Article
Chemistry, Physical
Zicheng Lu, Hong Zhou, Yi Wang, Yanxiang Liu, Tie Li
Summary: Silicon nanowire field-effect transistor (SiNW-FET) sensors have the capability of rapid, real-time, and label-free detection of charged molecules with high sensitivity and selectivity. By a combination of horizontal and vertical control, a novel fabrication approach for silicon nanowires has been developed, resulting in improved device uniformity and lower current fluctuation. The new approach shows a more accurate bio-analysis application of the silicon nanowire sensor.
Article
Optics
Zan Hui Chen, Weicheng Chen, Tarun Sharma, Zhenzhou Cheng, Guo-Wei Lu, Jiaqi Wang
Summary: In this study, an ultra-broadband digital meta-structure waveguide bend device is proposed and designed based on topological optimization using a genetic algorithm. This design enables low optical losses light routing within a micro-sized region.
Article
Engineering, Multidisciplinary
Ting Li, Pei Yuan, Shufeng Li, Ke Li, Lianqing Zhu
Summary: Fiber Bragg grating (FBG) interrogator is a scientific instrument that indirectly monitors physical quantities by detecting the center wavelength of FBG. An arrayed waveguide grating (AWG), a fundamental part of the FBG interrogation system, is designed and fabricated for a photonic integrated FBG interrogation system with 12 channels, a 3 dB bandwidth of 2.23 nm, insertion loss of less than 5 dB, and crosstalk of -16.64 dB. The AWG has a wavelength resolution of 8 pm and a wavelength accuracy of 10.59 pm in the dynamic range of 0.8 nm, making it suitable for FBG interrogation systems.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Rupalin Nanda, Ramakrushna Rath, Sandip Swarnakar, Santosh Kumar
Summary: This paper proposes, analyzes, and verifies the performance of an optimized plasmonic 10-dB directional coupler and a 3-dB directional coupler in 2-D plasmonic waveguides using the FDTD method. The proposed couplers feature good energy confinement, compact size, and low propagation loss, making them potentially useful in photonic integrated devices, optical signal processors, and other all-optical switching devices.
Article
Chemistry, Analytical
Andrei Tsarev
Summary: The concept of bimodal sensors, utilizing inter-mode interaction of guided optical waves in a two-mode optical waveguide, is proposed in this paper. By leveraging dispersion properties, it is shown that these sensors can achieve extremely high sensitivity, surpassing that of sensors in single-mode waveguide structures.
Article
Nanoscience & Nanotechnology
Shufeng Li, Pei Yuan, Ting Li, Ke Li, Lianqing Zhu
Summary: This article presents a 15-channel 400 GHz AWG based on silicon on insulator (SOI) substrate, which has good spectral characteristics and can be used as a spectral device in the fiber Bragg grating (FBG) interrogation system.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Siming Weng, Pei Yuan, Lidan Lu, Dongliang Zhang, Lianqing Zhu
Summary: In this study, a novel silicon-based AWG was designed and fabricated as a critical component for fiber Bragg grating interrogation systems. By modifying the input waveguide with an MMI coupler, the AWG achieved higher demodulation precision and wider dynamic range. The optimized AWG exhibited excellent performance with low crosstalk, wide dynamic range, and high resolution, showing great potential for fiber Bragg grating interrogation.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Salah Eddine Achi, Abdesselam Hocini
Summary: This study proposes a highly refractive index sensor based on Fano resonances in a metal-insulator-metal waveguide with a Nano-wall side-coupled to an eye-like resonator with a rectangular defect and two slots. The Fano resonance originates from the coherent coupling and interference between the discrete and continuous states. The proposed design shows a different profile compared to Lorentzian resonance profile, which is typically asymmetric and sharp.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Shuo Yuan, Jijun Feng, Zhiheng Yu, Jian Chen, Haipeng Liu, Yishu Chen, Song Guo, Fengli Huang, Ryoichi Akimoto, Heping Zeng
Summary: This article proposes a silicon nanowire-assisted AWG structure that achieves high uniformity and low insertion loss. By comparing the effect of nanowire number and shape, it is found that double nanowires provide the best performance. Compared to conventional 8- and 16-channel AWGs, the presented structure significantly improves non-uniformity without increasing size.
