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arXiv 2022年

作者： Tebeneva, Tatiana S. Shitikov, Artem E. Benderov, Oleg V. Lobanov, Valery E. Bilenko, Igor A. Rodin, Alexander V. Russian Quantum Center Skolkovo143026 Russia Moscow Institute of Physics and Technology Dolgoprudny141701 Russia Institute for Theoretical and Applied Electromagnetics Russian Academy of Science Moscow125412 Russia Faculty of Physics Lomonosov Moscow State University Moscow119991 Russia

The advantages of high-quality-factor whispering gallery mode microresonators can be applied to develop novel photonic devices for the mid-IR range. ZBLAN (glass based on heavy metal fluorides) is one of the most promising materials to be used for this purpose due to low optical losses in the mid-IR. We developed original fabrication method based on melting of commercially available ZBLAN-based optical fiber to produce high-Q ZBLAN microspheres with the diameters of 250 to 350 µm. We effectively excited whispering gallery modes in these microspheres and demonstrated high quality factor both at 1.55 µm and 2.64 µm. Intrinsic quality factor at telecom wavelength was shown (5.4 ± 0.4) · 108 which is defined by the material losses in ZBLAN. In the mid-IR at 2.64 µm we demonstrated record quality factor in ZBLAN exceeding 108 which is comparable to the highest values of the Q-factor among all materials in the mid-IR. © 2022, CC BY.

关键词： Microspheres

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Quadrupolar Excitons in MoSe2 Bilayers

arXiv

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arXiv 2024年

作者： Jasiński, Jakub Hagel, Joakim Brem, Samuel Wietek, Edith Taniguchi, Takashi Watanabe, Kenji Chernikov, Alexey Bruyant, Nicolas Dyksik, Mateusz Surrente, Alessandro Baranowski, Michal Maude, Duncan K. Malic, Ermin Plochocka, Paulina Department of Experimental Physics Faculty of Fundamental Problems of Technology Wroclaw University of Science and Technology Wroclaw50-370 Poland Laboratoire National des Champs Magnétiques Intenses EMFL CNRS UPR 3228 Université Grenoble Alpes Université Toulouse Université Toulouse 3 INSA-T Grenoble and Toulouse France Department of Physics Chalmers University of Technology Gothenburg412 96 Sweden Department of Physics Philipps-Universität Marburg Renthof Marburg7 35032 Germany Institute of Applied Physics and Würzburg-Dresden Cluster of Excellence ct.qmat Technische Universität Dresden Dresden01062 Germany Research Center for Materials Nanoarchitectonics National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan Research Center for Electronic and Optical Materials National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan

The quest for platforms to generate and control exotic excitonic states has greatly benefited from the advent of transition metal dichalcogenide (TMD) monolayers and their heterostructures. Among the unconventional excitonic states, quadrupolar excitons – a superposition of two dipolar excitons with anti-aligned dipole moments – are of great interest for applications in quantum simulations and for the investigation of many-body physics. Here, we unambiguously demonstrate the emergence of quadrupolar excitons in natural MoSe2 homobilayers, whose energy shifts quadratically in electric field. In contrast to trilayer systems, MoSe2 homobilayers have many advantages, which include a larger coupling between dipolar excitons. Our experimental observations are complemented by many-particle theory calculations offering microscopic insights in the formation of quadrupolar excitons. Our results suggest TMD homobilayers as ideal platform for the engineering of excitonic states and their interaction with light and thus candidate for carrying out on-chip quantum simulations. © 2024, CC BY-NC-ND.

关键词： Electric fields

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The research on CO oxidation over Ce–Mn oxides: The preparation method effects and oxidation mechanism

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Chemosphere 2023年第1期336卷 139130页

作者： Ye, Zhiping Liu, Yang Nikiforov, Anton Ji, Jiayu Zhao, Bo Wang, Jiade College of Environment Zhejiang University of Technology 18 Chaowang RD Hangzhou310014 China Ghent University Faculty of Engineering Department of Applied Physics Research Unit Plasma Technology Sint-Pietersnieuwstraat 41 Ghent9000 Belgium Zhejiang Tuna Environmental Science & Technology Co. Ltd Shaoxing312071 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China

