Article
Multidisciplinary Sciences
Balint Kovacs, Fabio Aldo Kraft, Zsolt Szabo, Yousef Nazirizadeh, Martina Gerken, Robert Horvath
Summary: Numerical simulations and analytical calculations were conducted to support the design of grating-coupled planar optical waveguides for biological sensing. The study focused on near cut-off and far from cut-off modes, comparing their characteristics and suitability for sensing. The results suggest that the proposed device's operating wavelength and sensitivity can be tuned by varying the geometrical parameters of the corrugated waveguide, potentially leading to the development of highly sensitive integrated sensors with cost-effective designs.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Kangni Wang, Tiancheng Gu, Dmitry A. Bykov, Xin Zhang, Linyong Qian
Summary: Nanolasers based on quasi-bound states in the continuum (quasi-BIC) have unique optical properties and strong light-matter interaction. A proposed structure combining quasi-BIC and guided mode in a slanted resonant waveguide grating enables tunability in wavelength. Numerical simulation shows a threshold of approximately 7.75 mu J/cm(2) and a tuning range of 28 nm. This work demonstrates the potential of designing tunable nanolasers by combining quasi-BIC with guided mode.
Article
Optics
Georgia Mourkioti, Danish Bashir, Goby A. Govindassamy, Fangfang Li, Robert W. Eason, Thomas Graf, Marwan Abdou Ahmed, Jacob I. Mackenzie
Summary: This paper presents the fabrication and first demonstration of all-dielectric crystalline grating-waveguide reflectors consisting of a Sc2O3 waveguide grown on a sub-wavelength-patterned sapphire substrate. Rigorous coupled-wave analysis is used to simulate the structure, showing a theoretically 100% resonance reflectivity. The sapphire substrate is patterned using inductively coupled plasma etching, while the Sc2O3 crystalline waveguide is grown through pulsed laser deposition. Devices with distinct TE- and TM-polarisation resonances are demonstrated, with reflectance close to 90% at an angle of incidence near 10 degrees. Refining the fabrication processes and tolerances should improve the surface quality and achieve resonance reflectivity closer to the ideal state.
APPLIED PHYSICS B-LASERS AND OPTICS
(2023)
Article
Optics
Huagang Lin, Yuxin Xing, Xiaolu Chen, Shuo Zhang, Erik Forsberg, Sailing He
Summary: A novel tactile sensor for two-dimensional force location measurements is presented, which is based on polymer-based planar waveguide chirped Bragg gratings (PPCBGs) fabricated on a PMMA substrate. The sensor measures the location and magnitude of an applied force by observing the change of the wavelength of a dip in the measured spectrum and a change in the reflectivity intensity. Experimental results show submillimeter spatial resolution and a sensitivity of 947.02 pm/mm for applied forces in the range of 1-4 N.
Article
Materials Science, Multidisciplinary
Yannick Bleu, Hugo Bruhier, Thomas Pouit, Arnaud Valour, Damien Jamon, Nicolas Crespo-Monteiro, Laurent Dubost, Florent Bourquard, Christophe Donnet, Olivier Parriaux, Yves Jourlin
Summary: This work presents a novel thermally activated optical switch using a SiN/VO2/SiN multilayer sandwich structure with an AMONIL-based grating. The optical switching is achieved through the insulator-to-metal transition of the VO2-embedded layer. At room temperature, the switch exhibits high resonant transmittance (75%) due to the excitation of an asymmetrical TE1 mode in the multilayer waveguide structure. Increasing the temperature above 47 degrees C results in a complete cancellation of the resonance effect and reduced transmittance (30%). The proposed design shows good performance and opens up possibilities for VO2-based optical switches in photonics applications.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yicun Yao, Yanru Xie, Nan-Kuang Chen, Ivonne Pfalzgraf, Sergiy Suntsov, Detlef Kip, Yingying Ren
Summary: This study introduces a new compact RWG fiber-optic sensor with an additional Fabry-Perot cavity integrated onto the tip of a single-mode fiber, achieving enhanced peak reflectance and improved figure of merit, while greatly reducing the grating size for spatial multiplexing of multiple sensors on the tip of a single multi-core fiber.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Maria Alejandra Usuga Higuita, Hugo Bruhier, Marion Hochedel, Thomas Kampfe, Francis Vocanson, Arnaud Valour, Damien Jamon, Michel Langlet, Nicolas Crespo-Monteiro, Yves Jourlin
