Article
Chemistry, Physical
Wanli Luo, Peng Jiang, Qiang Xu, Lei Cao, Adam Jones, Kang Li, Nigel Copner, Yongkang Gong
Summary: A novel POF based on COC with a rectangular porous core is designed for THz sensing, showing ultrahigh sensitivity and low losses under optimum design conditions. This new sensor has potential application value in THz sensing and communication compared to traditional sensors.
Article
Physics, Applied
Ziwei Yuan, Yi Wang, Dexian Yan, Mingxuan Cao, Miao Meng, Xiangjun Li, Shuai Sun
Summary: This study designs a novel double negative curvature nested fiber structure by adding extra circular cladding tubes to enhance the birefringence and reduce the confinement loss. The results show that the fiber structure has high birefringence and low confinement loss in the frequency range of 1.75-2.6 THz.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Mario Zitelli, Mario Ferraro, Fabio Mangini, Stefan Wabnitz
Summary: A new semi-analytical model is proposed to describe the evolution of pulse bandwidth in dispersion managed transmission systems using multimodal and monomodal graded-index fibers. The model is compared with direct integration of the nonlinear Schrodinger equation and experimental results, showing the detrimental effects of dispersion and self-phase modulation interaction at high pulse powers. Promising results are found for spatio-temporal DM solitons in parabolic GRIN fibers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Md Hedayatullah Maktoomi, Soheil Saadat, Omeed Momeni, Payam Heydari, Hamidreza Aghasi
Summary: This paper provides an overview of broadband terahertz antenna elements and arrays for integrated communication systems. The challenges and trade-offs of on-chip and off-chip antenna design, as well as the impact of chip-off-chip antenna interface, are studied. Various interface technologies are discussed, and the deployment of PCB and FPC technologies for efficient broadband antennas is compared with on-chip counterparts. An off-chip antenna for the 91-134 GHz band is presented as a proof of concept.
Article
Optics
Huicong Li, Wentao Zhang, Wenzhu Huang, Yanliang Du
Summary: A low frequency fiber Fabry-Perot seismometer was developed based on transfer function analysis, with experimental results showing its noise level below 50 Hz is lower than that of the global new high noise model.
CHINESE OPTICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Atsushi Kanno
Summary: This article introduces the application of radio-over-fiber technology in the conversion between terahertz radio and optical fiber communication systems, and investigates the oscillator configuration of terahertz transceivers using photonics. The geographical challenges of integrating fixed wireless terahertz radio systems under severe weather conditions are also discussed.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Kunimasa Saitoh
Summary: This paper describes the coupling mechanisms and design issues in multi-core fibers (MCFs) for space division multiplexing. For uncoupled MCFs, a design procedure considering random structural perturbations, correlation length, and birefringence beat length on inter-core crosstalk is presented based on coupled mode theory. Furthermore, for coupled MCFs, a numerical estimation method for modal dispersion is described, along with a method to enhance random mode mixing.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Ce Bian, Minxuan Li, Wei Cao, Manli Hu, Zhiqin Chu, Ruohui Wang
Summary: In this study, a robust method for integrating nanodiamonds with nitrogen-vacancy (NV) centers into optical fiber was developed and experimentally demonstrated for all-optical thermometry application. The efficiency of NV fluorescence can be enhanced by adjusting the thickness of UV adhesive film and additional aluminum film deposition, paving the way for developing fiber-based quantum thermometry and magnetometry.
CHINESE OPTICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Jian Zhou, Haowei Xu, Yongliang Shi, Ju Li
Summary: This study demonstrates how terahertz light can drive ultrafast topological phase transitions in monolayer TMDs by modulating the Gibbs free energy landscape under light. The reversible phase transitions between different stable phases with small energy barriers enable applications in high-resolution fast data storage and in-memory computing.
