Article
Nanoscience & Nanotechnology
I. Brian Becerril-Castro, Irene Calderon, Jana Ockova, Matz Liebel, Niek F. van Hulst, Vincenzo Giannini, Ramon A. Alvarez-Puebla
Summary: This paper presents and implements a new approach for producing modular inkjet-printable surface-enhanced Raman scattering (SERS) chemosensors. These sensors, combined with a rapid large field-of-view imaging system, allow for fast imaging of the chemical characteristics of a sample.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Theng-Loo Lim, Yaswant Vaddi, M. Saad Bin-Alam, Lin Cheng, Rasoul Alaee, Jeremy Upham, Mikko J. Huttunen, Ksenia Dolgaleva, Orad Reshef, Robert W. Boyd
Summary: This study introduces the concept of Fourier lattice resonances (FLRs) and achieves complete control over the transmission spectrum of a metasurface by flexibly placing resonances. Based on standard lithographic fabrication methods, metasurfaces suitable for various optical cavity applications can be designed and manufactured.
Article
Chemistry, Multidisciplinary
Bela Lovasz, Peter Sandor, Gellert-Zsolt Kiss, Balazs Banhegyi, Peter Racz, Zsuzsanna Papa, Judit Budai, Christine Prietl, Joachim R. Krenn, Peter Dombi
Summary: This study explores nonadiabatic nano-optical electron tunneling in the transition region between multiphoton-induced emission and adiabatic tunnel emission in the near-field of plasmonic nanostructures. The measured photoemission spectra exhibit strong-field recollision driven by the nanoscale near-field for Keldysh gamma values between approximately 1.3 and approximately 2.2. At the same time, the photoemission yield shows a constant nonlinearity in intensity scaling, which is characteristic of multiphoton-induced emission.
Article
Physics, Applied
Florian Herz, Svend-Age Biehs
Summary: In this paper, the direct thermal emission spectrum and far-field emission of a plasmonic Su-Schrieffer-Heeger chain of InSb nanoparticles, as well as the near-field scattering by a sharp tip used in scattering type thermal microscopes, are investigated. The measurability of the topological phase transition in both far-field and near-field experiments is discussed, and the signatures of the topological edge modes are highlighted. The impact of a substrate is also discussed.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Zhihai Liu, Fenghui Hu, Yu Zhang, Yaxun Zhang, Kai Zhang, Wenjie Su, Jianzhong Zhang, Xinghua Yang, Libo Yuan
Summary: This article introduces an all-fiber near-field optical tweezer for stable trapping of nanoparticles. The device uses a laser beam that has been totally reflected three times on a fiber tip to generate an evanescent field on the fiber end-face, trapping nanoparticles in water. Experimental results demonstrate that this all-fiber near-field optical tweezer can trap fluorescent particles as small as 100 nanometers in diameter with insignificant temperature rise.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Maosong Liu, Xin Jin, Shun Li, Jean-Baptiste Billeau, Tingyu Peng, Henan Li, Long Zhao, Zuotai Zhang, Jerome P. Claverie, Luca Razzari, Jianming Zhang
Summary: The recent application of localized surface plasmon resonances (SPRs) in metallic nanoparticles has led to the construction of plasmonic nanohybrids for heterogeneous photocatalysis. By encapsulating an Ag NP core with SiO2 and TiO2 layers, and Au NPs on the outer surface, an efficient plasmonic photocatalyst, Ag@SiO2@TiO2-Au, has been designed to enhance catalytic activity. The structure unit with strong scattering and field enhancement induced by a plasmonic resonator is shown to significantly boost photocatalytic activity for high H-2 production rates under visible light.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Tchiya Zar, Alon Krause, Omer Shavit, Hannah Aharon, Racheli Ron, Martin Oheim, Adi Salomon
Summary: Metamaterials and plasmonic structures made from aluminum have advantages such as low cost, long-term stability, and abundant resources. In this study, second harmonic generation (SHG) in the optical regime from triangular hole arrays in thin aluminum films was detected. The results showed intense nonlinear responses, year-long stability, and superior performances compared to gold. The high spatio-temporal resolution imaging using a non-linear single-spinning disk microscope has important applications in studying chemical transformations and aging processes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Bin Meng, Yong Xie, Le Chen, Haitao Wang, Ming Li, Zhuxin Dong
Summary: This paper presents a convenient technical scheme for enhancing the performance of atomic force microscopy (AFM) tips in tip-enhanced Raman spectroscopy (TERS) applications. The silver decoration on homemade tips is confined to the apex of commercial tips through an AFM-controlled electrochemical reaction. The efficiency of the metal coating is ensured by the reduction of Ag+ in a highly sealed environment. Key factors affecting the process include the use of silver nitrate solution, ambient relative humidity and temperature, electric potential bias, and tip-surface distance. The silver-coated tips are then tested for TERS measurement of carbon nanotubes (CNTs), resulting in simultaneous characterization of the CNTs' morphology and chemical properties. The Raman spectra show that our plasmonic tip exhibits a local field signal increase of approximately 30-fold, and the corresponding TERS image can resolve at the single-pixel level laterally.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Erfan Saydanzad, Jeffrey Powell, Adam Summers, Seyyed Javad Robatjazi, Carlos Trallero-Herrero, Matthias F. Kling, Artem Rudenko, Uwe Thumm
Summary: In this study, the generation and dynamics of photoelectrons from plasmonic nanostructures under intense laser pulses in the infrared regime were investigated. It was found that the contribution from direct photoemission significantly increased, suggesting the potential for developing compact tunable electron sources.