A series of CeO2-MnOx for highly efficient catalytical oxidation of carbon monoxide were prepared by citrate sol-gel (C), hydrothermal (H) and hydrothermal-citrate complexation (CH) methods. The outcome indicates that the catalyst generated using the CH technique (CH-1:8) demonstrated the greatest catalytic performance for CO oxidation with a T50 of 98 °C, and also good stability in 1400 min. Compared to the catalysts prepared by C and H method, CH-1:8 has the highest specific surface of 156.1 m2 g−1, and the better reducibility of CH-1:8 was also observed in CO-TPR. It is also observed the high ratio of adsorbed oxygen/lattice oxygen (1.5) in the XPS result. Moreover, characterizations by the TOF-SIMS method indicated that obtained catalyst CH–Ce/Mn = 1:8 had stronger interactions between Ce and Mn oxides, and the redox cycle of Mn3++Ce4+ ↔ Mn4++Ce3+ was a key process for CO adsorption and oxidation process. According to in-situ FTIR, the possible reaction pathway for CO was deduced in three ways. CO directly oxidize with O2 to CO2, CO adsorbed on Mn4+ and Ce3+ reacts with O to form intermediates (COO−) (T > 50 °C) and carbonates (T > 90 °C), which are further oxidized into CO2. © 2023 Elsevier Ltd

关键词： Catalysts

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26.75 cm^(2) organic solar modules demonstrate a certified efficiency of 14.34%

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Journal of Semiconductors 2022年第10期43卷 7-27页

作者： Erming Feng Yunfei Han Jianhui Chang Hengyue Li Keqing Huang Lixiu Zhang Qun Luo Jidong Zhang Changqi Ma Yingping Zou Liming Ding Junliang Yang Hunan Key Laboratory for Super-Microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Printable Electronics Research Center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China College of Engineering and Computer Science Australian National UniversityCanberra 2600Australia Center for Excellence in Nanoscience Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022China College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Organic solar cells(OSCs)have been developed rapidly in past years,due to the fast evolution of wide-bandgap copoly-mer donors and low-bandgap non-fullerene acceptors[1−9].At present,the highest power conversion efficiencies(PCEs)for single-junction OSCs and tandem OSCs exceed 19%and 20%,respectively[10,11].These OSCs are typically fabricated by us-ing low-boiling-point solvent chloroform(CF)with an effect-ive area<0.1 cm^(2).The doctor-blading deposition is the most advantageous technique to fabricate OSCs with low-boiling-point solvent for upscaling lab cells to industrial-scale mod-ules[12],exhibiting simple operation,low cost,and high materi-al utilization[13−15].Herein,a typical OSC material system PM6:Y6(Fig.1(a))was used to fabricate OSCs modules via doc-tor-blading deposition in ambient condition,and the influ-ence of the ambient temperature and substrate temperature on the film quality was investigated.

关键词： ambient modules boiling

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A Hybrid Machine Learning Model for Classifying Gene Mutations in Cancer using LSTM, BiLSTM, CNN, GRU, and GloVe

arXiv

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arXiv 2023年

作者： Aburass, Sanad Dorgham, Osama Al Shaqsi, Jamil Department of Computer Science Maharishi International University FairfieldIA United States Department of Computer Science Luther College DecorahIA United States Prince Abdullah bin Ghazi Faculty of Information and Communication Technology Al-Balqa Applied University Al-Salt19117 Jordan School of Information Technology Skyline University College University City of Sharjah P.O. Box 1797 Sharjah United Arab Emirates Information Systems Department Sultan Qaboos University Oman

In our study, we introduce a novel hybrid ensemble model that synergistically combines LSTM, BiLSTM, CNN, GRU, and GloVe embeddings for the classification of gene mutations in cancer. This model was rigorously tested using Kaggle's Personalized Medicine: Redefining Cancer Treatment dataset, demonstrating exceptional performance across all evaluation metrics. Notably, our approach achieved a training accuracy of 80.6%, precision of 81.6%, recall of 80.6%, and an F1 score of 83.1%, alongside a significantly reduced Mean Squared Error (MSE) of 2.596. These results surpass those of advanced transformer models and their ensembles, showcasing our model's superior capability in handling the complexities of gene mutation classification. The accuracy and efficiency of gene mutation classification are paramount in the era of precision medicine, where tailored treatment plans based on individual genetic profiles can dramatically improve patient outcomes and save lives. Our model's remarkable performance highlights its potential in enhancing the precision of cancer diagnoses and treatments, thereby contributing significantly to the advancement of personalized healthcare. © 2023, CC BY.

