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  1. Article ; Online: Time-modulated near-field radiative heat transfer.

    Yu, Renwen / Fan, Shanhui

    Proceedings of the National Academy of Sciences of the United States of America

    2024  Volume 121, Issue 17, Page(s) e2401514121

    Abstract: Near-field radiative heat transfer has recently attracted increasing interests for its applications in energy technologies, such as thermophotovoltaics. Existing works, however, are restricted to time-independent systems. Here, we explore near-field ... ...

    Abstract Near-field radiative heat transfer has recently attracted increasing interests for its applications in energy technologies, such as thermophotovoltaics. Existing works, however, are restricted to time-independent systems. Here, we explore near-field radiative heat transfer between two bodies under time modulation by developing a rigorous fluctuational electrodynamics formalism. We demonstrate that time modulation can result in the enhancement, suppression, elimination, or reversal of radiative heat flow between the two bodies, and can be used to create a radiative thermal diode with an infinite contrast ratio, as well as a near-field radiative heat engine that pumps heat from the cold to the hot bodies. The formalism reveals a fundamental symmetry relation in the radiative heat transfer coefficients that underlies these effects. Our results indicate the significant capabilities of time modulation for managing nanoscale radiative heat flow.
    Language English
    Publishing date 2024-04-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2401514121
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  2. Article ; Online: Manipulating Coherence of Near-Field Thermal Radiation in Time-Modulated Systems.

    Yu, Renwen / Fan, Shanhui

    Physical review letters

    2023  Volume 130, Issue 9, Page(s) 96902

    Abstract: We show that the spatial coherence of thermal radiation can be manipulated in time-modulated photonic systems supporting surface polaritons. We develop a fluctuational electrodynamics formalism for such systems to calculate the cross-spectral density ... ...

    Abstract We show that the spatial coherence of thermal radiation can be manipulated in time-modulated photonic systems supporting surface polaritons. We develop a fluctuational electrodynamics formalism for such systems to calculate the cross-spectral density tensor of the emitted thermal electromagnetic fields in the near-field regime. Our calculations indicate that, due to time-modulation, spatial coherence can be transferred between different frequencies, and correlations between different frequency components become possible. All these effects are unique to time-modulated systems. We also show that the decay rate of optical emitters can be controlled in the proximity of such time-modulated structure. Our findings open a promising avenue toward coherence control in thermal radiation, dynamical thermal imaging, manipulating energy transfer among thermal or optical emitters, efficient near-field radiative cooling, and engineering spontaneous emission rates of molecules.
    Language English
    Publishing date 2023-03-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.096902
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  3. Article ; Online: Flashing light with nanophotonics.

    Yu, Renwen / Fan, Shanhui

    Science (New York, N.Y.)

    2022  Volume 375, Issue 6583, Page(s) 822–823

    Abstract: Manipulation and enhancement of scintillation is achieved in nanophotonic structures. ...

    Abstract Manipulation and enhancement of scintillation is achieved in nanophotonic structures.
    MeSH term(s) Light
    Language English
    Publishing date 2022-02-24
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abn8478
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  4. Article ; Online: Inelastic Scattering of Electron Beams by Nonreciprocal Nanotructures.

    Yu, Renwen / Konečná, Andrea / de Abajo, F Javier García

    Physical review letters

    2021  Volume 127, Issue 15, Page(s) 157404

    Abstract: Probing optical excitations with high resolution is important for understanding their dynamics and controlling their interaction with other photonic elements. This can be done using state-of-the-art electron microscopes, which provide the means to sample ...

    Abstract Probing optical excitations with high resolution is important for understanding their dynamics and controlling their interaction with other photonic elements. This can be done using state-of-the-art electron microscopes, which provide the means to sample optical excitations with combined meV-sub-nm energy-space resolution. For reciprocal photonic systems, electrons traveling in opposite directions produce identical signals, while this symmetry is broken in nonreciprocal structures. Here, we theoretically investigate this phenomenon by analyzing electron energy-loss spectroscopy (EELS) and cathodoluminescence (CL) for structures consisting of magnetically biased InAs as an instance of gyrotropic nonreciprocal material. We find that the spectral features associated with excitations of InAs films depend on the electron propagation direction in both EELS and CL, and can be tuned by varying the applied magnetic field within a relatively modest subtesla regime. The magnetic field modifies the optical field distribution of the sampled resonances, and this in turn produces a direction-dependent coupling to the electron. The present results pave the way to the use of electron microscope spectroscopies to explore the near-field characteristics of nonreciprocal systems with high spatial resolution.
    Language English
    Publishing date 2021-10-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.127.157404
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  5. Article ; Online: Chemical identification through two-dimensional electron energy-loss spectroscopy.

