检索结果-内蒙古大学图书馆

Interplay of Purcell Effect, Stimulated Emission, and Leaky Modes in the Photoluminescence Spectra of Microsphere Cavities

引用

Physical Review Applied 2019年第5期11卷 051001-051001页

作者： Ching-Hang Chien Shang-Hsuan Wu Trong Huynh-Buu Ngo Yia-Chung Chang Research Center for Applied Sciences Academia Sinica Taipei 115 Taiwan Nano Science and Technology Program TIGP Academia Sinica Taipei 115 Taiwan Department of Engineering and System Science National Tsing Hua University Hsinchu 300 Taiwan Department of Electrical and Computer Engineering University of Texas at Austin USA Department of Electrical and Computer Engineering University of Alberta Edmonton Alberta T6G 2V4 Canada

A theoretical model for describing the emission spectra of microsphere cavities is presented and its predictions of detailed line shapes of emission spectra associated with whispering gallery modes (WGMs) of various orders in ZnO microspheres (MSs) are verified experimentally by photoluminescence (PL) spectroscopy. The interplay of the Purcell effect, quality factor, and leaky modes in spontaneous and stimulated emission spectra related to WGMs of all orders is revealed. The key success of the theory is based on the expansion of the full Green’s function of the MS in terms of all possible resonance modes in complex frequency space, which allows incorporation of contributions from leaky modes, stimulated emission processes, and the Purcell effect. We show that the spontaneous emission spectrum calculated according to Mie theory (without the Purcell effect) is dominated by the contribution of leaky modes, while the spontaneous and stimulated emission enhanced by the Purcell effect is responsible for the main WGM resonance peaks observed experimentally. It is found that the stimulated emission peaks are doubly enhanced by their respective mode quality factor Q: one factor from the Purcell effect and the other factor from the photon number derived from the rate equation. After combining all these effects, the theory can provide a quantitative description of fine features of both TE and TM modes (including higher-order modes) observed in the PL spectra of ZnO MSs. Surprisingly, it is found that for ZnO MS with a diameter larger than 5 μm, the PL emission spectrum is dominated by higher-order modes. The quantitative understanding of the interplay of these emission mechanisms should prove useful for optimizing the performance of light-emitting devices based on microresonators.

关键词： Cavity quantum electrodynamics Lasers Light-matter interaction Optical pumping Photonics Semiconductor quantum optics Spontaneous emission Whispering gallery mode resonators

来源：评论

学校读者我要写书评

暂无评论

Carbon nanodots prepared from polyethylenimine for quantitation of salivary uric acid

Carbon nanodots prepared from polyethylenimine for quantitat...

引用

22nd International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2018

作者： Wu, Wei-Cheng Chen, Hsin-Yi Tiffany Lin, Shih-Chi Chen, Hsin-Ying Chen, Fu-Rong Chang, Huan-Tsung Tseng, Fan-Gang Department of Engineering and System Science National Tsing Hua University Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica Taiwan Research Center for Applied Sciences Academia Sinica Taiwan Department of Chemistry National Taiwan University Taiwan Department of Chemistry Chung Yuan Christian University Taiwan

ISBN: (纸本)9781510897571

Salivary uric acid is regarded as a noninvasive biomarker of metabolic syndrome and renal disorder. Although many enzyme based assays have been developed for quantitation of uric acids, most of the biological reagents are only stable for 30 days after opening even stored at 2-8 °C. To overcome this short-lasting problem, long-lasting (more than two years), easily stored and cost-effective nonenzymatic C-dots prepared from PEI through a simple hydrothermal method were developed. Experimental results reveal that the sensitivity of the PEI C-dot assay for uric acid is higher than that of reported fluorescece and enzyme based sensors. Copyright © (2018) by Chemical and Biological Microsystems Society. All rights reserved.

关键词： nanodots

来源：评论

学校读者我要写书评

暂无评论

Observation of anti-parity-time-symmetry, phase transitions and exceptional points in an optical fibre

arXiv

引用

arXiv 2020年

作者： Bergman, Arik Duggan, Robert Sharma, Kavita Tur, Moshe Zadok, Avi Alù, Andrea Faculty of Engineering Institute for Nano-Technology and Advanced Materials Bar-Ilan University Ramat-Gan5290002 Israel Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Department of Electrical and Computer Engineering University of Texas at Austin AustinTX78712 United States School of Electrical Engineering Tel-Aviv University Tel-Aviv6997801 Israel Physics Program Graduate Center City University of New York New YorkNY10026 United States

