Article
Optics
Xin Wang, Ke Tian, Haiyan Zhao, Xiaotong Zhao, Zhi Zhang, Jin Yu, Dejun Liu, Gilberto Brambilla, Pengfei Wang
Summary: This study reports on the challenge of achieving simultaneous blue-red emission in a fiber pumped by a single wavelength source, and investigates the dependence of the blue-to-red upconversion emission ratio on the silica content in Yb3+-Tm3+ codoped fluorosilicate glasses. The results suggest that the probability of the cross-relaxation process 1G4 + 3F2 & RARR;3H6 + 3F4 is key to determining the dominance of the blue or red emissions. This research provides a new platform for variable upconversion luminescence.
Article
Chemistry, Multidisciplinary
Huocheng Lv, Peng Du, Weiping Li, Laihui Luo
Summary: A series of Tm3+/Yb3+-codoped submicron particles were developed via a sol-gel route, and bright upconversion emissions were observed under 980 nm excitation. The emission intensities can be enhanced by increasing temperature due to the negative thermal expansion effect and energy transfer mechanism. The maximum sensitivity of the particles was found to be 0.198 K-1.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Applied
Madan M. Upadhyay, Kaushal Kumar
Summary: Cubic phase Tm3+/Yb3+:Y2O3 and Tm3+/Yb3+/Gd3+:Y2O3 phosphors prepared by low temperature combustion technique exhibit upconversion emission in the UV-visible range. The phosphors show characteristic emission bands from Tm3+ ions and enable optical thermometry using specific Stark sublevels. The maximum absolute sensitivity of the tridoped phosphor at 298 K is 1.33 x 10(-3) K-1.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Multidisciplinary
Bojana Milicevic, Jovana Perisa, Zoran Ristic, Katarina Milenkovic, Zeljka Antic, Krisjanis Smits, Meldra Kemere, Kaspars Vitols, Anatolijs Sarakovskis, Miroslav D. D. Dramicanin
Summary: We present a hydrothermal synthesis method for ultrasmall Yb3+/Tm3+ co-doped Sr2LaF7 (SLF) upconversion phosphors. By varying the concentrations of Yb3+ (x = 10, 15, 20, and 25 mol%) and Tm3+ (y = 0.75, 1, 2, and 3 mol%), the emissions in the near IR spectral range were analyzed. Structural analysis revealed that Yb3+ and Tm3+ occupy the La3+ sites in the SLF host. The addition of Yb3+/Tm3+ ions significantly affected the lattice constant, particle size, and PL emission properties of the synthesized SLF nanophosphor. The optimal dopant concentrations for upconversion luminescence were found to be 20 mol% Yb3+ and 1 mol% Tm3+ with EDTA as the chelating agent. Strong upconversion emission of Tm3+ ions around 800 nm was achieved under 980 nm light excitation. The study suggests potential applications of ultrasmall Yb3+/Tm3+ co-doped SLF phosphors in fluorescent labels for bioimaging and security.
Article
Optics
K. M. Krishna, Madan M. Upadhyay, Vishab Kesarwani, K. Kumar
Summary: Rhombohedral phase Ca3(PO4)2: Tm3+/Yb3+ phosphor was synthesized using a hydrothermal route and the frequency upconversion emission was studied under 980 nm excitation. The samples exhibited strong blue emission at around 472 nm, as well as weak emissions at 650 nm and 700 nm wavelengths. By adjusting the Yb3+ ion concentration, the blue emission was optimized and the best emission was observed in the sample with 0.5 mol% Tm3+ and 5 mol% Yb3+. The temperature-dependent upconversion luminescence was also investigated, and the maximum absolute sensor sensitivity was found to be 3.63 x 10-3 K-1 at 623 K. The Ca3(PO4)2 host material showed promise for intense blue upconversion emission and potential applications in biological imaging due to its biocompatibility.