Article
Nanoscience & Nanotechnology
Yaohui Zhan, Lei Zhang, Mohsen Rahmani, Vincenzo Giannini, Andrey E. Miroshnichenko, Minghui Hong, Xiaofeng Li, Stefan A. Maier, Dangyuan Lei
Summary: Optical nanocircuits, inspired by electrical nanocircuits, provide a versatile platform for tailoring and manipulating optical fields at the subwavelength scale. Plasmonic nanoparticles can be employed as promising building blocks for optical nanocircuits with high integration capacity. The investigation of special plasmonic oligomers in the metatronic paradigm reveals a close correlation between circuitry and strongly coupled plasmonic oligomers, guiding the modulation of plasmonic responses through geometric variation.
Article
Optics
Shangyu Zhang, Jian Dong, Wenjie Zhang, Minggang Luo, Linhua Liu
Summary: In this study, the specific influence mechanisms of host dissipation on the extinction efficiency factors of a plasmonic nanosphere are elaborated using a generalized Mie theory. The experimental results demonstrate that host dissipation has a significant impact on the position and properties of localized surface plasmon resonance.
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
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
Zhuangqiang Gao, Shikuan Shao, Weiwei Gao, Dianyong Tang, Dianping Tang, Shengli Zou, Moon J. Kim, Xiaohu Xia
Summary: The study introduces an effective method for designing morphology-stable nanoparticles with tunable plasmonic properties by controlling internal structure; Plasmonic properties of the nanoparticles can be conveniently adjusted by varying the material deposited on the inner surfaces without changing the overall morphology; The nanoparticles show potential applications in colorimetric sensing with low detection limits.
Article
Chemistry, Multidisciplinary
Catherine Sadatnajafi, Eugeniu Balaur, Brian Abbey
Summary: Optical metamaterials enable precise control of light at the nanoscale, attracting interest in various fields such as chemical sensing and photovoltaics. Plasmonic color filters can be used for direct optical imaging and characterization of ion implantation in thin films, providing valuable insights for electronic applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Analytical
Shin-Hua Huang, Yen-Jie Huang, Hsiang-Chen Chui
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Optics
Daixuan Wu, Liangxia Qin, Jiawei Luo, Zeyang Liao, Xiaoming Chen, Hsiang-Chen Chui, Yuecheng Shen
Article
Optics
Xiaoming Chen, Zixian Wang, Ren-Jie Wu, Horng-Long Cheng, Hsiang-Chen Chui
Summary: Perovskite microwires exhibit better photoelectric conversion efficiency through laser annealing for crystallization, with the degree of crystallization affecting their optoelectrical performance. A novel on-site, real-time laser-induced thermal annealing design was proposed in the study, providing real-time information on annealing and crystallization. Polarized Raman signals can serve as evidence of crystallization in perovskite microwires.
Article
Spectroscopy
Xiaoming Chen, Ying Xu, Zixian Wang, Ren-Jie Wu, Horng-Long Cheng, Hsiang-Chen Chui
Summary: In this study, the structural properties of organic-inorganic lead halide perovskite microwires were investigated through experimental and theoretical Raman spectroscopy. The crystal quality and crystalline orientation of the microwires were determined using Raman spectroscopy, allowing for characterization of the material properties.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Engineering, Electrical & Electronic
Xiaoming Chen, Zhiyuan Wang, Ying Xu, Chin-Chun Tsai, Nan-Kuang Chen, Hsiang-Chen Chui
Summary: A stable blue optical frequency reference was designed using an absorption spectroscopy method and an external cavity diode laser, achieving high stability.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Xiaoming Chen, Ying Xu, Chin-Chun Tsai, Yi-Hsi Chen, Nan-Kuang Chen, Hsiang-Chen Chui
Summary: We have developed a single-frequency green laser system with high power and narrow linewidth using injection locking technique.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2023)
Article
Optics
Xiaoming Chen, Ying Xu, Nan-Kuang Chen, Shannon Shy, Hsiang-Chen Chui
Summary: Precision laser micromachining is crucial in various industries, with a focus on accurate depth detection. The optical detection system presented in this study has been experimentally proven to achieve over 95% accuracy for micron-diameter holes that are tens-of-microns deep. This system can be seamlessly integrated into commercial laser micromachining processes, and is suitable for laser drilling and three-dimensional active-feedback laser printing.