The exotic physics emerging in non-Hermitian systems with balanced distributions of gain and loss has drawn a great deal of attention in recent years. These systems exhibit phase transitions and exceptional point singularities in their spectra, at which eigen-values and eigen-modes coalesce and the overall dimensionality is reduced. Among several peculiar phenomena observed at exceptional points, an especially intriguing property, with relevant practical potential, consists in the inherently enhanced sensitivity to small-scale perturbations. So far, however, these principles have been implemented at the expenses of precise fabrication and tuning requirements, involving tailored nano-structured devices with controlled distributions of optical gain and loss. In this work, anti-parity-time symmetric phase transitions and exceptional point singularities are demonstrated in a single strand of standard single-mode telecommunication fibre, using a setup consisting of entirely of off-the-shelf components. Two propagating signals are amplified and coupled through stimulated Brillouin scattering, which makes the process non-Hermitian and enables exquisite control over gain and loss. Singular response to small variations around the exceptional point and topological features arising around this singularity are experimentally demonstrated with large precision, enabling robustly enhanced spectral response to small-scale changes in the Brillouin frequency shift. Our findings open exciting opportunities for the exploration of non-Hermitian phenomena over a table-top setup, with straightforward extensions to higher-order Hamiltonians and applications in quantum optics, nanophotonics and sensing. Copyright © 2020, The Authors. All rights reserved.

关键词： Optical fibers

来源：评论

学校读者我要写书评

暂无评论

Skeletal Muscle Regeneration: Functional Skeletal Muscle Regeneration with Thermally Drawn Porous Fibers and Reprogrammed Muscle Progenitors for Volumetric Muscle Injury (Adv. Mater. 14/2021)

引用

Advanced Materials 2021年第14期33卷

作者： Yoonhee Jin Dena Shahriari Eun Je Jeon Seongjun Park Yi Sun Choi Jonghyeok Back Hyungsuk Lee Polina Anikeeva Seung-Woo Cho Department of Biotechnology Yonsei University Seoul 03722 Republic of Korea Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA 02139 USA McGovern Institute for Brain Research Cambridge MA 02139 USA Department of Biomaterials Science and Engineering Yonsei University Seoul 03722 Republic of Korea Department of Bio and Brain Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea KAIST Institute for Health Science and Technology Daejeon 34141 Republic of Korea School of Mechanical Engineering Yonsei University Seoul 03722 Republic of Korea Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA Department of Brain and Cognitive Sciences Massachusetts Institute of Technology Cambridge MA 02139 USA Center for Nanomedicine Institute for Basic Science (IBS) Seoul 03722 Republic of Korea Graduate Program of Nano Biomedical Engineering (NanoBME) Advanced Science Institute Yonsei University Seoul 03722 Republic of Korea

来源：评论

学校读者我要写书评

暂无评论

Comparative analyses for plant virus-based cancer immunotherapy drug development

Cell Biomaterials

引用

Cell Biomaterials 2025年

作者： Anthony O. Omole Hannah S. Newton Edward Cedrone Kimia Nematpour Shaojun Xie Yongmei Zhao Bao Tran Marina A. Dobrovolskaia Nicole F. Steinmetz Aiiso Yufeng Li Family Department of Chemical and Nano Engineering University of California San Diego La Jolla San Diego CA 92093 USA Shu and K.C. Chien and Peter Farrell Collaboratory University of California San Diego La Jolla San Diego CA 92093 USA Center for Nano-ImmunoEngineering University of California San Diego La Jolla San Diego CA 92093 USA Moores Cancer Center University of California San Diego La Jolla San Diego CA 92093 USA Nanotechnology Characterization Lab Cancer Research Technology Program Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute Frederick MD 21702 USA Sequencing Facility Bioinformatics Group Biomedical Informatics and Data Science Directorate Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute Frederick MD 21702 USA CCR Sequencing Facility Cancer Research Technology Program Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute Frederick MD 21702 USA Department of Bioengineering University of California San Diego La Jolla San Diego CA 92093 USA Department of Radiology University of California San Diego La Jolla San Diego CA USA Institute for Materials Discovery and Design University of California San Diego La Jolla San Diego CA 92093 USA Center for Engineering in Cancer Institute of Engineering Medicine University of California San Diego La Jolla San Diego CA 92093 USA

Cowpea mosaic virus (CPMV) is a plant virus with potent anti-tumor efficacy. Intratumoral CPMV, but not cowpea chlorotic mottle virus (CCMV), reprograms the tumor microenvironment priming durable, systemic anti-tumor immunity. Here, we performed a side-by-side mechanism of action comparison between CPMV and CCMV. Through immune-multiplexing and trafficking studies we observed that CPMV and CCMV are taken up by innate immune cells at similar rates but are processed differently. While CCMV induces proinflammatory interleukins 22, 23, and 27, CPMV is a strong inducer of type I, II, and III interferons, which contribute to the activation and enhancement of immune cell function. We observed that CPMV RNAs activate Toll-like receptor (TLR) 7 upon delivery—and not CCMV RNAs; CPMV RNAs persist longer within cells compared with CCMV. Taken together, this work identifies determinants for CPMV’s unique mechanism for intratumoral immunotherapy. It also broadens our understanding of the utility of plant viruses for biomedical applications.

