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Advanced materials 2021年第21期33卷

作者： Fei Xue Xin He Zhenyu Wang José Ramón Durán Retamal Zheng Chai Lingling Jing Chenhui Zhang Hui Fang Yang Chai Tao Jiang Weidong Zhang Husam N. Alshareef Zhigang Ji Lain-Jong Li Jr-Hau He Xixiang Zhang Physical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia National Key Laboratory of Science and Technology on Micro/Nano Fabrication Shanghai Jiao Tong University Shanghai 200240 China Computer Electrical and Mathematical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia Department of Electronics and Electrical Engineering Liverpool John Moores University Liverpool L3 3AF UK Computer Science Department Loughborough University Loughborough LE11 3TU UK Department of Applied Physics The Hong Kong Polytechnic University Kowloon Hong Kong China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China Department of Materials Science and Engineering University of New South Wales Kensington NSW 2052 Australia Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong China

Spin-Induced Linear Polarization of Excitonic Emission in Antiferromagnetic van der Waals Crystals

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arXiv 2020年

作者： Wang, Xingzhi Cao, Jun Lu, Zhengguang Cohen, Arielle Kitadai, Hikari Li, Tianshu Wilson, Matthew Lui, Chun Hung Smirnov, Dmitry Sharifzadeh, Sahar Ling, Xi Department of Chemistry Boston University BostonMA02215 United States National High Magnetic Field Laboratory TallahasseeFL32310 United States Department of Physics Florida State University TallahasseeFL32306 United States Division of Materials Science and Engineering Boston University BostonMA02215 United States Department of Physics and Astronomy University of California RiversideCA92521 United States Department of Electrical and Computer Engineering Boston University BostonMA02215 United States Department of Physics Boston University BostonMA02215 United States Photonics Center Boston University BostonMA02215 United States

Antiferromagnets display enormous potential in spintronics owing to its intrinsic nature, including terahertz resonance1,2, multilevel states3,4, and absence of stray fields5,6. Combining with the layered nature, van der Waals (vdW) antiferromagnets hold the promise in providing new insights and new designs in two-dimensional (2D) spintronics. The zero net magnetic moments of vdW antiferromagnets strengthens the spin stability, however, impedes the correlation between spin and other excitation elements, like excitons7,8. Such coupling is urgently anticipated for fundamental magneto-optical studies and potential opto-spintronic devices. Here, we report an ultra-sharp excitonic emission with excellent monochromaticity in antiferromagnetic nickel phosphorus trisulfides (NiPS3) from bulk to atomically thin flakes. We prove that the linear polarization of the excitonic luminescence is perpendicular to the ordered spin orientation in NiPS3. By applying an in-plane magnetic field to alter the spin orientation, we further manipulate the excitonic emission polarization. Such strong correlation between exciton and spins provides new insights for the study of magneto-optics in 2D materials, and hence opens a path for developing opto-spintronic devices and antiferromagnet-based quantum information technologies. Copyright © 2020, The Authors. All rights reserved.

关键词： Van der Waals forces

A Clinician-Friendly Platform for Ophthalmic Image Analysis Without Technical Barriers

