Article
Chemistry, Multidisciplinary
Jiacheng Yao, Hui Fang, Yong Li, Ze Liu, Hongxing Xu, Tao Ding
Summary: In this study, single-crystalline aluminum nanowires with high stability were fabricated using a superplastic nanomolding technique. These nanowires exhibit multimode waveguiding, efficient beam splitting based on polarization, and durable thermal optical modulation, making them suitable for nanophotonic routers, splitters, and information encryptors. This technique can also be extended to other metals, enhancing the development of functional nanophotonic devices and integrated optical chips.
Article
Nanoscience & Nanotechnology
T. P. Rasmussen, P. A. D. Goncalves, Sanshui Xiao, Sebastian Hofferberth, N. Asger Mortensen, Joel D. Cox
Summary: By bending 2D materials into parabolic shapes to form waveguides, the field confinement associated with graphene plasmons can be significantly increased, leading to the formation of plasmonic waveguides. In 2D parabolic waveguides, the high field confinement of channel polaritons can enhance the spontaneous emission rate of quantum emitters near the parabolic vertex.
Article
Physics, Applied
Zijian Zhang, Yuanzhen Li, Chi Wang, Su Xu, Zuojia Wang, Erping Li, Hongsheng Chen, Fei Gao
Summary: This article introduces a method for generating dispersion-tunable photonic topological waveguides without increasing material loss. The dispersion is tuned by changing the structure, and the experimental results validate the theoretical model.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Anton Zyapkov, Atanas Tzonev
Summary: In this study, silver nanowires were embedded in a polymer waveguide doped with Rhodamine 6 G. The waveguides were constructed using electron beam lithography. The results showed a significant gain in the polymer waveguide and an increase in the intensity of scattered plasmons by pumping Rhodamine at the end of the nanowire.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Jin Wang, Qian Yi Shi, Ya Jie Liu, Hui Yuan Dong, Kin Hung Fung, Zheng-Gao Dong
Summary: The study introduces a method to stop the propagation of guided surface magneto-plasmons in a non-reciprocal graded waveguide system, with the ability to finely adjust the stopping location using an external static magnetic field, showing potential for fast modulation of wave harvesting and energy concentration through external magnetic field.
Article
Optics
Michael Gehl, William Kindel, Nicholas Karl, Adrian Orozco, Katherine Musick, Douglas Trotter, Christina Dallo, Andrew Starbuck, Andrew Leenheer, Christopher DeRose, Grant Biedermann, Yuan-Yu Jau, Jongmin Lee
Summary: The study presents an optical waveguide device capable of trapping a single atom or cold atom ensemble with high, invacuum, optical power. Utilizing suspended membrane waveguides, optical powers ranging from 6 mW to nearly 30 mW have been successfully managed. The platform is compatible with laser cooling and magneto-optical traps, with two novel designs for critical thermal management features.
Article
Engineering, Electrical & Electronic
Santosh Kumar Sahu, Samyuktha K. Reddy, Mandeep Singh, Eugene Avrutin
Summary: In this work, a nanoscale 3D hybrid plasmonic waveguide (HPWG) refractive index-cum-temperature sensor was proposed and simulated. It can be used for sensing the refractive index and temperature of aqueous analytes. Numerical simulations were performed to predict the sensitivity of the device, and the sensor was shown to be suitable for next-generation on-chip biochemical sensing applications.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Shang-Jie Yu, Helen Yao, Guangwei Hu, Yue Jiang, Xiaolin Zheng, Shanhui Fan, Tony F. Heinz, Jonathan A. Fan
Summary: This study presents hyperbolic polaritonic rulers based on low-dimensional, strongly anisotropic nanomaterials, which exhibit near-field polaritonic characteristics that are highly sensitive to device geometry. Using scanning near-field optical microscopy, the researchers demonstrate the strongly confined image polariton modes supported by these rulers and describe and predict their behavior using a simple analytic model.
Article
Optics
Mohsen Samadi, Pooya Alibeigloo, Abolfazl Aqhili, Mohammad Ali Khosravi, Farahnaz Saeidi, Shoaib Vasini, Mostafa Ghorbanzadeh, Sara Darbari, Mohammad Kazem Moravvej-Farshi
Summary: Plasmonic tweezers are indispensable tools for manipulating micro and nano-objects with high precision, utilizing surface plasmon technology to trap particles beyond the diffraction limit. Trapping-potential landscape can be reconfigured by designing plasmonic nanostructures.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Timothy J. Palinski, Brian E. Vyhnalek, Gary W. Hunter, Amogha Tadimety, John X. J. Zhang
Summary: This study demonstrates a platform for the active switching of hybrid plasmonic-photonic Fano resonances, achieving on/off switching of narrow Fano resonance transparency windows with high contrast and tunability across a wide spectral range by modulating refractive index. The structure includes gold nanogratings sandwiched between two dielectric thin films, and controlling the interaction of substrate and superstrate modes through refractive index tuning enables both spectral and spatial selectivity.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Optics
Victor Pacheco-Pena, Toby Hallam, Noel Healy
Summary: MXenes, as an emerging class of two-dimensional materials, show significant potential for use in next generation optoelectronic sensors. By tuning the plasma frequencies, they can produce plasmon resonances across different spectral ranges, adding a degree of freedom to the sensing mechanism.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Optics
D. Chatzitheocharis, D. Ketzaki, G. Patsamanis, E. Chatzianagnostou, K. Vyrsokinos
Summary: This paper presents a thorough simulation-based analysis for the design of multi-step couplers bridging seamlessly plasmonic barium titanate oxide (BTO) ferroelectric phase shifters and thick silicon nitride (Si3N4) waveguides for the O-band. The proposed plasmonic platforms are formed by CMOS-compatible Copper (Cu) material and include hybrid plasmonic waveguides (HPW) and plasmonic metal-insulator-metal (MIM) slot waveguides. Numerical simulations are conducted to identify the optimum geometries, resulting in coupling losses of 1.75dB for the HPW geometry and 1.29dB for the MIM configuration, with confinement factors of 31.39% and 56.2%, respectively.
