JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Chenglong Wang,Luchao Ren,Zixin Zhang,Hui Peng,Cuncheng Li,Panpan Lyu,Qingyang Du,Mingwei Zhang
A dual-modification strategy combining (Li 0.5 Bi 0.5 ) 2+ substitution and BaCu(B 2 O 5 )/LiF atmosphere-assisted sintering was developed to reduce the sintering temperature of MgGa 2 O 4 ceramic. The strategy achieved a 360 °C reduction in sintering temperature (from 1610 to 1250 °C) while maintaining a high performance. The optimal sample (Li 0.5 Bi 0.5 ) x Mg 1- x Ga 2 O 4 ( x = 0.02) exhibited ε r = 9.41, Q × f = 127,159 GHz, and τ f = -39.6 ppm/°C. XRD and Rietveld refinement confirmed that the spinel structure was preserved upon doping, alongside a lattice expansion. Consistent with the enhanced Q × f , a Raman spectroscopy analysis revealed a narrowing of the T 2 g mode, indicating an improved structural ordering. Furthermore, τ f was improved to −39.6 ppm/°C, directly related to the induced lattice distortion and expansion. The enhanced performance was attributed to the synergistic effects of composite ion doping and atmosphere-assisted sintering. The former modified the intrinsic structure and polarization characteristics, while the latter facilitated the densification at lower temperatures.
研究领域:
材料科学
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陶瓷工程
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产品关联
DOI
高影响因子
Photonics Research
·
2024
·Vol. 12
·期 7
·1542-1547
·
IF 6.6
Zhibo Hou,Zhibo Hou,Liao Chen,Liao Chen,Rongwu Liu,Rongwu Liu,Chi Zhang,Chi Zhang,Xiaojun Wu,Xiaojun Wu,Xinliang Zhang,Xinliang Zhang,Xinliang Zhang
The terahertz (THz) absorption spectrum is a powerful method to identify substances. The improvement focuses on sensitivity and recovery ability. Here, we demonstrate enhanced THz vibrational absorption spectroscopy based on an on-chip THz whispering gallery mode resonator (THz-WGMR). A THz-WGMR with high Q can store energy and enhance the interaction between the THz waves and the target substances to capture the unique absorption fingerprint information. Therefore, it possesses significant sensitivity to identify trace amounts of substances. As a proof of concept, lactose powder and glucose powder are applied to demonstrate the effectiveness of our approach in recovering fingerprint absorption spectroscopy. Compared with a straight waveguide, the high sensitivity of the THz-WGMR is illustrated. The change of the transmissivity caused by the lactose reaches 7.8 dB around 532 GHz for the THz-WGMR, while only 1.4 dB for the straight waveguide, demonstrating the state-of-the-art sensing performance in fingerprint absorption recovery. We believe the proposed integrated THz-WGMR will promote the THz identification of tiny fingerprint substances.
研究领域:
物理学
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光学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Chao Du,Di Zhou,Shu-Zhao Hao,He-Tuo Chen,Jian Zhang,Shi-Kuan Sun,Tao Zhou,Ming-Zhao Dang,Shao-Fei Wang,Hai-Wen Liu,Long Li,Zhuo Xu
Transparent material has been widely used in product design and has seen a large increase in its use. In this paper, a kind of aesthetically decorative 5 GHz Wi-Fi dielectric resonator antenna (DRA) of aluminum oxynitride (AlON) transparent ceramic has been designed. High-quality-factor AlON transparent dielectric ceramics were fabricated by presintering at 1780 °C and further cold isostatic pressing (CIP) under a 200 MPa argon atmosphere. For a 9.0 mm thick specimen, the in-line light transmittance reached 83%. Optimum dielectric constant (εr = 9.32), quality factor (Qf = 47 960) and temperature coefficient (TCF = −51.7 ppm/°C) was achieved in the AlON transparent ceramic by cold isostatic pressing. As a result, the proposed aesthetically decorative DRA can achieve an impedance bandwidth of 32% (4.48–6.19 GHz), a high radiation efficiency of 85%, and a low cross-polarization discrimination (XPD) of −30 dB. To achieve a broad bandwidth, the proposed antenna was excited in its dominant TE111x mode and higher-order TE113x mode. The proposed antenna is thus an excellent candidate for an indoor decoration Wi-Fi antenna.