Article
Chemistry, Multidisciplinary
Michael R. Bergman, Sophia A. Hernandez, Caitlin Deffler, Jingjie Yeo, Leila F. Deravi
Summary: This study investigates the role and interactions of crystallins in the lens and their impact on transparency. By studying crystallin combinations and properties, it was found that beta-crystallins play a crucial role in maintaining lens transparency. These findings contribute to the design of new transparent materials and enhance understanding of transparency regulation mechanisms.
Article
Engineering, Multidisciplinary
Lei Zhang, Wanli Luo, Jing Bai, Haiping Bai, Peng Jiang, Qiang Xu, Kang Li, Nigel Copner, Yongkang Gong
Summary: The paper presents a newly developed microarray-core based polymer optical fiber with flattened dispersion and ultra-low losses. Through simulation, the fiber is found to have near-zero dispersion, high birefringence, ultra-low confinement loss, effective mode field zone, and nonlinear coefficient. The fiber shows potential applications in ethanol detection and polarization maintaining THz applications.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Optics
Y. Chen, J. Hammer, N. Y. Joly, P. St J. Russell
Summary: The study presents a design for efficiently generating entangled photon triplets by adjusting gas pressure, axial strain, and mechanical twist. The nanostrand of glass with two hollow channels enhances the nonlinear overlap between the fundamental and third harmonic modal fields.
Article
Engineering, Electrical & Electronic
Song Gao, Zengrun Wen, Haiyang Wang, Chams Baker, Liang Chen, Yangjian Cai, Xiaoyi Bao
Summary: Stimulated Brillouin scattering and the longitudinal strain performance based on BOTDA in a nonuniform As2Se3-PMMA tapered fiber areinvestigated. The strain performance of the BGS frequency shift and the BGS linewidth change under the imposed longitudinal strain are analyzed. A strain-insensitive BGS linewidth is achieved by selecting the fiber gain section along the nonuniform As2Se3-PMMA tapered fiber.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Bong-Rim Shin, Uros Puc, Yu-Jin Park, Dong-Joo Kim, Chae-Won Lee, Woojin Yoon, Hoseop Yun, Chaeyoon Kim, Fabian Rotermund, Mojca Jazbinsek, O-Pil Kwon
Summary: In this research, new organic salt crystals with top-level macroscopic optical nonlinearity are logically designed by controlling the van der Waals volume of the molecular ionic components. These crystals, introducing highly electronegative fluorinated substituents, exhibit excellent performance in THz wave generation, crystal density, thermal stability, and crystal growth ability.
Article
Physics, Multidisciplinary
Izaddeen Yakasai, Pg Emeroylariffion Abas, Abdul Mu'iz Maidi, Shubi Kaijage, Feroza Begum
Summary: This study introduces a unique-structured liquid infiltrated photonic crystal fibre for detecting ethanol, methanol and water. It is found that the proposed fibre can accurately and reliably detect and differentiate these liquids in the terahertz region, with high sensitivity and low losses.
Article
Green & Sustainable Science & Technology
Chaofeng Zhao, Lu Sun, Yuejie Ai, Weiwei Liu
Summary: Highly efficient removal of persistent organic pollutants (POPs) by novel porous materials such as covalent organic frameworks (COFs) has aroused widespread attention in environmental remediation. In this study, the adsorption process and mechanism of POPs on corrole-based COF (TPAPC) were systematically investigated using molecular dynamics (MD) simulations and density functional theory (DFT) calculations. The results showed that TPAPC exhibited tremendous adsorption capacity for POPs, with the van der Waals (vdW) interaction playing a dominant role. Polychlorinated biphenyl (PCB) molecules showed stronger binding capacities with TPAPC, making the corrole moiety in TPAPC and PCB molecules the preferable adsorption site and adsorbate, respectively. These findings not only demonstrated the potential of corrole-based COF as a promising adsorbent for removing POPs but also provided a theoretical basis for designing novel COFs materials with specific functional groups in environmental remediation.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Optics
Weiwei Liu, Zeliang Zhang, Qiang Su, Qiang Xu, Lanjun Guo, Zhiqiang Yu, Pengfei Qi, Olga Kosavera, Cheng Gong
Summary: This study demonstrates the effective generation and detection of broadband and high-intensity terahertz pulses using two-color femtosecond laser filamentation and an interdigitated photoconductive antenna (iPCA). The iPCA enables comprehensive characterization of the terahertz signal with high signal-to-noise ratio, sensitivity, and polarization detection. This work provides new insights into high-power broadband terahertz coherent detection.