关键词： Classification (of information)

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NO FORMATION OF A NEW PHASE FOR A FREE BOUNDARY PROBLEM IN COMBUSTION THEORY

arXiv

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arXiv 2024年

作者： Furukawa, Ken Giga, Yoshikazu Kajiwara, Naoto Faculty of Science Academic Assembly University of Toyama 3190 Gofuku Toyama-shi Toyama930-8555 Japan Graduate School of Mathematical Sciences The University of Tokyo 3-8-1 Komaba Meguro-ku Tokyo153-8914 Japan Applied Physics Course Department of Electrical Electronic and Computer Engineering Gifu University 1-1 Yanagido Gifu501-1193 Japan

We consider a free boundary problem for the heat equation with a given non-negative external heat source. On the free boundary, we impose the zero Dirichlet condition and the fixed normal derivative so that heat escapes from the boundary. In various settings, we show that there exist no solutions when the initial temperature equals the fixed temperature no matter where the initial location of the free boundary is given provided that the external heat source is bounded from above. We also note that there is a chance to have a solution when the external temperature is unbounded as time tends to zero by giving a self-similar solution. Copyright © 2024, The Authors. All rights reserved.

关键词： Laplace transforms

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Design of Monopole Transparent Antenna for Satellite Internet Aboard Aircraft

Design of Monopole Transparent Antenna for Satellite Interne...

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13th International Electrical Engineering Congress, iEECON 2025

作者： Thianthong, Tawan Sangpet, Patchadaporn Mahatthanajatuphat, Chatree Tangthong, Nipont Rakluea, Chawalit Chudpooti, Nonchanutt Jangjing, Thinnawat Khongchon, Supphakon Siam Airport Ground Services Co. Ltd. 431/57 Song Prapha Rd. Don Mueang Bangkok10210 Thailand Thanyaburi Pathum Thani 12110 Thailand King Mongkut's University of Technology North Bangkok Faculty of Engineering Department of Electrical and Computer Engineering 1518 Pracharat 1 Rd.Wongsawang Bangsue Bangkok10800 Thailand King Mongkut's University of Technology North Bangkok Faculty of Applied Science Department of Industrial Physics and Medical Instrumentation 1518 Pracharat 1 Rd.Wongsawang Bangsue Bangkok10800 Thailand

ISBN: (纸本)9798331543952

This research presents the design of a transparent antenna for satellite internet aboard aircraft. The presented antenna comprises a triangular arrow monopole antenna fed by a tapered microstrip transmission line. It employs a polycarbonate composite substrate with a dielectric constant (ϵr) of 2.8 and a thickness (h) of 1 mm. The proposed transparent antenna achieves a bandwidth in the frequency range of 10.42-22.70 GHz, with an omnidirectional radiation pattern and an average gain of 2.57 dBi, effectively covering the Ku band for satellite internet applications. The antenna design was simulated using electromagnetic wave CST simulation software, and a prototype antenna was fabricated. The designed antenna exhibits a reflection coefficient of less than -10 dB throughout the 10.7-12.7 GHz frequency range, which is the operational frequency range for satellite internet and is an acceptable value in research terms. Moreover, a conductor with a thickness of 0.035 mm sits on a composite substrate material to form the antenna structure for satellite internet aboard aircraft. We need to study and apply various techniques to further enhance the antenna's performance in future designs. © 2025 IEEE.

关键词： Monopole antennas

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Light-induced circuit parameter variation in self-assembled quantum-dot photovoltaic cell

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Materials Today: Proceedings 2021年 47卷 3425-3429页

作者： Unchittha Prasatsap Suwit Kiravittaya Sasipohn Prasertpalichat Nutthaphat Thornyanadacha Zon Supachok Thainoi Somsak Panyakeow Department of Electrical and Computer Engineering Faculty of Engineering Naresuan University Phitsanulok Thailand Research Center for Academic Excellent in Applied Physics Faculty of Science Naresuan University Phitsanulok Thailand Semiconductor Device Research Laboratory (SDRL) Department of Electrical Engineering Faculty of Engineering Chulalongkorn University Bangkok Thailand Department of Physics Faculty of Science Naresuan University Phitsanulok Thailand Thai Microelectronics Center (TMEC) National Science and Technology Development Agency (NSTDA) Chachoengsao Thailand

We investigate the variations of circuit parameters of photovoltaic (PV) cells containing self-assembled InSb and GaSb quantum dots. The solar cell samples are fabricated by conventional molecular beam epitaxy on (0 0 1) GaAs substrate. The current–voltage ( I-V ) characteristics and the frequency response (10 Hz – 100 kHz) of the fabricated cell is then extracted in dark and illuminated environment. The obtained I-V curves show typical PV properties. The static series and shunt resistances can be then extracted from this measurement result. From the Nyquist plot of the device impedance, both dynamic resistance and capacitance can be further extracted. Variations of these values are quantified. Light-induced lowering of the resistance values are explained by the presence of photogenerated carriers. This work provides a useful information for both the basic understanding of PV devices and the design of electronic circuit for energy harvesting and sensing with PV cells.