研究领域:
材料科学
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无线通信
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陶瓷工程
✓ 已验证
DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Jiang Wei,Yan Miao,Wenqian Zhang,Youxin Chen,Guotao Sun,Kaiyu Wu,Qingkang Wang
The development of high Q and tunable narrowband filters that can efficiently manipulate THz beams is critical for various THz applications, such as imaging and sensing. However, for filters made of metals and dielectrics, issues such as high losses, limited tunability, and lengthy process flows exist. Here, a scalable concave version reprinting technique to mass produce high-performance microstructured polymer filters is presented. The technique is extremely simple, eliminating the demand for the use of any large equipment including injection molding and thermal press printing machines, and is reliable; in the reprinted structures, there are no defects including gaps and air bubbles. The produced narrowband filters exhibit a high Q factor of 57 with wide tunability over the THz band from ∼80 to 160 μm in wavelength. The presented technique can be adopted to realize other devices as well using polymer materials with simplicity and high precision.
研究领域:
光学工程
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材料科学
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微纳米制造
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 44
·期 17
·21000-21003
·
IF 3.057
Jie Zhang,Zhenxing Yue,Yu Luo,Longtu Li
A cofired trilayer ceramic architecture showing as MgTiO 3 /TiO 2 /MgTiO 3 was designed to realize temperature-stable and ultrahigh- Q microwave dielectrics in the typical MgTiO 3 -TiO 2 system. The effects of TiO 2 content on the microwave dielectric properties of cofired trilayer ceramics were studied. Through the design of cofired trilayer architecture, the chemical reactions between MgTiO 3 and TiO 2 were limited within a narrow region of MgTiO 3 /TiO 2 interfaces (~ 15 µm in width), which could be beneficial for optimizing the microwave dielectric properties. Excellent characteristics of ε r ~ 18.38, Q×f value ~ 169,900 GHz and τ f ~ − 1 ppm/°C were gained for the MgTiO 3 /TiO 2 /MgTiO 3 ceramic architectures stacked with 1.63 vol% TiO 2 . The current work could serve as new strategies to develop high-performance dielectric resonators and multilayers for 5G wireless communication applications.
研究领域:
材料科学
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无机非金属材料
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电子陶瓷
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微波介质材料
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功能陶瓷
✓ 已验证
DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Jiandong Liu,Bin Liu,Juan Liu,Xing-Dao He,Jinhui Yuan,Zabih Ghassemlooy,Hamdi Torun,Yong-Qing Fu,Xuewu Dai,Wai Pang Ng,Richard Binns,Qiang Wu
A critical challenge to realize ultra-high sensitivity with optical fiber interferometers for label free biosensing is to achieve high quality factors (Q-factor) in liquid. In this work a high Q-factor of 10 5 , which significantly improves the detection resolution is described based on a structure of single mode -core-only -single mode fiber (SCS) with its multimode (or Mach-Zehnder) interference effect as a filter that is integrated into an erbium-doped fiber laser (EDFL) system for excitation. In the case study, the section of core-only fiber is functionalized with porcine immunoglobulin G (IgG) antibodies, which could selectively bind to bacterial pathogen of Staphylococcus aureus ( S. aureus ). The developed microfiber-based biosensing platform called SCS-based EDFL biosensors can effectively detect concentrations of S. aureus from 10 to 10 5 CFU/mL, with a responsivity of 0.426 nm wavelength shift in the measured spectrum for S. aureus concentration of 10 CFU/mL. The limit of detection (LoD) is estimated as 7.3 CFU/mL based on the measurement of S. aureus with minimum concentration of 10 CFU/mL. In addition, when a lower concentration of 1 CFU/mL is applied to the biosensor, a wavelength shift of 0.12 nm is observed in 10% of samples (1/10), indicating actual LoD of 1 CFU/mL for the proposed biosensor. Attributed to its good sensitivity, stability, reproducibility and specificity, the proposed EDFL based biosensing platform has great potentials for diagnostics.