关键词： plant viruses intratumoral immunotherapy cowpea mosaic virus cowpea chlorotic mottle virus cancer nanotechnology

来源：评论

学校读者我要写书评

暂无评论

Correction: Solventless thermal crosslinked polymer protective layer for high stable lithium metal batteries

引用

Sustainable Energy & Fuels 2020年第2期4卷 952-952页

作者： Hyunjin Kim Youn Sang Kim Jeeyoung Yoo Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 151-744 Republic of Korea Advanced Institutes of Convergence Technology 864-1 Iui-dong Yeongtong-gu Suwon-si Gyeonggi-do 443-270 Republic of Korea School of Energy Engineering Kyungpook National University Daegu 41566 Republic of Korea

Correction for ‘Solventless thermal crosslinked polymer protective layer for high stable lithium metal batteries’ by Hyunjin Kim et al., Sustainable Energy Fuels, 2020, DOI: 10.1039/c9se01046g.

Correction for ‘Solventless thermal crosslinked polymer protective layer for high stable lithium metal batteries’ by Hyunjin Kim et al., Sustainable Energy Fuels, 2020, DOI: 10.1039/c9se01046g.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Effects of Flexoelectricity and Ion on the Flicker of Fringe Field Switching Liquid Crystal Display

Effects of Flexoelectricity and Ion on the Flicker of Fringe...

引用

SID Symposium, Seminar, and Exhibition 2018, Display Week 2018

作者： Jiang, Yingfei Zhou, Xiaochen Qin, Guangkui Xu, Xiaoguang Lee, Seunghee Yang, Deng-Ke Chemical Physics Interdisciplinary Program Liquid Crystal Institute Kent State University KentOH44242 United States BOE Technology Group Co No. 9 Dize RD BDA Beijing100171 China Department of Polymer Nano-Science and Technology Chonbuk National University Jeonbuk Jeonju561-756 Korea Republic of

ISBN: (纸本)9781510867659

Although LCDs are the leading technology for flat panel displays, their energy efficiency is low. One way to improve the energy efficiency is to decrease the driving frequency when static images are displayed. As the driving frequency is decreased, the transmittance of the display may vary with time, known as flickering. We carried out both experimental and simulation studies to investigate the origins that cause the flickering problem. Our results show that flexoelectric effect caused by non-uniform liquid crystal director configurations and ions in the liquid crystal are the main factors responsible for the flickering. We quantitatively analyzed the flickering caused by the two factors. © 2018 SID.

关键词： Ions

来源：评论

学校读者我要写书评

暂无评论

Publisher Correction: Atomistic insights into highly active reconstructed edges of monolayer 2H-WSe2 photocatalyst

引用

Nature communications 2022年第1期13卷 1755页

作者： Mohammad Qorbani Amr Sabbah Ying-Ren Lai Septia Kholimatussadiah Shaham Quadir Chih-Yang Huang Indrajit Shown Yi-Fan Huang Michitoshi Hayashi Kuei-Hsien Chen Li-Chyong Chen Center for Condensed Matter Sciences National Taiwan University Taipei 10617 Taiwan. Center of Atomic Initiative for New Materials National Taiwan University Taipei 10617 Taiwan. Institute of Atomic and Molecular Sciences Academia Sinica Taipei 10617 Taiwan. On leave from Tabbin Institute for Metallurgical Studies Tabbin Helwan 109 Cairo 11421 Egypt. Department of Physics National Taiwan University Taipei 10617 Taiwan. Nano Science and Technology Taiwan International Graduate Program Academia Sinica Taipei 11529 Taiwan. Institute of Physics Academia Sinica Taipei 11529 Taiwan. Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 11529 Taiwan. Department of Physics National Central University Taoyuan City 32001 Taiwan. International Graduate Program of Molecular Science and Technology National Taiwan University Taipei 10617 Taiwan. Department of Chemistry Hindustan Institute of Technology and Science Chennai 603103 India. Center for Condensed Matter Sciences National Taiwan University Taipei 10617 Taiwan. chenkh@pub.iams.sinica.edu.tw. Institute of Atomic and Molecular Sciences Academia Sinica Taipei 10617 Taiwan. chenkh@pub.iams.sinica.edu.tw. Center for Condensed Matter Sciences National Taiwan University Taipei 10617 Taiwan. chenlc@ntu.edu.tw. Center of Atomic Initiative for New Materials National Taiwan University Taipei 10617 Taiwan. chenlc@ntu.edu.tw. Department of Physics National Taiwan University Taipei 10617 Taiwan. chenlc@ntu.edu.tw.