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arXiv 2025年

作者： Wang, Meng Lin, Tian Hou, Qingshan Lin, Aidi Wang, Jingcheng Peng, Qingsheng Nguyen, Truong X. Fang, Danqi Zou, Ke Xu, Ting Xue, Cancan Quek, Ten Cheer Yu, Qinkai Liu, Minxin Zhou, Hui Xiao, Zixuan He, Guiqin Liang, Huiyu Shi, Tingkun Chen, Man Liu, Linna Peng, Yuanyuan Wang, Lianyu Hu, Qiuming Chen, Junhong Zhang, Zhenhua Chen, Cheng Zhao, Yitian Liu, Dianbo Wu, Jianhua Chen, Xinjian Zhang, Changqing Nguyen, Triet Thanh Meng, Yanda Zheng, Yalin Tham, Yih Chung Cheung, Carol Y. Fu, Huazhu Chen, Haoyu Cheng, Ching-Yu Centre for Innovation and Precision Eye Health Yong Loo Lin School of Medicine National University of Singapore Singapore119228 Singapore Department of Ophthalmology Yong Loo Lin School of Medicine National University of Singapore Singapore119228 Singapore Joint Shantou International Eye Center Shantou University The Chinese University of Hong Kong Guangdong Shantou515041 China Shantou University Medical College Guangdong Shantou515041 China School of Computer Science and Engineering Northeastern University Liaoning Shenyang110819 China Big Vision Medical Technology Ltd. Suzhou215011 China Singapore Eye Research Institute Singapore National Eye Centre Singapore169856 Singapore Department of Ophthalmology and Visual Sciences The Chinese University of Hong Kong 999077 Hong Kong Binh Dinh Eye Hospital Viet Nam Department of Computer Science University of Exeter ExeterEX4 4RN United Kingdom University of Science and Technology Hospital Guangdong Shenzhen518000 China Shenzhen Qianhai Shekou Free Trade Zone Hospital Guangdong Shenzhen518000 China Department of Ophthalmology Meizhou People’s Hospital Meizhou Academy of Medical Sciences Guangdong Meizhou514000 China Department of Ophthalmology Yeungnam University College of Medicine Daegu42417 Korea Republic of Aier Eye Hospital of Wuhan University Hubei Wuhan430000 China School of Biomedical Engineering Anhui Medical University Anhui Hefei230032 China College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Jiangsu Nanjing211100 China Guangxi Jingliang Eye Hospital Guangxi Nanning530021 China Puning People’s Hospital Guangdong Jieyang522000 China Shandong Qingdao266042 China Department of Electrical and Electronic Engineering the University of Hong Kong Hong Kong Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Zhejiang Ningbo315201 China School of Electronics and Information Engineering Soochow University

Artificial intelligence (AI) shows remarkable potential in medical imaging diagnostics, but current models typically require retraining when deployed across different clinical centers, limiting their widespread adoption. We introduce GlobeReady, a clinician-friendly AI platform that enables ocular disease diagnosis without retraining/fine-tuning or technical expertise. GlobeReady achieves high accuracy across imaging modalities: 93.9–98.5% for an 11-category fundus photo dataset and 87.2–92.7% for a 15-category OCT dataset. Through training-free local feature augmentation, it addresses domain shifts across centers and populations, reaching an average accuracy of 88.9% across five centers in China, 86.3% in Vietnam, and 90.2% in the UK. The built-in confidence-quantifiable diagnostic approach further boosted accuracy to 94.9–99.4% (fundus) and 88.2–96.2% (OCT), while identifying out-of-distribution cases at 86.3% (49 CFP categories) and 90.6% (13 OCT categories). Clinicians from multiple countries rated GlobeReady highly (average 4.6 out of 5) for its usability and clinical relevance. These results demonstrate GlobeReady’s robust, scalable diagnostic capability and potential to support ophthalmic care without technical barriers. © 2025, CC0.

关键词： Ophthalmology

Erratum: “Two-dimensional porous graphitic carbon nitride C6N7 monolayer: First-principles calculations” [Appl. Phys. Lett. 119, 142102 (2021)]

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Applied Physics Letters 2022年第18期120卷

作者： A. Bafekry M. Faraji M. M. Fadlallah I. Abdolhosseini Sarsari H. R. Jappor S. Fazeli M. Ghergherehchi 1Department of Radiation Application Shahid Beheshti University Tehran Iran 2Micro and Nanotechnology Graduate Program TOBB University of Economics and Technology Sogutozu Caddesi No 43 Sogutozu 06560 Ankara Turkey 3Department of Physics Faculty of Science Benha University 13518 Benha Egypt 4Department of Physics Isfahan University of Technology Isfahan 84156-83111 Iran 5Department of Physics College of Education for Pure Sciences University of Babylon Hilla Iraq 6Department of Material Science and Engineering Sharif University of Technology PO Box 11155-9466 Tehran Iran 7Department of Electrical and Computer Engineering Sungkyunkwan University 16419 Suwon South Korea

The original article1 contains misprints in the values of the elastic parameters. The values of C11 = 258.6 GPa, C22 = 290.8 GPa, and C12 = 70.73 GPa and C13 =

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Nanoscale Strain engineering: Self-Erasable and Rewritable Optoexcitonic Platform for Antitamper Hardware (Advanced Optical materials 21/2020)

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Advanced Optical materials 2020年第21期8卷