Article
Chemistry, Multidisciplinary
Jingfan Wang, Xing Zhao, Da Li, Ya Wen, Weihao Wang, Bin Wang, Xiaoxuan Xu, Hua Bai, Weiwei Liu
Summary: This paper introduces a three-dimensional measurement system based on Autostereoscopy-Raman Spectrometry (ARS) for quality control of multilayer glass structure, manufacture and assembly of precision optical components, production process control of liquid crystal panel, and analyzing equipment for biomedical applications, with high accuracy in spatial localization and material identification within sub-micron levels.
APPLIED SCIENCES-BASEL
(2022)
Review
Materials Science, Multidisciplinary
Pengfei Qi, Yuchen Dai, Yang Luo, Guangyi Tao, Wenqi Qian, Zeliang Zhang, Zhi Zhang, Tian Hao Zhang, Lie Lin, Weiwei Liu, Zheyu Fang
Summary: Devices operating with excitons offer potential solutions to the response time and integration challenges faced by current electron-based or/and photon-based devices. Atomically thin transition metal dichalcogenide semiconductors, combined with twistronics and valleytronics, present new opportunities for practical excitonic devices. The control of spatiotemporal exciton flux is a crucial step, which can be achieved through various methods such as strain, electric field, electron-doping, and local dielectric environment. Exciting phenomena like exciton condensation and exciton Hall effects can occur in 2D exciton systems, providing new possibilities for excitonic devices. Proof-of-principle exciton devices at room temperature, including excitonic switching and transistor, exciton guides, and excitonic nanolaser, have been achieved. This review discusses the recent advances in shaping 2D exciton flux, as well as the opportunities and challenges in advancing room temperature excitonic devices.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Optics
Tingyuan Wang, Kai Zhao, Zhen Ge, Yongsheng Chen, Lie Lin, Nan Zhang, Weiwei Liu
Summary: The performance of a photo-thermo-acoustic ultrasonic source can be significantly enhanced by using graphene-based materials. This study demonstrates that the sound pressure of the ultrasonic source is independent of laser polarization and incident angle, and the ultrasonic wave emitted from the graphene foam has a dipole-like acoustic pressure distribution with a principal emission direction normal to the sample surface.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Jinpei Liu, Zhi Zhang, Binpeng Shang, Chunyue Chu, Lu Sun, Nan Zhang, Lie Lin, Weiwei Liu
Summary: Exploring the influence of atmospheric turbulence on remote sensing based on filament-induced fluorescence remains challenging. This study applied artificial turbulence during remote filamentation and recorded the enhanced backward fluorescence of nitrogen. The results showed that the nitrogen fluorescence signal was higher in the presence of strong turbulence compared to no turbulence. The turbulence introduced random noise in the laser profile, which was amplified by the self-focusing effect, leading to multiple filamentation and enhancing fluorescence.
OPTICS COMMUNICATIONS
(2022)
Article
Optics
Zhengxin Wang, Tong Yang, Quhan Cheng, Deling Kong, Cheng Gong, Weiwei Liu
Summary: This article presents a short-wave infrared computed tomography method using a specific set of equipment, which successfully performs tomography and 3D reconstruction of plastic bottles and artificial blood vessels.