Article
Nanoscience & Nanotechnology
Mingzhou Meng, Tianmei Zhang, Jiaoyu Wang, Zhenlong Cheng, Yuanli Liu, Xin Qiao, Jian Wen, Ute Resch-Genger, Wen Long, Jun Ou
Summary: The core-shell NaYF4:Yb3+/Tm3+@NaYF4:Yb3+ upconversion nanoparticles were prepared successfully by a solvothermal method and coated with mesoporous silica (mSiO2) to enhance their hydrophilicity. The nanoparticles demonstrated good temperature sensing performance and intense fluorescence emission. They also showed high reliability and accuracy in temperature measurement in phosphate-buffered saline (PBS) solution. This study provides a potential platform for real-time temperature monitoring and thermotherapy of cancer cells.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Olga A. Lipina, Yana V. Baklanova, Tatyana S. Spiridonova, Elena G. Khaikina
Summary: New Ho3+/Yb3+ and Tm3+/Yb3+ codoped Na5Rb7Sc2(WO4)(9) phosphors were synthesized using a conventional solid state reaction method. These phosphors exhibit upconversion luminescence under 980 nm laser diode excitation and show promising temperature measurement performance at certain temperatures.
Article
Spectroscopy
Jia Zhang, Songsong An, Yining Zhang, Yamei Zhang
Summary: A series of novel LS:Er3+,Yb3+ luminescent materials were successfully synthesized and their upconversion luminescence properties and temperature-sensing performance were systematically investigated. The study found that the optimal Yb3+ concentration in LS:1%Er3+,xYb(3+) was x=15%, and the LS:Er3+,Yb3+ material exhibited good reversibility and repeatability.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Inorganic & Nuclear
N. O. Etafo, J. Oliva, C. R. Garcia, A. Mtz-Enriquez, J. Ruiz, F. Avalos-Belmontes, C. M. Lopez-Badillo, C. Gomez-Solis
Summary: We investigated the structural, morphological and luminescent properties of BaLaAlO4:Yb3+,Tm3+ (BAL:Yb,Tm) phosphors synthesized by a combustion method. Adding Yb3+ co-dopant resulted in samples with an orthorhombic phase. The phosphors consist of coalesced microparticles with irregular shape and smaller decorated nanoparticles. The emission bands can be tuned by varying the Yb3+ concentration. The study suggests that the BAL:Yb,Tm phosphors have potential applications in biomarkers or lighting.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Joydip Dutta, Mitesh Chakraborty, Vineet Kumar Rai
Summary: Tm3+; Yb3+:Zn2TiO4 samples were synthesized and characterized using XRD, HRTEM, DRS, Raman spectra, and emission spectra. The presence of Yb3+ ion in the compound was confirmed by the intense peak observed in DRS. The optical band gap was calculated, and the enhancement of blue UC emission intensity was demonstrated with Yb3+ doping.
Article
Materials Science, Ceramics
Junhao Xing, Fei Shang, Guohua Chen
Summary: The study focuses on the structure, properties, and potential application value of Yb3+/Tm3+ codoped glass suitable for rare-earth-doped luminescence, particularly in the field of optical temperature sensing.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Yuhong Zhang, Bo Wang, Yunhe Liu, Guangyao Bai, Zuoling Fu, Hang Liu
Summary: Yb3+/Tm3+ codoped KLa(MoO4)(2) phosphors were synthesized by a hydrothermal method, and their upconversion emission spectra were observed under 980 nm excitation. The temperature sensing characteristic based on the fluorescence intensity ratio was studied, with a maximum sensitivity of 2.93% K-1 at 453 K. The results showed that the phosphor could be used in temperature sensors, with higher sensitivity for non-thermally coupled levels than thermally coupled levels.