Article
Chemistry, Analytical
Xiaoming Chen, Zhixuan Wang, Zhiyang Yu, Hsiang-Chen Chui
Summary: By proposing a time-varying pseudorandom disturbance algorithm and combining it with automatic test pattern generation technology, the test accuracy and fault coverage of high-speed railway-related equipment boards can be improved. This algorithm uses a random seed and a new switching logic to design a time-varying pseudorandom pattern generation method, which has been proven to be effective through experimental results.
Article
Chemistry, Physical
Jiayi Li, Rui Li, Ying Xu, Xiaojun Xue, Xiaoming Chen, Hsiang-Chen Chui
Summary: This study proposes a simple and easily fabricated nanostructured template for surface-enhanced Raman spectroscopy (SERS) and analyzes the wavelength-dependent factors. The impact of different excitation wavelengths on SERS signals is investigated through experiments and simulations. The findings are helpful in understanding SERS signals when the excitation laser wavelength is located outside the resonance region of molecules and provide a new approach for designing and fabricating SERS templates with nanopillar arrays for different excitation wavelengths.
Article
Optics
Jiayi Li, Rui Li, Xiaojun Xue, Xiao Jiang, Xiaoming Chen, Hsiang-Chen Chui
Summary: We propose a single metalens combined with a Polydimethylsiloxane (PDMS) layer for fiber coupling in telecom bands. This metalens replaces traditional bulky and complex fiber collimators, achieving achromatic aberration over a certain wavelength band. The focal length is maintained at 514.9 μm with a tolerance of 6.92 μm, and the average coupling efficiency of the achromatic lens is calculated as 0.43. The use of nanopillar element structures generates different phases. This approach provides a more convenient, integrated, and efficient way of coupling fiber optics, which can be applied to achromatic lens design in other wavelength regions.
Article
Chemistry, Analytical
Wujun Guo, Zhiyang Yu, Hsiang-Chen Chui, Xiaoming Chen
Summary: The safety of railway transportation is vital for social and economic development, necessitating real-time monitoring of the rail. Electromagnetic ultrasonic transducers (EMATs) have gained attention as a non-contact detection technology. However, traditional EMATs have limitations such as low conversion efficiency and complex modes, hindering their effectiveness for long-distance monitoring.
Article
Physics, Applied
Kaizhu Liu, Yanhong Li, Chengchao He, Changsen Sun, Xue Han, Hisang-Chen Chui
Summary: In this work, a surface electric field enhancement device based on the combined effect of surface plasmons resonance and surface plasmon polariton was proposed. By optimizing the relationship between the morphology of the nanostructures and the electric field components, the intensity of the surface polarized plasmons can be further enhanced. The method allows for tunable control of the electric field enhancement by controlling the number of meta-atoms that excite surface plasmon polaritons.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Kaizhu Liu, Hsiang-Chen Chui, Changsen Sun, Xue Han
Summary: This article proposes a method for predicting the plasmonic metasurface using the ResNets-10 model, and achieves lower prediction loss through training. The proposed model can effectively replace traditional computing methods and has a high training efficiency. Additionally, it can also be applied to design meta-diffractive devices and meta-resonance biosensors, reducing simulation time and contributing to the development of future artificial intelligence electromagnetic devices computing software.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Linxian Liu, Jiayi Li, Zhiyuan Wang, Ying Xu, Nan-Kuang Chen, Hsiang-Chen Chui
Summary: We present a compact NO2 detection system using a wavelength-tunable single-frequency blue laser and hollow core fiber. The system combines absorption dips and photoacoustic signals to achieve low detection limit and long dynamic range, which is important for agricultural and environmental engineering.
IEEE SENSORS LETTERS
(2022)
Article
Computer Science, Information Systems
Liqiang Zhang, Zhen Tian, Nan-Kuang Chen, Kenneth T. V. Grattan, Yicun Yao, B. M. Azizur Rahman, Xiaohui Li, Chengkai Yao, Haili Han, Hsiang-Chen Chui, Shien-Kuei Liaw
