Article
Nanoscience & Nanotechnology
Shaobo Li, Shuming Yang, Fei Wang, Qiang Liu, Biyao Cheng, Yossi Rosenwaks
Summary: This paper proposes an asymmetric fiber tip for broadband interference nanofocusing within its full optical wavelengths, achieving significant control over plasmonic resonance and providing fundamental insights into plasmon engineering with important applications in plasmon nanophotonic technologies.
Article
Optics
Shiyu Li, Guomeng Zuo, Nishan Wu, Zhao Yang, Benyang Zhao, Li Xia, Wei Li
Summary: The study introduces a hybrid plasmonic nanofocusing waveguide for a surface-enhanced Raman scattering tweezer, enabling on-chip Raman detection and optical trapping. By optimizing the tweezer design, it is able to efficiently trap and detect 20 nm diameter sample particles, showcasing the potential for integrated SERS detection and optical manipulation on a chip.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Fanfan Lu, Wending Zhang, Min Liu, Lu Zhang, Ting Mei
Summary: Tip-based plasmonic nanofocusing is a novel optical microscope integrating surface plasmons and a sharp metal tip, which generates highly localized enhanced electric field and provides morphological information. This technique can be used to understand the nano-world, including spatial structures of chemicals and physical, electronic, and catalytic properties of substances.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Optics
Vishal Sorathiya, Osama S. Faragallah, Hala S. El-Sayed, Mahmoud M. A. Eid, Ahmed Nabih Zaki Rashed
Summary: This article introduces a novel method for achieving nanofocusing from single-mode fiber to photonic crystal. By using a staircase structure, nanofocusing in the range of nanometers has been achieved. The mathematical modeling of the nanofocusing structure is also demonstrated and compared with simulation results.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
Article
Optics
Dongxue Wang, Ze Zhang, Jianwei Wang, Ke Ma, Hua Gao, Xi Wang
Summary: A novel plasmonic probe made of a gradient permittivity material (GPM) is proposed in this paper, and its enhanced nanofocusing effects are achieved by designing the distribution of the probe permittivity. This new type of probe has outstanding advantages in simplifying the probe system and improving the spectral sensitivity and spatial resolution of s-SNOM. It can be realized using conventional semiconductor materials.
Article
Optics
Fanfan Lu, Wending Zhang, Lixun Sun, Ting Mei, Xiaocong Yuan
Summary: A substrate with a circular nanocavity is proposed in this study to enhance the nanofocusing and optical trapping characteristics of plasmonic tip nanofocusing. Experimental results show that the electric field intensity can be further increased on this substrate, allowing for stable trapping of small nanoparticles.
Article
Chemistry, Multidisciplinary
Sungwoo Lee, Soohyun Lee, Jae-Myoung Kim, Jiwoong Son, Eunbyeol Cho, Sungjae Yoo, Hajir Hilal, Jwa-Min Nam, Sungho Park
Summary: A novel strategy was reported for synthesizing Pt@Au nanorings with near-field focusing capabilities at the center, enabling readily observable single-particle surface enhanced Raman scattering. By utilizing a Galvanic exchange process, an Au nanoporous structure was successfully fabricated at the inner domain of the Pt@Au nanoring, maximizing near-field focusing and achieving high enhancement factors for single-particle SERS measurements.
Article
Physics, Multidisciplinary
Sun Peng-Fei, Zhu Ke-Jian, Xu Peng-Fei, Liu Xing-Peng, Sun Tang-You, Li Hai-Ou, Zhou Zhi-Ping
Summary: Silicon-based optoelectronics is a widely studied large-scale optoelectronic integration platform. In this research, a hybrid surface plasmon nanofocusing device is designed and fabricated using silicon-based optoelectronic technology. This device demonstrates excellent nanofocusing performance and has the potential for various optical applications.
ACTA PHYSICA SINICA
(2022)
Article
Nanoscience & Nanotechnology
Vladimir A. Zenin, Sergey I. Bozhevolnyi
Summary: This paper discusses the concept and mechanisms of nanofocusing, exploring its wide range of applications in enhancing optical phenomena and beyond. It showcases the significant role of nanofocusing in modern nanotechnology applications.