DALTON TRANSACTIONS
(2021)
Article
Optics
Aleksandra Pilch-Wr, Karolina Ledwa, Agata Kotulska, Artur Bednarkiewicz
Summary: In this study, Yb^3+ and Tm^3+ doped NaYF4 nanoparticles codoped with optically active Ce^3+ ions were synthesized and investigated. The relative emission intensity ratios of the nanoparticles were found to be significantly dependent on external stimuli such as temperature and excitation pulse length. The results showed potential applications for tuning emission and thermal properties in practical uses.
JOURNAL OF LUMINESCENCE
(2022)
Article
Optics
Tian Xie, Pan Jiang, Chengbin Zhang, Ruoshan Lei, Xingzhen Huang, Lei Lei, Shilong Zhao, Bingpeng Li, Xu Shiqing
Summary: This study systematically investigates the dual-mode luminescence properties and optical thermometric performances of Tm3+, Yb3+: Gd2Zr2O7 nanocrystals synthesized by a hydrothermal method. The results show that these nanocrystals have high optical temperature sensing sensitivity and potential applications in photodynamic therapy.
JOURNAL OF LUMINESCENCE
(2022)
Article
Optics
Zhongli Wu, Yupeng Zhang, Dongmei Bao, Hongqing Li, Xueqing Hou, Jilan Wang
Summary: The optical transition properties of Tm3+ in oxyfluoride tellurite glass were determined using the Judd-Ofelt theory. The study obtained radiative transition rates, fluorescence branching ratios, and intrinsic lifetimes for interesting transitions or levels. It was found that the optimal doping concentration for upconversion luminescence was 0.1% Tm2O3. The analysis also confirmed two-photon and three-photon processes for specific emissions of Tm3+.
JOURNAL OF LUMINESCENCE
(2022)
Article
Automation & Control Systems
Dongyu Li, Shuzhi Sam Ge, Tong Heng Lee
Summary: In this article, the definition and relevant sufficient condition for simultaneous arrival to origin (SATO) convergence are proposed. The differences between classical and norm-normalized sign functions are studied along with their applications in sliding-mode control design. It is found that the norm-normalized sign function enables SATO convergence and achieves consensus in a networked system.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2022)
Article
Computer Science, Artificial Intelligence
Guangtao Ran, Chuanjiang Li, Hak-Keung Lam, Dongyu Li, Chunsong Han
Summary: This article proposes a new design of an event-based dissipative asynchronous controller for IT2 fuzzy MJSs subject to sensor saturation and actuator nonlinearity. By solving H-infinity, passive, and dissipative fuzzy control problems using a unified framework, the energy consumption of communication can be reduced. The system and controller modes are asynchronous, and a hidden Markov model is employed to observe the modes of the original system. The stability of the closed-loop system is analyzed using the membership-function-dependent approach. Two examples are presented to demonstrate the effectiveness of the proposed algorithms.
IEEE TRANSACTIONS ON FUZZY SYSTEMS
(2022)
Article
Chemistry, Applied
Yunfeng Bai, Xiaoxi Liu, Shaojian Zhang, Haili Jiang, Lu Liu, Isam Ud Din, Jianzhong Zhang
Summary: We have revealed an energy cycling strategy capable of suppressing the inner energy dissipation in lanthanide-doped upconversion nanocrystals. By introducing Yb3+ ions as an energy reservoir to compete with the inner energy dissipation in heavily doped nanocrystals, the upconversion intensity of Er3+ is enhanced. This energy cycling strategy is highly valuable in lanthanide luminescent nanomaterials due to its facile and cost-effective preparation as well as broad scope of application.
JOURNAL OF RARE EARTHS
(2023)
Article
Pharmacology & Pharmacy
Hao Tian, Tao Jiang, Kai Yang, Ruonan Ning, Tianqi Wang, Qi Zhou, Niandong Qian, Ping Huang, Lei Guo, Min Jiang, Xiaobing Xi, Xing Xu, Lianfu Deng
Summary: This study found that alpha-asarone (ASA), a compound derived from the traditional Chinese medicinal herb Acorus tatarinowii, can inhibit the activity of overactivated osteoclasts and reduce bone resorption. ASA's effects on osteoclastogenesis are dose-dependent and mediated through multiple signaling pathways. In an estrogen-deficiency-induced osteoporosis model, ASA also improved bone microstructure.