Article
Engineering, Electrical & Electronic
Iddrisu Danlard, Emmanuel Kofi Akowuah
Summary: The new quasi D-shaped plasmonic photonic crystal fiber microsensor with dual polarization enables simultaneous measurement of refractive index and temperature with high sensitivity and resolution. By incorporating special materials and design within the fiber structure, effective multiparameter sensing is achieved, with potential applications in various fields.
IEEE SENSORS JOURNAL
(2021)
Review
Materials Science, Multidisciplinary
Xuanru Zhang, Wen Yi Cui, Yi Lei, Xin Zheng, Jingjing Zhang, Tie Jun Cui
Summary: Localized surface plasmons (LSPs) in metal nanoparticles are highly sensitive to the dielectric environment, making them ideal sensors. The concept has expanded to spoof LSPs in microwave and terahertz frequencies, offering deep-subwavelength confinement and sensitivity enhancement with low loss. Advances in technology have enabled applications in various fields such as liquid sensing, gas sensing, and wearable sensing.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Review
Optics
Yuxi Fang, Changjing Bao, Si-Ao Li, Zhi Wang, Wenpu Geng, Yingning Wang, Xu Han, Jicong Jiang, Weigang Zhang, Zhongqi Pan, Zhaohui Li, Yang Yue
Summary: Supercontinuum (SC) has wide applications in optical communications, signal processing, metrology, and spectroscopy. This paper reviews the latest progress on various nanophotonic waveguides for Supercontinuum generation (SCG), including the discussion of different materials and their properties, the consideration of waveguide properties, and the analysis of different broadening mechanisms. It also provides perspectives on the spectral coverage, dispersion curves, and novel materials for SCG in nanophotonic waveguides.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Zekun Lin, Shaolin Ke, Xuefeng Zhu, Xun Li
Summary: The study investigated the topological skin effect in a ring resonator array which can be mapped into the square root of a Su-Schrieffer-Heeger (SSH) model with non-Hermitian asymmetric coupling. The square-root topological insulator inherits properties from its parent Hamiltonian, supports multiple topological edge modes, and doubles the number of band gaps compared to the original Hamiltonian. The study provides a promising approach to investigate the skin effect using ring resonators.
Article
Engineering, Electrical & Electronic
Xianye Li, Yafei Sun, Yikang He, Xun Li, Baoqing Sun
Summary: A novel QPI scheme inspired by single-pixel camera (SPC) is proposed in this work, utilizing structured illumination and single-pixel signals for image reconstruction without prior information of the targets. The scheme exhibits great performance even with objects in an extremely rough phase distribution in both simulation and experiment.
Article
Engineering, Electrical & Electronic
Lei Xin, Jia Zhao, Xun Li
Summary: We propose a new fiber-optic communication system scheme that uses frequency modulation non-coherent detection to suppress mode partition noise. The use of an optical slope filter reduces noise, and our simulation results show that this system has longer transmission distances compared to conventional systems.
IEEE PHOTONICS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Yulan Zhou, Jia Zhao, Xun Li
Summary: A novel photodetector with enhanced sensitivity through grating assistance has been proposed in this study, achieving high sensitivity at high speeds. For systems with data rates exceeding 40 Gbps, the performance of this photodetector is superior to traditional semiconductor optical amplifiers and avalanche photodiodes.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Xuetong Zhou, Hon Ki Tsang
Summary: We propose a new approach to increase the coupling efficiency of waveguide grating couplers by introducing an optimized shift-patterned polysilicon overlay. The composite subwavelength structures formed by the polysilicon overlay and silicon grating improve the mode matching and directionality of the grating coupler, resulting in a high-efficiency perfectly vertical grating coupler with -0.91 dB simulated coupling efficiency. The devices are fabricated using photolithography and have a measured coupling loss of approximately 1.45 dB.
Article
Engineering, Electrical & Electronic
Xuetong Zhou, Hon Ki Tsang
Summary: This paper describes a novel high coupling efficiency multimode waveguide grating coupler that utilizes a polysilicon overlay to optimize the directivity and mode-matching for different modes. Experimental results show significant improvement over previous designs and suggest potential applications in silicon photonic transceivers for mode-division multiplexed communications in multimode fibers.