Article
Spectroscopy
Ondrej Petrus, Jan Macko, Renata Orinakova, Andrej Orinak, Erika Mudra, Miriam Kupkova, Zdenek Farka, Matej Pastucha, Vladimir Socha
Summary: This study presents the development of a NiAg nanocavity film for the SERS-based detection of organic dyes, demonstrating its potential for detecting ultra-low concentrations of samples. Experimental results confirm the superior performance of the NiAg nanocavity film in SERS detection of organic dyes.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Nanoscience & Nanotechnology
Zhou Zeng, Prabhu K. Venuthurumilli, Xianfan Xu
Summary: Inverse design has expanded the performance optimization of photonic devices, but challenges arise when applied to plasmonic structures due to local field concentrations that can cause errors in gradient calculation. The discrete adjoint method allows for exact gradient calculation, historically used with a Finite Element model and rarely attempted with the Finite-Difference Time-Domain (FDTD) method in the inverse design of plasmonic structures. To address this, the discrete adjoint method is developed with FDTD for the inverse design of plasmonic structures, demonstrating the exactness of gradient calculation and overcoming challenges unique to plasmonic structures.
Article
Optics
Donghui Bai, Lu Zhang, Chao Meng, Lei Xu, Feng Gao, Wending Zhang
Summary: This study quantitatively analyzed the nonlinear and linear effects of plasmonic tip-based nanofocusing. The experimental results showed a significant increase in second harmonic emission intensity of the plasmonic tips array under excitation of ultrafast radial vector beam. Similarly, Raman scattering intensity also improved under continuous wave excitation of radial vector beam.
Article
Chemistry, Physical
Mariia Ivanchenko, Vida Nooshnab, Alline F. Myers, Nicolas Large, Andrew J. Evangelista, Hao Jing
Summary: Researchers prepared colloidal monodisperse eccentric dual plasmonic noble metal-nonstoichiometric copper chalcogenide (Au@Cu2-xSe) hybrid hetero-nanostructures with controllable semiconductor shell size and two tunable localized surface plasmon resonances (LSPRs). The experimental and computational results demonstrated the superior catalytic activity and higher rate constants of Au@Cu2-xSe in photocatalysis, attributed to the enhanced electromagnetic field strength arising from efficient plasmonic coupling under the excitation of two LSPRs.
Article
Physics, Multidisciplinary
Yongqiang Kang, Peng Gao, Hongmei Liu, Lishuo Gao
Summary: A polarization-insensitive dual-band plasmonic metamaterial absorber is proposed in this study, which achieves two absorption peaks with over 97% absorbance and nearly perfect absorption for all polarization angles of both TE and TM modes on normal incidence. The second absorption peak, resulting from surface lattice resonance, shows large sensitivity performance and high quality factor, holding significant potential in the application of biosensors and monitoring.
Article
Chemistry, Multidisciplinary
Amr M. Mahros, Yara Alharbi
Summary: In this paper, the characteristics of a plasmonic metamaterial absorber based on a metal-insulator-metal functional stack are presented and explored. The impact of modifying nano-hole and embedded disc diameters on the absorber's performance is investigated. The proposed absorber structure shows high absorption rate and short circuit current density, and can be tailored to absorption spectra.
Article
Optics
Tian Xia, Shubo Cheng, Shaohua Tao, Weixing Yu
Article
Optics
Hui Chen, Zhengquan He, Zaikun Zhang, Yi Geng, Weixing Yu
Article
Engineering, Environmental
Chi Chung Tsoi, Xiaowen Huang, Polly H. M. Leung, Ning Wang, Weixing Yu, Yanwei Jia, Zhaohui Li, Xuming Zhang
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Optics
Huangrong Xu, Yuanjie Zhang, Dengshan Wu, Geng Zhang, Ziyuan Wang, Xiangpeng Feng, Bingliang Hu, Weixing Yu
Article
Optics
Yuanyuan Wang, Chengyong Shi, Huangrong Xu, Yuanjie Zhang, Weixing Yu
Summary: A bionic compound eye camera is developed by 3-D printing technology, with a hemispherical surface for mounting compound lens array and an optical relay system to integrate with a CMOS imaging sensor. The optical relay system successfully solves the focal plane mismatch problem between the curved compound eye and the CMOS imaging sensor. The compact bionic compound eye imaging system shows great potential and value in military, medical, and engineering applications.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Tian Xia, Shubo Cheng, Weixing Yu, Shaohua Tao
Summary: The study introduces a modified fractal spiral forked plate (MFSFP) that can generate three coplanar optical vortices at multiple focal planes, including two off-axis vortices and one axial vortex. By designing a proper filter, the axial vortex and off-axis vortex can have equal intensity, exhibiting self-similar optical vortices.