    Yu, Renwen / García de Abajo, F Javier

    Science advances

    2020  Volume 6, Issue 28, Page(s) eabb4713

    Abstract: We explore a disruptive approach to nanoscale sensing by performing electron energy loss spectroscopy through the use of low-energy ballistic electrons that propagate on a two-dimensional semiconductor. In analogy to free-space electron microscopy, we ... ...

    Abstract We explore a disruptive approach to nanoscale sensing by performing electron energy loss spectroscopy through the use of low-energy ballistic electrons that propagate on a two-dimensional semiconductor. In analogy to free-space electron microscopy, we show that the presence of analyte molecules in the vicinity of the semiconductor produces substantial energy losses in the electrons, which can be resolved by energy-selective electron injection and detection through actively controlled potential gates. The infrared excitation spectra of the molecules are thereby gathered in this electronic device, enabling the identification of chemical species with high sensitivity. Our realistic theoretical calculations demonstrate the superiority of this technique for molecular sensing, capable of performing spectral identification at the zeptomol level within a microscopic all-electrical device.
    Language English
    Publishing date 2020-07-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.abb4713
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  6. Article ; Online: Development of Potent MALT1 Inhibitors Featuring a Novel "2-Thioxo-2,3-dihydrothiazolo[4,5-

    Liang, Xuewu / Yu, Haolan / Liang, Renwen / Feng, Zhuanghui / Saidahmatov, Abdusaid / Sun, Chenxia / Ren, Hairu / Wei, Xiaohui / Zhao, Jiayan / Yang, Chenghua / Liu, Hong

    Journal of medicinal chemistry

    2024  Volume 67, Issue 4, Page(s) 2884–2906

    Abstract: Mucosa-associated lymphoid tissue lymphoma translocation protein 1 (MALT1) has emerged as a novel and promising therapeutic target for the treatment of lymphomas and autoimmune diseases. Herein, we reported a new class of MALT1 inhibitors featuring a ... ...

    Abstract Mucosa-associated lymphoid tissue lymphoma translocation protein 1 (MALT1) has emerged as a novel and promising therapeutic target for the treatment of lymphomas and autoimmune diseases. Herein, we reported a new class of MALT1 inhibitors featuring a novel "2-thioxo-2,3-dihydrothiazolo[4,5-
    MeSH term(s) Humans ; Caspases/metabolism ; Phosphatidylinositol 3-Kinases/metabolism ; Lymphoma, Large B-Cell, Diffuse/drug therapy ; Cell Line, Tumor ; Mucosa-Associated Lymphoid Tissue Lymphoma Translocation 1 Protein ; Signal Transduction ; NF-kappa B/metabolism
    Chemical Substances Caspases (EC 3.4.22.-) ; Phosphatidylinositol 3-Kinases (EC 2.7.1.-) ; Mucosa-Associated Lymphoid Tissue Lymphoma Translocation 1 Protein (EC 3.4.22.-) ; NF-kappa B ; MALT1 protein, human (EC 3.4.22.-)
    Language English
    Publishing date 2024-02-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 218133-2
    ISSN 1520-4804 ; 0022-2623
    ISSN (online) 1520-4804
    ISSN 0022-2623
    DOI 10.1021/acs.jmedchem.3c02031
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  7. Article: Design and performance study of a rotating piezoelectric wind energy harvesting device with wind turbine structure

    He, Lipeng / Han, Yuhang / Liu, Renwen / Hu, Renhui / Yu, Gang / Cheng, Guangming

    Energy. 2022 Oct. 01, v. 256

    2022  

    Abstract: This paper proposes a rotating piezoelectric ambient wind energy harvesting device with wind turbine structure (R-PWEH), which mainly consists of wind turbine, support structure, excitation module, and power generation unit. This paper mainly ... ...

    Abstract This paper proposes a rotating piezoelectric ambient wind energy harvesting device with wind turbine structure (R-PWEH), which mainly consists of wind turbine, support structure, excitation module, and power generation unit. This paper mainly investigates the effect of wind turbines with a different number of fan blades and units with different shapes of power generation on the performance output of R-PWEH. A series of experimental studies were conducted on the R-PWEH in the wind speed range of 0–20 m/s. In the experimental study at a wind speed of 16 m/s, the maximum voltage output of the R-PWEH was 114.24 V when the wind turbine with 11 fan blades and the rectangular cantilever beam power generation unit was installed. The optimal external load at this point is 8 kΩ and the maximum output power is 36.89 mW. The fastest charging rate for the capacitor at this parameter allows for easy powering of multiple light-emitting diodes for illumination. It has good prospects for development in practical applications, such as the ability to power micro and small sensors.
    Keywords capacitors ; electric potential difference ; lighting ; power generation ; wind power ; wind speed ; wind turbines
    Language English
    Dates of publication 2022-1001
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2019804-8
    ISSN 0360-5442 ; 0360-5442
    ISSN (online) 0360-5442
    ISSN 0360-5442
    DOI 10.1016/j.energy.2022.124675
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Progress in studying the impact of hyperlipidemia and statins on rotator cuff injury and repair.