关键词： Photovoltaic Quantum dot Current–voltage Frequency response Circuit parameter

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Therapeutic Effects of Silibinin on Animal Models of Skin Cancer: A Systematic Review and Meta-Analysis

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BioNanoscience 2025年第3期15卷 1-18页

作者： Mohammadi, Davood Aghayan, Amir Hossein Mohammadi, Diba Mashhadi, Mohammad Jahanbakhsh Jamalpoor, Zahra Rahdar, Abbas Pandey, Sadanand Trauma and Surgery Research Center Aja University of Medical Sciences Tehran Iran Department of Immunology School of Medicine Babol University of Medical Sciences Babol Iran Student Research Committee School of Medicine Shahroud University of Medical Science Shahroud Iran Department of Physics University of Zabol Zabol Iran School of Bioengineering and Food Technology Faculty of Applied Sciences and Biotechnology Shoolini University Solan India Department of Biotechnology Graphic Era (Deemed to be University) Dehradun India

Skin cancer represents approximately 7.5% of all cancer cases globally, with conventional therapies often associated with substantial adverse effects. Silibinin, a natural flavonolignan derived from milk thistle seeds, has demonstrated promising anti-cancer properties in preclinical studies. This meta-analysis assesses the therapeutic and preventive potential of silibinin in animal models of skin cancer. A systematic literature search was conducted across PubMed, Embase, Web of science, and Scopus databases (1990–2024) following PRISMA 2020 guidelines. Studies were selected based on PICOS criteria, with tumor volume as the primary outcome and tumor count, incidence rate, proliferating cell nuclear antigen (PCNA) expression, and body weight as secondary outcomes. Risk of bias was assessed using the SYRCLE tool. Data were synthesized using a random-effects model, and standardized mean differences (SMDs) with 95% confidence intervals (CIs) were calculated. Seven studies comprising 193 silibinin-treated and 83 control animals were included. Silibinin significantly reduced tumor volume (SMD = − 1.23; 95% CI − 1.44 to − 1.01) with no heterogeneity (I2 = 0%). Significant reductions were also observed in tumor count (SMD = − 2.41; 95% CI − 3.19 to − 1.64) and PCNA expression (SMD = − 3.61; 95% CI − 4.82 to − 2.40), while tumor incidence showed a non-significant decrease. Subgroup analyses indicated no significant differences in tumor volume reduction based on the route or timing of silibinin administration. However, topical application and pre-treatment were more effective in lowering PCNA levels. These findings suggest that silibinin holds significant potential as a preventive and therapeutic agent against skin cancer in preclinical settings.

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Observation of Su-Schrieffer-Heeger Topological Model Band Structure in Integrated LNOI Coupled Ring Cavities

Observation of Su-Schrieffer-Heeger Topological Model Band S...

引用

Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Hiep X. Dinh Armandas Balcytis Tomoki Ozawa Yasutomo Ota Toshihiko Baba Satoshi Iwamoto Arnan Mitchell Thach G. Nguyen Integrated Photonics and Applications Centre RMIT University Melbourne VIC Australia Advanced Institute for Materials Research Tohoku University Sendai Japan Department of Applied Physics and Physico-Informatics Keio University Yokohama Japan Department of Electrical and Computer Engineering Yokohama National University Yokohama Japan Research Center for Advanced Science and Technology The University of Tokyo Tokyo Japan

We report synthetic frequency dimension Su-Schrieffer-Heeger model and its band structure observation using coupled ring cavities on an integrated photonic chip. Intra-cell and inter-cell couplings between hybridized ... 详细信息

ISBN: (数字)9798350372076

ISBN: (纸本)9798350372083

关键词： Structural rings Band structures Couplings Frequency modulation Scalability Electro-optic modulators Ring lasers

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