Article
Materials Science, Multidisciplinary
Tian Xia, Shubo Cheng, Weixing Yu, Shaohua Tao
Summary: The study proposes a modified spiral petal-like zone plate (MSPZP) to generate polygon-like beams with tailorable shape, size, and topological charge. By adjusting different parameters, the shape, size, and topological charge of the polygon-like beam can be customized, demonstrating high flexibility in beam generation.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Xiaojun Zhou, Aiguo Song, Depeng Kong, Weixing Yu
Summary: This study proposes a method for fabricating precise high-efficiency 2D multi-mode fiber array coupler, which can achieve an average coupling efficiency of 57.51% by improving the design and coupling with a microlens array. It demonstrates the potential of this coupler in various applications such as LIDAR, optical communication systems, and microwave photonics systems.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Optics
Yuanjie Zhang, Huangrong Xu, Quan Guo, Dengshan Wu, Weixing Yu
Summary: A prototype of a biomimetic multispectral curved compound eye camera (BMCCEC) was developed, demonstrating real-time multispectral imaging on multiple targets with an ultra-large field of view.
Article
Optics
Chenyang Li, Qifa Wang, Hang Diao, Zhen Hao, Weixing Yu, Kaihui Liu, Xuetao Gan, Fajun Xiao, Jianlin Zhao
Summary: Two-dimensional transition metal dichalcogenides show remarkable optical properties, but face limitations in electronics and photonics due to low absorption and emission rates. By integrating monolayer MoSe2 into an Ag nanowire-on-mirror nanocavity, photoluminescence (PL) enhancement is achieved through Fano resonance. The nanocavity with multiple resonances enables spatial mode overlap, resonantly enhancing absorption and PL quantum yield. The combination of Fano resonance and mode matching leads to over 1800-fold PL enhancement, offering a promising approach for highly efficient optoelectronic devices.
LASER & PHOTONICS REVIEWS
(2022)
Article
Engineering, Electrical & Electronic
Tian Xia, Shubo Cheng, Weixing Yu, Wenke Xie, Shaohua Tao
Summary: A polygon-like light-arm zone plate (PLZP) is proposed to generate polygon-like light-arm beams, where the arms can be identified clearly by using the appropriate transverse azimuthal shift phi. The proposed zone plates can be used to trap particles into different shapes and are applicable for optical communication.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Optics
Tian Xia, Shubo Cheng, Weixing Yu, Shaohua Tao
Summary: A modified generalized composite kinoform Fibonacci lens (MGCKFiL) is proposed to produce two foci with the same resolution and long focal depths. The phase generated by the weighted Gerchberg-Saxton algorithm expands the focal depths of two foci for the MGCKFiL.
OPTICS AND LASER TECHNOLOGY
(2022)
Proceedings Paper
Optics
Jinheng Liu, Yuanjie Zhang, Huangrong Xu, Weixing Yu
Summary: In this study, a bionic curved compound-eye camera (BCCEC) was analyzed for its potential in 3D detection through detailed examination of overlapping field of view (FOV) among the ommatidia and design of a new experiment. Results showed that more than 95% of FOV can be reconstructed in 3D when object distance exceeds 32 cm. Furthermore, an addressing algorithm and a new 3D detection experiment were proposed to achieve automatic calibration of all ommatidia, demonstrating the capability of BCCEC to obtain multi-dimensional information with high application potential in obstacle avoidance and navigation.
AOPC 2021: OPTICAL SENSING AND IMAGING TECHNOLOGY
(2021)
Article
Spectroscopy
Liu Chen-yang, Xu Huang-rong, Duan Feng, Wang Tai-sheng, Lu Zhen-wu, Yu Wei-xing
Summary: The study used the rabbit liver VX2 tumor model for spectral detection and classified the tissues into two and four categories using support vector machine, achieving classification accuracy rates of over 99%. The results showed that the genetic algorithm was more accurate in classifying the four categories.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2021)
Article
Optics
Xu Huangrong, Liu Jinheng, Zhang Yuanjie, Wu Dengshan, Fan Hao, Feng Xiangpeng, Zhang Geng, Hu Bingliang, Yu Weixing
Summary: Based on the visual advantages of biomimetic compound eye, a biomimetic curved compound-eye is applied to an unmanned aerial vehicle-borne photoelectric detection system for high-resolution detection and velocity measurement of moving objects. The system design includes a lens array on a hexagon curved surface, an optical relay subsystem, and a CMOS image sensor, achieving a wide field-of-view and high-resolution imaging. The proposed velocity measurement method improves the reliability and accuracy of testing moving targets.
ACTA PHOTONICA SINICA
(2021)