Summary: A single-step sol-gel technological approach was used to fabricate resonant waveguide gratings on planar and cylindrical substrates, demonstrating resonant reflection in TE and TM polarization in the near-infrared region. The same TiO2 sol-gel layer was used for both the high index waveguide layer and grating printing, showing expected resonant behavior in the reflection spectrum.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Optics
Jun Zou, Lingfeng Li, Changhui Wang, Yuan Zhuang, Xuyang Wang, Jinhua Hu, Shaobo Luo, Jian-Jun He
Summary: In this study, a novel micro-spectrometer with high-resolution and large-bandwidth is proposed and demonstrated. It utilizes an arrayed waveguide grating (AWG) and dual-wavelength grating couplers to operate at dual-wavelength band. The resolution of the micro-spectrometer is improved by employing time-division-multiplexing inputs, and the effective channel number is enlarged. Experimental results show that the fabricated device achieves 63 effective channels and resolutions of 0.5 and 0.442 nm at 1550 and 1310 nm bands, respectively.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Jun Zou, Lingfeng Li, Yuan Zhuang, Changhui Wang, Ming Zhang, Zichun Le, Xuyang Wang, Gaozhe Cai, Shilun Feng, Jian-Jun He
Summary: This study presents a polarization-insensitive micro-spectrometer based on a (N + 3) x (N + 3) arrayed waveguide grating (AWG) on a silicon-on-insulator (SOI) platform. The micro-spectrometer achieves enhanced channel wavelength spacing and channel number enlargement through time division multiplexing. Experimental results demonstrate the good performance of the micro-spectrometer, making it promising for applications in FBG sensor readout units and optical waveguide sensor systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Polymer Science
Huaguan Li, Hao Wang, Junxian Xiang, Zhaoxuan Li, Xi Chen, Jie Tao
Summary: This study investigated the evolution behaviors of curing residual stresses in GLARE under a hot-pressing condition and explained the mechanism of residual stress reduction. Results showed that the FE prediction models of the entire cure process were more precise than the traditional elastic model, and the stress evolution mainly occurred in the cooling stage. The curing shrinkage stress in the GFRP layer during the holding stage also significantly influenced the final stress level.
Article
Optics
Taotao Hu, Xia Zhang, Mingqian Zhang, Xin Yan
Summary: A high resolution on-chip ultraviolet spectrometer designed in this study, using MgF2 and Al2O3 materials, shows low loss and high wavelength resolution for accurate on-site detections. The cascaded structure performs similarly to lens-based ultraviolet Raman spectroscopy systems.
OPTICS COMMUNICATIONS
(2021)
Article
Plant Sciences
Rui Gu, Zhi Qiang Wan, Fang Tang, Xue Ting Liu, Yan Ting Yang, Feng Ling Shi
Summary: This study investigated the salt tolerance mechanism of G. maritima through phenotypic, physiological, and transcriptomic approaches. The results revealed the presence of salt gland tissue in G. maritima leaves and identified essential genes and pathways related to salt tolerance. These findings provide valuable information for understanding the functional characteristics of G. maritima and breeding salt-resistant fodder crops for cultivation in saline alkali land.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Xiaohui Wu, Yaning Fan, Ruoyi Wang, Qian Zhao, Qurban Ali, Huijun Wu, Qin Gu, Rainer Borriss, Yongli Xie, Xuewen Gao
Summary: This study demonstrates that inoculation with halophilic plant growth-promoting rhizobacteria (PGPR) can alleviate salt stress in plants by modulating phytohormone levels, regulating lipid peroxidation, accumulating betaine, and excluding Na+. The bacterial strain Bacillus halotolerans KKD1 positively affects wheat plant growth under saline conditions and improves soil nutrient content and pH.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Horticulture
M. S. Aboryia, El-Refaey F. A. El-Dengawy, Mostafa F. El-Banna, Mervat H. El-Gobba, Mahmoud M. Kasem, Ahmed A. Hegazy, Heba Metwally Hassan, Ahmed Abou El-Yazied, Hany G. Abd El-Gawad, Salem Mesfir Al-Qahtani, Nadi Awad Al-Harbi, Eldessoky S. Dessoky, Ismail A. Ismail, Mohamed M. El-Mogy, El-Sayed A. EL-Boraie
Summary: This study conducted a field trial to evaluate the physiological responses and tolerance of jojoba plants to salinity stress, focusing on the role of proline as a foliar application. The results showed that proline at 450 ppm enhanced the growth and physiological characteristics of jojoba plants, as well as promoted the antioxidant system. The anatomical structure of leaves also exhibited favorable variations. These findings suggest that proline foliar application can improve the physicochemical and morphological characteristics of jojoba plants under salinity stress.