Article
Chemistry, Analytical
Shulei Zhuang, Xinyu Li, Tong Yang, Lu Sun, Olga Kosareva, Cheng Gong, Weiwei Liu
Summary: The paper presents a tunable metamaterial based on graphene that exhibits absorption and transmission functionality. The absorption and transmission characteristics can be controlled by modifying the chemical potential of graphene. The metamaterial shows adjustable absorption in the frequency range of 0.72 THz to 1.26 THz, and adjustable transmission at 2.35 THz. The use of UV glue and PET as dielectric and substrate materials respectively make the metamaterial flexible and insensitive to incident and polarization angles.
Article
Biochemical Research Methods
Zhenzhou Cheng, Nan Zhang, Le Chang, Pengfei Qi, Lin Zhang, Lie Lin, Yan Wang, Weiwei Liu
Summary: Myopia and keratoconus are common corneal diseases that affect human vision. Collagen crosslinking (CXL) using riboflavin and ultraviolet A (UVA) light is an effective treatment, but it has risks. This study introduces a new method using near-infrared femtosecond laser to perform two-photon CXL, which enhances corneal stiffness without affecting transparency.
JOURNAL OF BIOPHOTONICS
(2023)
Article
Optics
Xiaoyue Wang, Junyi Nan, Jiayun Xue, Weiwei Liu, Ming Yan, Shuai Yuan, Kun Huang, Heping Zeng
Summary: This study reports a simple technique based on filament-induced nonlinear spectroscopy for information-rich gas imaging. The technique enables high-spatial resolution point-wise imaging in a non-cooperative environment without the need for meticulously arranged cameras.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Engineering, Aerospace
Shoupeng Li, Xiaoyu Zhang, Weiwei Liu, Naigang Cui
Summary: The nonlinear relative dynamics in elliptical orbits and heavy-tailed observation noise can degrade navigation accuracy. The iterative strategy used in Huber-based M-estimation fails to re-linearize the observation model using posterior estimate, resulting in filtering efficiency degradation. To address this, an optimization-based iterative and robust strategy combining iterated unscented Kalman filter (IUKF) with generalized M-estimation is proposed. Experimental results show that the novel strategy improves filtering accuracy, robustness, and consistency under non-Gaussian noise.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Tianhong Zhou, Yanan Zhao, Haisheng Chen, Xiaona Du, Wenwen Chen, Zhengang Dong, Xiaolei Wang, Jiaying Shen, Zhenping Wu, Weiwei Liu, Yang Zhang
Summary: Near-infrared (NIR)-emitting mechanoluminescence (ML) materials are highly desirable for deep imaging inside biological tissues. This study reports sustainable and self-recoverable NIR ML emission in pulsed laser deposition (PLD) grown ZnS:Mn films.
MATERIALS & DESIGN
(2022)
Article
Optics
Binpeng Shang, Pengfei Qi, Jiewei Guo, Zhi Zhang, Lanjun Guo, Chunyue Chu, Jinpei Liu, Olga G. Kosareva, Nan Zhang, Lie Lin, Weiwei Liu
Summary: This study quantitatively diagnosed the characteristics of long-distance filamentation of femtosecond pulses manipulated by energy and temporal domain using the acoustic method, and the results were further validated by experimental data. The study found that pulse energy and initial pulse chirp have an impact on the generation of filaments in the air.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Irina A. Nikolaeva, Daniil E. Shipilo, Nikolay A. Panov, Weiwei Liu, Andrei B. Savel'ev, Olga G. Kosareva
Summary: In this study, the wavelength scaling law for terahertz radiation emitted from a two-color femtosecond filament during cofocusing into air was investigated through 3D + time numerical simulations. The results showed that the energy of the generated THz radiation is proportional to the oscillation energy of the electrons and the total number of free electrons in the filament, and is affected by the pump wavelength. However, the scaling law for THz energy on the pump wavelength is nonmonotonic.