来源：评论

学校读者我要写书评

暂无评论

Curved copper nanowires-based robust flexible transparent electrodes via all-solution approach

引用

nano Research 2017年第9期10卷 3077-3091页

作者： Zhenxing Yin Seung Keun Song Sanghun Cho Duck-Jae You Jeeyoung Yoo Suk Tai Chang Youn Sang Kim Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 08826 Republic of Korea School of Chemical Engineering and Materials Science Chung-Ang University Seou106974 Republic of Korea Advanced Institutes of Convergence Technology 145 Gwanggyo-ro Yeongtong-gu Suwon-si Gyeonggi-do 16229 Republic of Korea

Curved Cu nanowire (CCN)-based high-performance flexible transparent conductive electrodes (FTCEs) were fabricated via a fully solution-processed approach, involving synthesis, coating, patterning, welding, and transfer. Each step involved an innovative technique for completing the all-solution processes. The high-quality and well-dispersed CCNs were synthesized using a multi-polyol method through the synergistic effect of specific polyol reduction. To precisely control the optoelectrical properties of the FTCEs, the CCNs were uniformly coated on a polyimide (PI) substrate via a simple meniscus-dragging deposition method by tuning several coating parameters. We also employed a polyurethane (PU)-stamped patterning method to effectively produce 20 μm patterns on CCN thin films. The CCN thin films exhibited high electrical performance, which is attributed to the deeply percolated CCN network formed via a solvent-dipped welding method. Finally, the CCN thin films on the PI substrate were partially embedded and transferred to the PU matrix to reduce their surface roughness. Through consecutive processes involving the proposed methods, a highly percolated CCN thin film on the PU matrix exhibited high optoelectrical performance (R s = 53.48 Ω/□ at T = 85.71%), excellent mechanical properties (R/R 0 < 1.10 after the 10th repetition of tape peeling or 1,000 bending cycles), and a low root-mean-square surface roughness (R rms = 14.36 nm).

关键词： curved Cu nanowires all-solution processes 20 μm patterns high performance transparent electrode

来源：评论

学校读者我要写书评

暂无评论

Carbon sequestration in mangrove ecosystems: Sources, transportation pathways, influencing factors, and its role in the carbon budget

引用

Earth-science Reviews 2025年

作者： Shafiqa Ali Gobinda Dey Nguyen Hoang Kim Nuonga Abdur Rahman Liang-Chi Wang Uttara Sukul Koyeli Das Raju Kumar Sharma Shan-Li Wang Chien Yen Chen Department of Earth and Environmental Sciences National Chung Cheng University 168 University Road Min-Hsiung Chiayi County 62102 Taiwan Doctoral Program in Science Technology Environment and Mathematics National Chung Cheng University 168 University Road Min-Hsiung Chiayi County 62102 Taiwan Department of Agricultural Chemistry National Taiwan University Taipei 106319 Taiwan Environment and Disaster Monitoring Center National Chung Cheng University Chiayi 621 Taiwan Department of Biomedical Sciences Graduate Institute of Molecular Biology National Chung Cheng University 168 University Road Ming-Shung Chiayi County 62102 Taiwan Department of Chemistry and Biochemistry National Chung Cheng University 168 University Road Min-Hsiung Chiayi County 62102 Taiwan Center for Nano Bio-Detection Center for Innovative Research on Aging Society AIM-HI National Chung Cheng University 168 University Road Min-Hsiung Chiayi County 62102 Taiwan You-Cheng Engineering & Technology Co. Ltd 168 University Road Min-Hsiung Chiayi County 62102 Taiwan

Global efforts to mitigate climate change emphasize the critical need to reduce atmospheric CO₂ levels and enhance carbon sinks. Mangrove ecosystems, renowned for their substantial carbon sequestration capacity, play a vital role in sequestering significant amounts of carbon. This review explores carbon fluxes in mangrove ecosystems, emphasizing autochthonous and allochthonous carbon sequestration mechanisms. Specifically, it discusses the pathways through which carbon is absorbed and stored, including biological productivity, sediment accumulation, and carbonate precipitation. Furthermore, the role of microbial communities and root systems in carbon stabilization, nutrient cycling, and methane oxidation is also examined, highlighting their significance in enhancing sequestration efficiency. Moreover, this study evaluates the factors influencing carbon sequestration efficiency in mangroves and the methods used for its quantification. Finally, this review assesses the contribution of mangroves to the global carbon budget, emphasizing their strategic role in offsetting atmospheric CO 2 and enhancing coastal ecosystem resilience. However, significant research gaps remain in understanding the mechanism of carbon transformation, the interaction between diverse carbon sources, sediment dynamics, and long-term stability of buried organic matter across varying mangrove settings.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：