Article
Chemistry, Analytical
Zhenmin Liu, Na Chen, Yong Liu, Zhenyi Chen, Fufei Pang, Tingyun Wang
Summary: In this study, an optical fiber Bragg grating (FBG) sensor is used to monitor the temperature change of a high-power RF MOSFET. The FBG can accurately capture the temperature variation within each RF pulse and provide detailed temperature information. A Cauer-type thermal model of the RF MOSFET is constructed based on the temperature data obtained from the FBG.
Article
Chemistry, Analytical
Huayun Deng, Chaoming Wang, Ming Su, Ye Fang
ANALYTICAL CHEMISTRY
(2012)
Article
Biochemical Research Methods
Elizabeth Tran, Haiyan Sun, Ye Fang
ASSAY AND DRUG DEVELOPMENT TECHNOLOGIES
(2012)
Article
Chemistry, Medicinal
Huayun Deng, Jieyu Hu, Haibei Hu, Mingqian He, Ye Fang
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
(2012)
Review
Pharmacology & Pharmacy
Ye Fang
EXPERT OPINION ON DRUG DISCOVERY
(2012)
Article
Chemistry, Medicinal
Huayun Deng, Haibei Hu, Mingqian He, Jieyu Hu, Weijun Niu, Ann M. Ferrie, Ye Fang
JOURNAL OF MEDICINAL CHEMISTRY
(2011)
Article
Biochemistry & Molecular Biology
Florence Verrier, Songon An, Ann M. Ferrie, Haiyan Sun, Minjoung Kyoung, Huayun Deng, Ye Fang, Stephen J. Benkovic
NATURE CHEMICAL BIOLOGY
(2011)
Article
Pharmacology & Pharmacy
Huayun Deng, Ye Fang
NAUNYN-SCHMIEDEBERGS ARCHIVES OF PHARMACOLOGY
(2012)
Article
Pharmacology & Pharmacy
Huayun Deng, Ye Fang
Article
Biochemistry & Molecular Biology
Huayun Deng, Ye Fang
Article
Chemistry, Medicinal
Huayun Deng, Ye Fang
ACS MEDICINAL CHEMISTRY LETTERS
(2012)
Article
Chemistry, Medicinal
Huayun Deng, Haibei Hu, Shizhang Ling, Ann M. Ferrie, Ye Fang
ACS MEDICINAL CHEMISTRY LETTERS
(2012)
Article
Multidisciplinary Sciences
Huayun Deng, Haibei Hu, Ye Fang
SCIENTIFIC REPORTS
(2012)
Article
Pharmacology & Pharmacy
Ye Fang
JOURNAL OF PHARMACOLOGICAL AND TOXICOLOGICAL METHODS
(2013)
Article
Biochemical Research Methods
Sadashiva Pai, Florence Verrier, Haiyan Sun, Haibei Hu, Ann M. Ferrie, Azita Eshraghi, Ye Fang
JOURNAL OF BIOMOLECULAR SCREENING
(2012)