Article
Optics
Tarun Sharma, Vaibhav Rana, Jiaqi Wang, Zhenzhou Cheng, Yuzhi Chen, Youfu Geng, Xueming Hong, Xuejin Li, Kyoungsik Yu, Brajesh Kumar Kaushik
Summary: A grating-based narrowband wavelength selective reflector on silicon on insulator waveguide is proposed, which achieves a reflection of 96% with a full-width half maximum bandwidth of 1.5 nm at 1550 nm wavelengths by optimizing the dutycycle, grating-period, and side etching depth.
Article
Energy & Fuels
Suneet Kumar Agnihotri, D. Prashant, D. P. Samajdar
Summary: This paper investigates the optical and electrical behavior of three different nanostructure geometries in InP solar cells and proposes a hybrid hexagonal pyramidal nanowire structure with better absorption and higher conversion efficiency. Simulation and electrical analysis show that the proposed structure outperforms the other two structures in terms of generation rate and power conversion efficiency.
Article
Engineering, Electrical & Electronic
Lida Xu, Linchun Gao, Tao Ni, Juanjuan Wang, Zewen Cao, Yifan Li, Xueqin Li, Runjian Wang, Xiaojing Li, Weiwei Yan, Jianhui Bu, Duoli Li, Chuanbin Zeng, Bo Li, Jiajun Luo
Summary: By studying the stability of electrical characteristics of FDSOI and PDSOI in different temperature ranges, a new semiconductor parameter-temperature-increment (SPTI) model is proposed, which clarifies the influence of high-temperature electrical parameters on the stability of the two devices and helps understand their differences. Additionally, the SPTI model can be used to determine the design domain of electrical characteristics and achieve a compromise method to improve the electrical performance and stability of the devices.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Optics
Bogdan-Petrin Ratiu, Balthazar Temu, Cristian Messina, Oumaima Abouzaid, Samir Rihani, Graham Berry, Sang Soon Oh, Qiang Li Li
Summary: Catalyst-free, selective nano-epitaxy of III-V nanowires provides an excellent materials platform for designing and fabricating ultra-compact, bottom-up photonic crystal lasers. In this study, we introduce a new type of photonic crystal laser with a curved cavity formed by InGaAs nanowires grown directly on silicon-on-insulator. The effect of the radius of the curved cavity on the emission wavelength, quality factor, and laser beam emission angle is investigated. The experimentally demonstrated device exhibits a lasing threshold of 157 mu J/cm2 at room temperature at telecom O-band wavelengths.
Article
Optics
Junhu Zhou, Jie You, Hao Ouyang, Runlin Miao, Xiang'ai Cheng, Tian Jiang
Summary: This study presents a theoretical analysis of a novel multi-channel light amplification photonic system on chip, utilizing the nonlinear Raman amplification phenomenon in silicon wire waveguides and a temperature insensitive Mach-Zehnder interferometer filter as demultiplexer. The system incorporates various optical effects to achieve thermal robustness and prevent thermal interference, showing promising potential for future applications.
CHINESE OPTICS LETTERS
(2022)
Article
Optics
Lichao Zhang, Jiamin Chen, Weichao Ma, Guangyuan Chen, Ruoming Li, Wangzhe Li, Junming An, Jiashun Zhang, Yue Wang, Guangyang Gou, Chunxiu Liu, Zhimei Qi, Ning Xue
Summary: This paper introduces four basic bending methods and proposes an n-adjustable (NA) bend that can achieve lower losses compared to other basic bends by adjusting n values. The circular bend and Euler bend are special cases of the proposed NA bend. The proposed bend shows promise as a candidate for low-loss compact photonic integrated circuits.