研究领域:
光学
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生物传感
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光子学
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微生物学
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产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Huimin Yu,Xueqiong Su,Yong Pan,Dongwen Gao,Jin Wang,Ruixiang Chen,Junhe Zhang,Fei Dou,Xinping Zhang,Kun Ge,Xiaoyu Shi,Tianrui Zhai,Li Wang
The whispering gallery mode (WGM) microcavity has a high-quality factor and small mode volume, for the property of confining photons in a small volume for a long time, which enhances the light-matter interaction. Combining with quantum dots that act as gain medium, it can realize low-threshold and narrow-linewidth microlasers with excellent performance. However, achieving conventional whispering gallery mode lasers still requires complex preparation conditions. Here, we report a narrow linewidth whispering gallery mode lasing from all-inorganic perovskite quantum dots (CsPbBr 3 QDs), illustrating facile and cost-effective properties. CsPbBr 3 QDs with excellent properties were synthesized by hot injection method and used as gain media for lasers, and microspheres as optical resonators . The whispering gallery mode laser with a quality factor Q of 4791 and a narrow linewidth of 0.11 nm was obtained at room temperature. The WGM microlaser achieved by this paper could be a great application prospects in biotechnology.
研究领域:
光学
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光子学
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材料科学
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生物技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2025
·Vol. 33
·期 8
·18358-18368
·
IF 3.3
Yan Miao,Yan Miao,Youxin Chen,Youxin Chen,Wenqian Zhang,Wenqian Zhang,Qingkang Wang,Qingkang Wang,Kaiyu Wu,Kaiyu Wu
Quasi-bound states in the continuum (QBIC) offering high Q factors possess great value in fields such as sensing, nonlinear optics, and imaging. However, limited by loss in materials and the demanding requirements for accuracy in fabrication, realizing high-quality QBIC devices is challenging in THz, especially at high THz frequencies where conventional materials become more lossy and the dimension of the device shrinks. Here, we report a polymeric dual-band QBIC device in THz. It exhibits an ultrahigh experimental Q factor of 427.1 above 4 THz. The device is composed of an asymmetric resonant waveguide grating structure made of low-loss styrene-butadiene-styrene polymer, obtained by a simple and precise version printing method suitable for mass production. Spectral shapes and Q factors of the two QBIC bands can be independently adjusted, demonstrating flexibility towards different potential applications. The presented strategy with the achieved device shall promote the application of THz technology in high-frequency THz bands.
研究领域:
太赫兹技术
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光子学
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光学器件
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材料科学
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传感技术
·
纳米制造
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Weijia Guo,Zhiyu Ma,Yutian Lu,Zhenxing Yue
High- Q and temperature-stable ceramics are indispensable in microwave engineering. However, medium-permittivity ( ε r ∼ 60, named as K60) microwave dielectric ceramics that meet the above demands are yet to be synthesized. High- Q Ba 4 Sm 9.33 Ti 16.5 Al 2 O 54 (BSTA) and Ca 0.6 Sm 0.27 Ti 0.8 Al 0.27 O 3 (CSTA) ceramics have large resonant frequency temperature coefficients ( τ f ) with opposite signs. The composites of the two are expected to have good dielectric properties , but there will be obvious diffusion when they are compounded with each other by sintering after directly mixing the raw powder, which would lead to severe deterioration in dielectric properties. In this work, the undesired diffusion can be effectively avoided by stacking two or three ceramic layers together, which are achieved by two methods named adhesive bonding and spark-plasma-sintering (SPS) cofiring. The finite element method (FEM) analysis with COMSOL Multiphysics proposed in this work can precisely predict the microwave dielectric properties of layered ceramics, helping to determine the ratio of different layers to reach near-zero τ f . The adhesive-bonded layered ceramics exhibit excellent dielectric properties: ε r = 62.2, Q × f = 21,400 GHz, and τ f = –0.7 ppm/°C. The SPS-cofired layered ceramics can be fabricated in one time, partially solving the problem of sintering mismatch between different layers, together with superior properties of ε r = 59.8, Q × f = 19,780 GHz, and τ f = –0.6 ppm/°C. These layered ceramics could fill the gap of high- Q and temperature-stable K60 microwave dielectric ceramics. The layer-stacking process and related FEM simulations can be used to design more high- Q and temperature-stable microwave dielectric ceramics and devices.
研究领域:
材料科学
·
陶瓷
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微波工程
·
介电材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）