FRONTIERS IN PHARMACOLOGY
(2022)
Article
Materials Science, Ceramics
Dongyu Li, Weijiang Xu, Zhen Huang, Xiao Jin, Bing Xu, Zhenghe Zhang, Tingting Zhang, Deng Wang, Xuping Liu, Hao Suo, Qinghua Li
Summary: The effects of site symmetric distortion induced by the phase transition on up-conversion emission and thermal sensing performance of Gd-2(MoO4)(3):Yb3+/Er3+ (GMO) crystals were studied extensively. Monoclinic GMO showed stronger fluorescence intensity and higher thermal sensing performance compared to the orthorhombic counterpart, which can be attributed to its low site symmetry and large site symmetric distortion. The results provide an efficient approach to achieving highly sensitive thermometry in various daily scenarios by finely tailoring the local site symmetry.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Jinke Bai, Linfeng Wang, Tingling Zhang, Tianyi Hou, Meilun Zhang, Bing Xu, Dongyu Li, Xiao Jin, Qinghua Li, Yuxiao Wang, Xueru Zhang, Yinglin Song
Summary: The reduction of inhomogeneous and homogeneous broadening is important for achieving narrow spectral linewidths in colloidal alloy quantum dots (QDs). It has been found that the homogeneous broadening mechanism is influenced by exciton fine structure splitting and exciton-phonon coupling. In this study, lattice mismatch strain is eliminated using a coherent strain structure, which decreases the light-heavy hole splitting and suppresses asymmetric broadening. Additionally, the uniformity of the alloy is improved using a stepwise ion exchange strategy, which weakens exciton-longitudinal optical (LO)-phonon interactions and further minimizes homogeneous broadening. The resulting alloy QD products exhibit a widely tunable blue emission wavelength with narrow ensemble photoluminescence full width at half maximum.
Article
Nanoscience & Nanotechnology
Ci Wang, Hai-Zheng Shi, Wen-Hao Li, Qing-Miao Hu, Lu Liu, Jing Ren, Jianzhong Zhang
Summary: This study reports a new series of Na1-xMgxNbO3:Pr3+ (x=0.00, 0.10, 0.20, 0.40, 0.60, 0.80, and 1.00 mol%) heterojunction systems, which exhibit significant mechanoluminescence (ML) enhancement compared to Pr3+-doped NaNbO3 or MgNbO3. The physical mechanisms behind the ML enhancement have been comprehensively explored from both experimental and theoretical perspectives.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Aerospace
Youmin Gong, Yanning Guo, Dongyu Li, Guangfu Ma
Summary: This paper focuses on the Mars soft pinpoint landing feedback guidance to construct a non-concave trajectory for superior obstacle avoidance and camera's field of view of the landing site. More specifically, an adaptive curvature guidance based on a nominal curvature dynamic model is developed to steer the vehicle. Then, an adaptive sliding mode guidance based on zero-effort-miss/zero-effort-velocity (ZEM/ZEV) guidance is proposed to improve the robustness. Numerical simulations are performed to verify the feasibility and effectiveness of the proposed algorithms, which include constructing a glide-slope trajectory to avoid rollover.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Youmin Gong, Yanning Guo, Dongyu Li, Guangfu Ma, Minwen Guo
Summary: This article proposes a planetary autonomous soft pinpoint adaptive fixed-time feedback landing guidance scheme based on sliding mode control. The scheme takes into consideration constraints such as thruster magnitude, unknown control acceleration deviation, and disturbance without a priori knowledge. The proposed algorithms are verified through numerical simulations and compared with an offline fuel-optimal guidance to demonstrate their near-fuel-optimal performance.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2023)
Article
Automation & Control Systems
Yongxia Shi, Qinglei Hu, Dongyu Li, Maolong Lv