    Qian, Yinhua / Huang, Haoqiang / Wan, Renwen / Zhou, Yu / Feng, Xinting / Xu, Feng / Luo, Zhiwen / Wang, Qing

    Frontiers in public health

    2023  Volume 11, Page(s) 1279118

    Abstract: This review delves into the intersection of two prevalent conditions, hyperlipidemia and rotator cuff injuries, both of which bear substantial healthcare burdens. Our investigation begins with an exploration of rotator cuff injuries, common ... ...

    Abstract This review delves into the intersection of two prevalent conditions, hyperlipidemia and rotator cuff injuries, both of which bear substantial healthcare burdens. Our investigation begins with an exploration of rotator cuff injuries, common musculoskeletal disorders that severely impair shoulder functionality and quality of life. These injuries are notably pervasive among sports enthusiasts and the older adult, with an incidence rate estimated at 5-10% in the general population. Despite their widespread occurrence and the diverse, multifactorial etiological factors, effective treatment strategies remain elusive. We then examine hyperlipidemia, a metabolic disorder affecting approximately 40% of the global adult population. Characterized by elevated levels of cholesterol and triglycerides, hyperlipidemia can precipitate severe cardiovascular complications and presents a significant socioeconomic burden. Although current management strategies encompass lifestyle modifications and pharmacological interventions, the condition remains a formidable health challenge. Central to this review is the exploration of a potential association between hyperlipidemia and rotator cuff injuries. We aim to synthesize the current understanding of hyperlipidemia's role in the pathophysiology of rotator cuff injuries, thereby offering fresh insights into their common etiological underpinnings, potential therapeutic targets, and drugs, such as Statins. The influence of other lipid-lowering therapeutics on tendon health is also considered, and further research into the molecular pathways and potential therapeutic benefits of these drugs is required. This pursuit aligns with broader efforts to enhance patient outcomes, minimize healthcare burdens, and contribute to the global understanding of these prevalent conditions.
    MeSH term(s) Humans ; Aged ; Rotator Cuff Injuries/drug therapy ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/therapeutic use ; Hyperlipidemias/drug therapy ; Rotator Cuff ; Quality of Life
    Chemical Substances Hydroxymethylglutaryl-CoA Reductase Inhibitors
    Language English
    Publishing date 2023-10-27
    Publishing country Switzerland
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2711781-9
    ISSN 2296-2565 ; 2296-2565
    ISSN (online) 2296-2565
    ISSN 2296-2565
    DOI 10.3389/fpubh.2023.1279118
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  9. Article ; Online: Erratum: Photothermal Engineering of Graphene Plasmons [Phys. Rev. Lett. 121, 057404 (2018)].

    Yu, Renwen / Guo, Qiushi / Xia, Fengnian / García de Abajo, F Javier

    Physical review letters

    2020  Volume 125, Issue 25, Page(s) 259901

    Abstract: This corrects the article DOI: 10.1103/PhysRevLett.121.057404. ...

    Abstract This corrects the article DOI: 10.1103/PhysRevLett.121.057404.
    Language English
    Publishing date 2020-09-23
    Publishing country United States
    Document type Published Erratum
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.125.259901
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  10. Article ; Online: Gate-tunable negative refraction of mid-infrared polaritons.

    Hu, Hai / Chen, Na / Teng, Hanchao / Yu, Renwen / Xue, Mengfei / Chen, Ke / Xiao, Yuchuan / Qu, Yunpeng / Hu, Debo / Chen, Jianing / Sun, Zhipei / Li, Peining / de Abajo, F Javier García / Dai, Qing

    Science (New York, N.Y.)

    2023  Volume 379, Issue 6632, Page(s) 558–561

    Abstract: Negative refraction provides a platform to manipulate mid-infrared and terahertz radiation for molecular sensing and thermal emission applications. However, its implementation based on metamaterials and plasmonic media presents challenges with optical ... ...

    Abstract Negative refraction provides a platform to manipulate mid-infrared and terahertz radiation for molecular sensing and thermal emission applications. However, its implementation based on metamaterials and plasmonic media presents challenges with optical losses, limited spatial confinement, and lack of active tunability in this spectral range. We demonstrate gate-tunable negative refraction at mid-infrared frequencies using hybrid topological polaritons in van der Waals heterostructures. Specifically, we visualize wide-angle negatively refracted polaritons in α-MoO
    Language English
    Publishing date 2023-02-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.adf1251
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