作者： Che-Hsuan Cheng Da Seul Yang Jinsang Kim Parag B. Deotare Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48105 USA Macromolecular Science and Engineering University of Michigan Ann Arbor MI 48105 USA Department of Chemical Engineering University of Michigan Ann Arbor MI 48105 USA Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48105 USA

Inverse Design of Nanoparticles for Enhanced Raman Scattering

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arXiv 2019年

作者： Christiansen, Rasmus E. Michon, Jérôme Benzaouia, Mohammed Sigmund, Ole Johnson, Steven G. Department of Mechanical Engineering Technical University of Denmark Nils Koppels Allé Building 404 Kongens Lyngby2800 Denmark Department of Mathematics Massachusetts Institute of Technology CambridgeMA02139 United States Department of Materials Science and Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States

We show that topology optimization (TO) of metallic resonators can lead to ∼ 102× improvement in surface-enhanced Raman scattering (SERS) efficiency compared to traditional resonant structures such as bowtie antennas. TO inverse design leads to surprising structures very different from conventional designs, which simultaneously optimize focusing of the incident wave and emission from the Raman dipole. We consider isolated metallic particles as well as more complicated configurations such as periodic surfaces or resonators coupled to dielectric waveguides, and the benefits of TO are even greater in the latter case. Our results are motivated by recent rigorous upper bounds to Raman scattering enhancement, and shed light on the extent to which these bounds are achievable. Copyright © 2019, The Authors. All rights reserved.

关键词： Resonators

100pT/cm sensitive MEMS resonant magnetometer from a commercial accelerometer

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arXiv 2019年

作者： Javor, Josh Stange, Alexander Pollock, Corey Fuhr, Nicholas Bishop, David J. Department of Mechanical Engineering Boston University BostonMA02215 United States Division of Materials Science and Engineering Boston University BostonMA02215 United States Department of Electrical and Computer Engineering Boston University BostonMA02215 United States Department of Physics Boston University BostonMA02215 United States Department of Biomedical Engineering Boston University BostonMA02215 United States

Magnetic sensing is present in our everyday interactions with consumer electronics, and also demonstrates potential for measurement of extremely weak biomagnetic fields, such as those of the heart and brain. In this work, we leverage the many benefits of the micro-electromechanical systems (MEMS) devices to fabricate a small, low power, inexpensive sensor whose resolution is in the range of weak biomagnetic fields. The sensor works at room temperature, and is suitable for consumer electronics integration. At present, such biomagnetic fields can only be measured by expensive mechanisms such as optical pumping and superconducting quantum interference devices (SQUIDs). Thus, our sensor suggests the opening of a large phase space for medical and consumer applications. The prototype fabrication is achieved by assembling micro-objects, including a permanent micromagnet, onto a post-release commercial MEMS accelerometer. With this system, we demonstrate a room temperature MEMS magnetometer, whose design is only sensitive to gradient magnetic fields and is generally insensitive to the Earth’s uniform field. In air, the sensor’s response is linear with a resolution of 1.1 nT cm-1 and spans over 3 decades of dynamic range to 4.6 µT cm-1. In 1 mTorr vacuum with 20 dB magnetic shielding, the sensor achieved 100 pT cm-1 resolution at resonance. The theoretical floor of this design is 110 fT cm-1 Hz-1/2 with a resolution of 13 fT cm-1, thus these devices hold promise for both magnetocardiography (MCG) and magnetoencephalography (MEG) applications. Copyright © 2019, The Authors. All rights reserved.

关键词： Magnetometers

From 3D to 4D: Integration of 3D printed structures for fabrication of multifunctional 4D biological microsensors for lab-on-a-chip and wearable applications 22

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From 3D to 4D: Integration of 3D printed structures for fabr...

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

作者： Didier, Charles Kundu, Avra Rajaraman, Swaminathan University of Central Florida OrlandoFL32828 United States Department of Materials Science and Engineering University of Central Florida OrlandoFL32828 United States Department of Electrical and Computer Engineering University of Central Florida OrlandoFL32828 United States

ISBN: (纸本)9781510897571

We present a novel method for the integration of 3D printed, dynamic, stretchable, packaged structures to realize 4D multifunctional biosensors for lab-on-a-chip and wearable sensor applications. The device incorporates 3D printed serpentine designs, with various out-of-plane structures, integrated on to a flexible Kapton® package with micromolded PDMS insulation. The flexibility of the printed design can be tuned by different resins, and structural design changes. Integration of 3D structures, LEDs, and helices followed by bending/twisting analysis depict the capability of the device to return naturally to its resting state (and hence 4D functionality). 3D microelectrode impedance measurements are additionally demonstrated. Copyright © (2018) by Chemical and Biological Microsystems Society. All rights reserved.