Article
Chemistry, Multidisciplinary
Nan Wang, Julian S. Evans, Jianhao Zhang, Chenxi Li, Sailing He
Summary: In a liquid crystal emulsion, chemically different guest phases reside in the topological disclinations of the host phase. These disclinations act as effective capillaries, leading to various meniscus and droplet phenomena. This demonstrates that anisotropic forces associated with liquid crystal molecules play a critical role in determining the shape and properties of a phase boundary.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Article
Optics
Ruilin Chen, Ji DU, Yuan Wang, Chao Fei, Tianyi Zhang, Jiahan Tian, Guowu Zhang, Xiaojian Hong, Sailing He
Summary: This article introduces a blue-LED-based underwater wireless optical communication (UWOC) system that achieves real-time discrete Fourier transform spread discrete multi-tone (DFT-S DMT) signal transmission with a data rate of up to 30 Mbps over a 15-meter underwater channel. The article analyzes and discusses the architecture, usage of on-chip resources, and power consumption of the system. It also introduces spatial diversity reception to reduce the effects of multipath fading and received intensity fluctuation. The system utilizes Reed-Solomon (RS) codes and achieves error-free transmission of images over the underwater channel, demonstrating its potential in underwater applications.
Article
Engineering, Electrical & Electronic
Xiaogang Jiang, Haoling Yang, Xuan Liu, Daru Chen, Sailing He
Summary: A novel chalcogenide As2Se3 fiber with a twin-tube structure is proposed and studied for mid-infrared single-polarization single-mode operation. The fiber exhibits excellent confinement properties and a wide wavelength range, making it suitable for MIR photonics and nonlinear fiber optics.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Qiyun Lei, Zhonglin Luo, Xinyi Zheng, Na Lu, Yiming Zhang, Jianfeng Huang, Liu Yang, Shiming Gao, Yiyong Liang, Sailing He
Summary: This study presents a broadband transparent and flexible silver (Ag) mesh for efficient electromagnetic interference (EMI) shielding and high-quality free-space optical (FSO) communication in the X band. The Ag mesh demonstrates high transmission and low sheet resistance, achieving a high average EMI shielding effectiveness (SE) in the X band. The FSO communication benefits from the high optical transmittance and low haze, and it remains unaffected by chemical corrosions and bending cycles.
OPTICAL MATERIALS EXPRESS
(2023)
Review
Plant Sciences
Xiaotong Jiang, Berkley J. Walker, Sheng Yang He, Jianping Hu
Summary: Plants have a sophisticated immune system that coordinates with other biological and metabolic pathways to defend against biotic stresses. Photorespiration, a byproduct pathway of photosynthesis, is involved in defense responses and impacts the homeostasis of hydrogen peroxide, a crucial signaling molecule in plant immunity. Understanding the relationship between plant immunity and photorespiration is important for crop engineering to enhance photosynthesis without compromising plant immunity.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Physics, Applied
Yan Huang, Tie Zhang, Gao-Xuan Wang, Yu-Xin Xing, Sai-Ling He
Summary: A multi-gas sensing system based on wavelength-modulated differential photoacoustic spectroscopy was developed for simultaneous measurement of acetone and methane. It accurately assesses the concentration of acetone and methane, which is crucial for medical diagnosis purposes.