IEEE PHOTONICS JOURNAL
(2022)
Article
Multidisciplinary Sciences
Yaojing Zhang, Keyi Zhong, Xuetong Zhou, Hon Ki Tsang
Summary: The authors demonstrate a new approach to maintain high-quality-factor resonances using detuning in concentric racetrack resonators. By implementing a broadband pulley directional coupler and concentric racetracks, they achieved a broadband high-Q multimode silicon resonator. This resonator was then used to demonstrate a broadly tunable Raman silicon laser.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Xuetong Zhou, Gaolei Hu, Yue Qin, Hon Ki Tsang
Summary: In this study, a novel approach for designing a polarization-independent waveguide grating coupler is proposed and validated. By optimizing a polysilicon overlay on a silicon grating structure, the simulated and measured results show high coupling efficiencies for both TE and TM polarizations.
Article
Engineering, Electrical & Electronic
Xuetong Zhou, Hon Ki Tsang
Summary: Using an optimized shift-pattern overlay method, a new high-efficiency silicon waveguide grating coupler operating at 1550 nm center wavelength was developed. The simulation predicted a coupling loss of 0.68 dB, and the experimentally measured loss was 0.89 dB. This achievement was obtained without the need for substrate bottom mirrors or electron beam lithography, using standard processes from a commercial foundry's multi-project wafer fabrication service.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
Xuetong Zhou, Hon Ki Tsang
Summary: We propose a novel design for a dual-wavelength-band waveguide grating coupler that works in both the C band and O band. The device is optimized from an initial design of two independent gratings formed on the silicon and polysilicon overlay layers. After numerical optimization using a genetic algorithm, the grating coupler achieves a coupling efficiency of -3.86 dB at the C band and -4.46 dB at the O band. Experimental validation using 193-nm photolithography in a multi-project wafer shows coupling efficiencies of -4.37 dB in the C band and -5.8 dB in the O band.
Article
Nanoscience & Nanotechnology
Yuan Li, Zunyue Zhang, Yi Wang, Yue Yu, Xuetong Zhou, Hon Ki Tsang, Xiankai Sun
Summary: A novel integrated photonic network was proposed and experimentally demonstrated to achieve high-resolution spectral reconstruction in a miniaturized spectrometer.
Article
Optics
Xuetong Zhou, Ying Xue, Fan Ye, Ziyao Feng, Yuan Li, Xiankai Sun, Kei May Lau, Hon Ki Tsang
Summary: We propose and validate a new approach for high coupling efficiency (CE) grating couplers (GCs) in the lithium niobate on insulator photonic integration platform. Enhanced CE is achieved by increasing the grating strength using a high refractive index polysilicon layer on the GC. The optical cavity formed in the vertical direction enhances the CE of the waveguide GC, and simulations predict a CE of -1.40 dB while the experimentally measured CE is -2.20 dB with a 3-dB bandwidth of 81 nm from 1592 nm to 1673 nm. The high CE GC is achieved without using bottom metal reflectors or requiring the etching of the lithium niobate material.
Article
Multidisciplinary Sciences
Yun Zheng, Chonghao Zhai, Dajian Liu, Jun Mao, Xiaojiong Chen, Tianxiang Dai, Jieshan Huang, Jueming Bao, Zhaorong Fu, Yeyu Tong, Xuetong Zhou, Yan Yang, Bo Tang, Zhihua Li, Yan Li, Qihuang Gong, Hon Ki Tsang, Daoxin Dai, Jianwei Wang
Summary: This study demonstrates a multichip multidimensional quantum entanglement network based on integrated-nanophotonic quantum node chips. Multiple multidimensional entangled states can be distributed across multiple chips using hybrid multiplexing and few-mode fibers. The study also developed a technique for efficiently retrieving multidimensional entanglement in complex-medium quantum channels.
Article
Engineering, Electrical & Electronic
Jiewen Chi, Xun Li, Chuanning Niu, Jia Zhao
Summary: This study proposes an optimized asymmetric structure for PPM DFB lasers, which offsets the waveform distortion and bandwidth cutoff caused by imbalanced push-pull modulation through asymmetric facet coating and asymmetric section length design. Simulation results show that this optimized structure can improve power efficiency and maintain a smooth modulation bandwidth.
IEEE PHOTONICS JOURNAL
(2023)
Article
Optics
Zekun Lin, Lu Ding, Shuyue Chen, Shan Li, Shaolin Ke, Xun Li, Bing Wang
Summary: Investigated second-order topological phases in a two-dimensional ring resonator array where the system supports topological corner modes determined by non-Bloch topological invariants. Bulk modes accumulate in opposite corners depending on clockwise or counterclockwise excitation, with the introduction of an interface with different imaginary gauge fields showing bulk modes at the interface and topological corner modes localized at physical corners. Skin effects also observed in passive ring resonators, with potential applications in lasers and broadband light trapping.