关键词： 3D printers

Ultrastrong magnon-magnon coupling dominated by antiresonant interactions

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arXiv 2020年

作者： Makihara, Takuma Hayashida, Kenji Noe, G. Timothy Li, Xinwei Peraca, Nicolas Marquez Ma, Xiaoxuan Jin, Zuanming Ren, Wei Ma, Guohong Katayama, Ikufumi Takeda, Jun Nojiri, Hiroyuki Turchinovich, Dmitry Cao, Shixun Bamba, Motoaki Kono, Junichiro Department of Physics and Astronomy Rice University HoustonTX United States Department of Electrical and Computer Engineering Rice University HoustonTX United States Division of Applied Physics Graduate School Faculty of Engineering Hokkaido University Sapporo Hokkaido060-8628 Japan Department of Physics International Center of Quantum and Molecular Structures and Materials Genome Institute Shanghai University Shanghai200444 China Terahertz Technology Innovation Research Institute Terahertz Spectrum and Imaging Technology Cooperative Innovation Center Shanghai Key Lab of Modern Optical System University of Shanghai for Science and Technology 516 JunGong Road Shanghai200093 China Department of Physics Graduate School of Engineering Science Yokohama National University Yokohama Japan Institute for Materials Research Tohoku University Sendai Japan Fakultät für Physik Universität Bielefeld Universitätsstr. 25 Bielefeld33615 Germany Department of Physics Kyoto University Sakyo-ku Kyoto606-8502 Japan PRESTO Japan Science and Technology Agency Saitama332-0012 Japan Department of Materials Science and NanoEngineering Rice University HoustonTX United States

Exotic quantum vacuum phenomena are predicted in cavity quantum electrodynamics (QED) systems with ultrastrong light-matter interactions. Their ground states are predicted to be vacuum squeezed states with suppressed quantum fluctuations. The source of such phenomena is antiresonant terms in the Hamiltonian, yet antiresonant interactions are typically negligible compared to resonant interactions in light-matter systems. We report an unusual, ultrastrongly coupled matter-matter system of magnons that is analytically described by a unique Hamiltonian in which the relative importance of resonant and antiresonant interactions can be easily tuned and the latter can be made vastly dominant. We found a novel regime where vacuum Bloch-Siegert shifts, the hallmark of antiresonant interactions, greatly exceed analogous frequency shifts from resonant interactions. Further, we theoretically explored the system's ground state and calculated up to 5.9 dB of quantum fluctuation suppression. These observations demonstrate that magnonic systems provide an ideal platform for exploring exotic quantum vacuum phenomena predicted in ultrastrongly coupled light-matter systems. Copyright © 2020, The Authors. All rights reserved.

关键词： Hamiltonians

Development of Efficient electrically Pumped Nanolasers based on InAlGaAs Tunnel Junction

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Development of Efficient Electrically Pumped Nanolasers base...

2018 Conference on Lasers and Electro-Optics, CLEO 2018

作者： Fang, Cheng-Yi Vallini, Felipe Amili, Abdelkrim El Tukiainen, Antti Lyytikainen, Jari Guina, Mircea Fainman, Yeshaiahu Materials Science and Engineering Program at University of California at San Diego San DiegoCA92093-0418 United States Department of Electrical Computer Engineering University of California San Diego San DiegoCA92037 United States Optoelectronic Research Centre Tampere University of Technology Tampere33101 Finland

We propose and experimentally demonstrate a metallo-dielectric nanolasers utilizing an InAlGaAs tunnel junction for efficient carrier injection, which reduce the complexity when optimizing the metal contact, and reduc... 详细信息

ISBN: (纸本)9781943580422

关键词： Junctions Metals Resistance Optical pumping Indium phosphide III-V semiconductor materials Temperature measurement"