Article
Nanoscience & Nanotechnology
Shao-Ding Liu, Jun-Yan Liu, Zhaolong Cao, Jin-Li Fan, Dangyuan Lei
Article
Nanoscience & Nanotechnology
Qiang Zhang, Danjun Liu, Qun Ren, Nicolae C. Panoiu, Li Lin, Jian Ye, Yang Huang, Shao-Ding Liu, Chi Wah Leung, Dangyuan Lei
Summary: The study investigates the plasmonic properties of gold CMS nanojunctions and the impact of electron transport on them using two-photon luminescence spectroscopy. The results suggest that the near-field response is more affected by electron transport than the far-field property, contributing to the understanding of charge transport mechanisms in molecular structures.
Article
Optics
Tingting Zhang, Shuangquan Hua, Zhenghua Li, Wenjie Wang, Shaoding Liu
Summary: This manuscript explores the performance of a hollow thin film array (HTFA) for detecting HCl vapor based on fluorescence quenching. The HTFA structure is fabricated by stacking active thin film and supporting film layers alternately, with each supporting film having a hollow structure. The results show that the HTFA sample can achieve high sensing efficiency in both fluorescence and laser detection methods.
Article
Chemistry, Physical
Jieting Ban, Ying Yu, Peng Yue, Lanqi Lian, Cheng Xu, Lei Guo, Shao-Ding Liu
Summary: This study experimentally demonstrates that the two-photon luminescence of individual CsPbBr3 nanocrystal superlattices is enhanced by about 16 times compared to randomly oriented nanocrystal films. The nanocrystal superlattices possess a 4-fold symmetry similar to single-crystal film structures. They exhibit broad nonlinear absorption responses, leading to wide-range interband photoluminescence below the bandgap. Moreover, the two-photon absorption coefficient can reach 0.644 cm/MW, comparable to materials like WS2 and ZnO. These superior performances make the CsPbBr3 nanocrystal superlattices promising for applications in nonlinear devices such as optical power limiting and optical switches.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Optics
Wenjie Wang, Zhenghua Li, Tingting Zhang, Shuangquan Hua, Shaoding Liu
Summary: In this paper, the authors analyzed DNA methylation using laser-based melting method and achieved the differentiation of different DNA samples by optimizing the pump intensity and setting the melting temperature at an optimized value. They also analyzed mixes of methylated and nonmethylated DNAs with different mole percentages based on laser slope coefficients.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Yating Bai, Haiyan Zheng, Qiang Zhang, Shao-ding Liu
Summary: This study demonstrates that by enlarging the lattice spacing, the oscillator strength of metallic nanoparticles can be enhanced, leading to narrower pairs of perfect absorption. The coupling and mode hybridization with the surface lattice resonance result in improved quality factors and near-field enhancements compared to localized plasmon resonances.
Article
Optics
Wenjuan Zhao, Qiang Zhang, Haiyan Zheng, Yating Bai, Ying Yu, Zhihui Chen, Xiaoyan Yun, Shao-ding Liu
Summary: The realization of flexible tuning and enhanced chiral responses is vital for many applications in nanophotonics. This study proposes using heterostructures consisting of chiral dielectric metasurfaces and achiral J-aggregates to manipulate the collective optical responses, achieving flexible tuning and enhanced chiral responses. The resonance coupling between the chiral quasi-bound states in the continuum (QBICs) and the achiral exciton mode leads to large mode splitting and anticrossing in both the transmission and circular dichroism (CD) spectra, indicating the formation of hybrid chiral eigenmodes and the realization of the strong coupling regime. Considering that the radiative and dissipative damping of the hybrid eigenmodes depends on the coherent energy exchange, the chiral resonances can be flexibly tuned by adjusting the geometry and optical constants for the heterostructure, and the CD of the three hybrid eigenmodes approach the maximum (similar to 1) simultaneously when the critical coupling conditions are satisfied, which can be promising for enhanced chiral light-matter interactions.
Article
Optics
Yanxiang Zhang, Xiaofei Liu, Han Lin, Dan Wang, Ensi Cao, Shaoding Liu, Zhongquan Nie, Baohua Jia
Summary: This study proposes a new method for ultrafast modulation of multi-target focal fields based on the combination of time-dependent vectorial diffraction theory and fast Fourier transform. By focusing femtosecond pulsed light carrying vectorial-vortex, the importance of ultrafast temporal degree of freedom in determining the characteristics of the focused optical field is revealed, along with the underlying control mechanisms. The results of this study have wide-ranging applications in fields such as multifunctional integrated optical chips, high-efficiency laser trapping, and super-resolution optical microscopy.
OPTO-ELECTRONIC ADVANCES
(2022)
Article
Optics
Tingting Zhang, Zhuonan Jia, Zhenghua Li, Shuangquan Hua, Jingdong Chen, Wenjie Wang, Shaoding Liu
OPTICS COMMUNICATIONS
(2020)