Summary: This article presents a solution to the event-triggered optimal tracking control problem for leader-follower spacecraft formation flying system using adaptive dynamic programming. The Hamilton-Jacobi-Bellman equation is solved using a single-critic neural network to approximate the optimal cost function. A semiglobal adaptive update law is derived to tune the critic neural network, and an input-state-dependent event-triggered mechanism is designed to reduce the execution frequency of the control command. Theoretical scheme is validated through numerical simulations on two formation satellites in low Earth orbit.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Automation & Control Systems
Dongting Li, Rui-Qi Dong, Yanning Guo, Guangtao Ran, Dongyu Li
Summary: This article introduces a line-of-sight (LOS)-Euler rendezvous and docking (RVD) framework for docking with a tumbling target under various RVD constraints. The framework uses a double-loop control scheme to control the chaser's position and attitude to track the target's docking port and rotation. The proposed framework linearly describes the complex couplings between the position and attitude control and the RVD constraints.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2023)
Article
Computer Science, Information Systems
Wanyue Jiang, Shuzhi Sam Ge, Dongyu Li
Summary: This study examines the fixed-time-synchronized control problem for perturbed multi-input multi-output (MIMO) systems. It categorizes the MIMO system into two cases based on the dimension of system signals and their convergence capability: the input-dimension-dominant and the state-dimension-dominant cases. Sufficient Lyapunov conditions are explored for fixed-time-synchronized convergence in each case, and robust sliding mode controllers are designed. The proposed method is demonstrated using the brake control of a vertical takeoff and landing aircraft, showing advantages in reducing energy consumption and output trajectory length. Comparative numerical simulations also show semi-time-synchronized property for the state-dimension-dominant case.
SCIENCE CHINA-INFORMATION SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Xinyu Wang, Boyang Li, Raza Syed Muhammad Ehtesham, Ye Tian, Dongyu Li, Lu Liu, Haili Jiang, Fuqiang Jiang
Summary: This study presents simple Er3+-doped Yttria phosphors capable of changing color through the manipulation of 1530 nm excitation intensity. Unlike previous reports of Er3+ color change from green to red with increasing excitation intensity, the color-tunable phosphors formed in this work exhibit an inverse change from red to green. The color tuning mechanisms are attributed to the competition between upward absorption and downward decay at the Er3+ intermediate state. The potential applications of these color-tunable phosphors are demonstrated, highlighting their wide application prospects.
Article
Automation & Control Systems
Jia Guo, Dongyu Li, Bo He, Shuzhi Sam Ge
Summary: In this article, an intelligent collaborative system for robotic navigation and control (CNaC) governed by the Euler-Lagrange equation is proposed. A state reconstruction based on neural networks navigation (SR-NNN) law is designed to estimate the current position of the robot for intelligent CNaC. The system has been demonstrated by simulation tracking sample and real experiments, which verifies its effectiveness.
IEEE TRANSACTIONS ON CYBERNETICS
(2023)
Article
Chemistry, Multidisciplinary
Zhijie Chen, Mengyuan Lv, Jing Liang, Kai Yang, Fan Li, Zhi Zhou, Minglong Qiu, Haoyi Chen, Zhengwei Cai, Wenguo Cui, Zhanchun Li
Summary: Postmenopausal osteoporosis is often associated with neuroendocrine changes in the hypothalamus, which are closely related to the microbial diversity, community composition, and intestinal metabolites of gut microbiota. This study revealed the existence of a neuroendocrine signal called neuropeptide Y (NPY) that mediates the brain-gut-bone axis and affects bone metabolism. The findings suggest that targeting NPY-mediated changes in gut microbiota could be a novel approach for treating postmenopausal osteoporosis.
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)