APPLIED PHYSICS LETTERS
(2023)
Article
Instruments & Instrumentation
Haolin Yang, Sailing He
Summary: Here, a high power dissipative soliton (DS) laser with a central wavelength of -1612 nm is proposed for applications in biomedical research and material processing. The study observes the automatic evolution of the DS pulses into noise-like (NL) pulses under high pumping strength, and achieves an output power of over 2W through the optimization of the amplifier system.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Yuan Wang, Chao Fei, Ji Du, Tianyi Zhang, Jiahan Tian, Ruilin Chen, Junwei Zhang, Guowu Zhang, Xiaojian Hong, Sailing He
Summary: This article proposes a novel spectrally efficient non-orthogonal discrete multi-tone (NODMT) system for underwater wireless optical communication to compensate for insufficient bandwidth. By using a real-valued correlation matrix, the complexity of decoders can be reduced. A new algorithm based on QR decomposition is proposed to effectively solve the issue of insufficient decoding capability in higher spectrum efficiency scenarios. Through experiments, the feasibility and effectiveness of the proposed algorithm are verified.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Zhenchao Liu, Tingbiao Guo, Qin Tan, Zhipeng Hu, Yuwei Sun, Houxin Fan, Zhi Zhang, Yi Jin, Sailing He
Summary: For the first time, an all-dielectric BIC metasurface is used for highly sensitive phase interrogation refractive index sensing. The proposed sensor achieves high performance and a high figure of merit, rivaling metal-based sensors. This scheme plays a pivotal role in the field of ultrahigh sensitivity sensors and opens possibilities for trace detection in biochemical analysis and environment monitoring.
Article
Optics
Qin Tan, Shengnan Wu, Zhenchao Liu, Xiaolu Chen, Sailing He
Summary: A compact label-free optofluidic sensor based on a polished hollow core Bragg fiber (HCBF) was proposed, which can simultaneously measure cortisol concentration and surrounding temperature in real-time. The sensor consists of fusion splicing single mode fiber (SMF), multimode fiber (MMF), and HCBF. By taking advantage of the high refractive index (RI) layers of HCBF, the sensor offers high sensitivity and specific sensing of cortisol with a limit of detection (LOD) of 4.303 pM. The sensor has a compact structure, enables temperature compensation, and is suitable for in-situ monitoring and high-precision sensing of cortisol and other biological analytes.
Article
Engineering, Electrical & Electronic
Jiahan Tian, Tingbiao Guo, Nan He, Ji Du, Qiangsheng Huang, Xiaojian Hong, Chao Fei, Yuan Wang, Tianyi Zhang, Junping Zhang, Sailing He
Summary: Modulating retro-reflector (MRR) free-space optical (FSO) communication technology is crucial for small-sized optical links and holds promise for application in small platforms. In this article, a wide field-of-view (FOV) MRR using an image space telecentric lens is proposed, and a bidirectional FSO communication system is experimentally demonstrated. The experimental results show that the designed MRR has a FOV of up to 110 degrees, achieving low bit error rates for both downstream and upstream signals.
IEEE PHOTONICS JOURNAL
(2023)
Article
Computer Science, Artificial Intelligence
Junwei Lang, Zhenjia Zeng, Tengfei Ma, Sailing He
Summary: Sudden air pollution accidents in chemical industry parks can cause significant harm to people, property, and the ecological environment. A gas tracking network using traceability technology and distributed sensors can monitor the diffusion of hazardous gases in a timely manner, helping to locate the source of pollutants and control major hazards. However, tracing the source of leaks in a large area, especially within an urban area, remains challenging.
Article
Optics
Zijian Lin, Tingbiao Guo, Xiao Chen, Jiahan Tian, Zhi Zhang, Sailing He
Summary: This paper proposes a new method for spectral imaging, which combines a liquid crystal cell with a commercial color camera. The method achieves high-quality multispectral imaging with a high frame rate and overcomes the tradeoff between spectral resolution and time resolution. The potential application of the method in metamerism recognition is demonstrated.
Article
Computer Science, Information Systems
Dawei Gong, Lingling Yan, Binbin Gu, Ruili Zhang, Xinli Mao, Sailing He
Summary: The study aims to develop a computer-assisted diagnosis system for distinguishing different types of chronic gastritis. By utilizing a novel network model and image analysis methods, the study achieved breakthroughs in high accuracy and minimal parameter requirements.
Article
Engineering, Electrical & Electronic
Zongxing Lin, Sailing He
Summary: In this article, a high-performance polarization beam splitter (PBS) based on a 220-nm SOI platform is proposed and experimentally demonstrated. The proposed PBS utilizes a sub-wavelength grating-assisted adiabatic directional coupler and a simple filter to achieve high separation and low insertion loss for TE and TM modes.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