Article
Optics
Jiayun Xue, Xi Zeng, Lanjun Guo, Rui Guo, Zhi Zhang, Chunyue Chu, Zhenzhou Cheng, Nan Zhang, Lie Lin, Weiwei Liu
Summary: The backward angular distributions of sodium fluorescence in NaCl aerosols induced by femtosecond laser filamentation in air at a distance of 10 m were measured, and the recorded signals showed strong angular dependence. Further investigation suggested that this could be attributed to the Mie scattering of filamentation-induced aerosol lasing in the forward direction. These findings will be beneficial for remote-sensing of air pollutants using femtosecond laser filamentation-based LIDAR.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Hang Dong, Zhixin Sun, Jingyi Li, Yahui Li, Wei Zhang, Guangyong Jin
Summary: This paper calculates thermal stresses and adsorption forces to determine laser cleaning conditions and establishes relevant models. Experimental results show that the removal effect is better with increasing nanosecond pulse delay, with the best effect achieved at 600 milliseconds pulse delay. Based on the findings, the mechanisms of oxide film removal involve thermal stress against adsorption and plasma shock wave breaking the oxide layer.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hong Huang, Zhiguang Han
Summary: This paper proposes a new ghost imaging reconstruction method using ordered orthogonal Hadamard derived speckle as the illumination speckle series, and introduces the alternating direction multiplier method to improve the imaging performance. The evaluation results show that the method can achieve high-quality reconstructed images under low sampling conditions.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Moritsugu Sakamoto, Yuki Ono, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Masayuki Tanaka, Hiroshi Ono
Summary: The effect of wavelength and polarization of illuminating light in polarization imaging for birefringent objects placed behind a scattering structure was experimentally investigated. The result shows that the spatial distribution of the birefringent object was more clearly visualized in the longer wavelength combined with circularly polarized light illumination. This finding indicates the potential of using polarization imaging with circularly polarized light illumination in the near-infrared range for visualizing birefringent objects with scattering.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Peihui Du, Hongfang Wang, Pengwei Li, Rukeyemuhan Abadula, Hmbat Batelbek, Min Gao
Summary: In this study, we theoretically demonstrate the strong coupling between Tamm plasmons and exciton polaritons in metal Al/DBR-molecular structures, extending the operating wavelength to the deep ultraviolet region. The coupling strength can be effectively manipulated by adjusting the structure parameters, offering potential benefits for the development of new-style optical filters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Priyanka Chaudhary, Akhilesh Kumar Mishra
Summary: We design and numerically investigate the switching dynamics between two outer waveguides in a parity-time (PT)-symmetric adiabatically coupled three waveguides nonlinear directional coupler (NLDC) system. The study shows that the device can provide switching even when the middle waveguide is nonlinear and the outer waveguides are linear. Furthermore, the effect of loss to gain ratio on critical switching power and the impact of launched light power and gain (loss) value on transmitted power are also studied.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Wei Feng, Yongcong Yi, Shuyang Li, Zhi Xiong, Boya Xie, Zhen Zeng
Summary: Traditional imaging techniques are ineffective in achieving clear underwater imaging due to the presence of scattering media. Single-pixel imaging (SPI) system based on Unet++ offers a solution for reconstructing high-quality images in highly turbid water environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiaorui Qu, Jufeng Zhao, Haijun Tian, Junjie Zhu, Guangmang Cui
Summary: This paper studies the structural similarity between RGB and spectral images and proposes a non-iterative Images Structure Similarity (ISS) method for fast reconstruction of spectral images. Additionally, the input of the Deep Image Prior (DIP) method is optimized for the first time by using the initial spectral data reconstructed by ISS, leading to an improved starting value for the iteration. The experimental results show that the proposed method can enhance the reconstruction quality in both spectral and spatial resolutions, while significantly reducing the reconstruction time compared to other DIP-based methods.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Donghe Sheng, Zhe Han, Zanyang Qiao, Tianpei Dong, Chenxi Wang, Huiping Tian
Summary: In this study, a distributed multi-parameter sensor based on an etched few-mode multi-core fiber is proposed, allowing simultaneous sensing of temperature, strain, and sample refractive index. By combining space division multiplexing and stimulated Brillouin scattering, the sensor achieves high sensitivity in detecting these parameters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)
