Yiwei Ju

Quantum-well metasurface for free-space-accessible enhanced nonlinear polarization

P.U. Fathi, Irene Occhiodori, Patrick Devaney, Amberly Ricks et autres

Abstract Nonlinear frequency conversion underpins important technologies such as telecommunications and quantum computation; however, weak nonlinearities and architectures that resist miniaturization currently limit devices’ efficiency and widespread adoption. Here we combine a band-structure-engineered GaAs/AlGaAs multi-quantum-well heterostructure with a high-quality-factor dielectric metasurface and …

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Fermiology-driven goniopolar transverse thermoelectricity in kagome metals

Haihua Hu, Yiwei Ju, Erjian Cheng, Xiaolong Feng et autres

Abstract The exotic geometry of the kagome lattice drives emergent quantum states and advances energy technologies; however, the anomalous Nernst effect (ANE)-based magnetic systems are fundamentally limited by low thermopowers (<6μ V K −1 ) and stray-field interference. Here we propose goniopolarity …

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Interface Induced Ferroelectricity in Designed CeO 2 , HfO 2 , ZrO 2 and YSZ Based Superlattice Heterostructures

Pralay Paul, Sajid Husain, Shashank Chaturvedi, Levi Brown et autres

ABSTRACT The stabilization of ferroelectricity in non‐polar oxides remain a key challenge in the design of next‐generation functional materials, as existing approaches typically rely on chemical substitution, or metastable phases. Here, we report a universal and experimentally realizable route to emergent ferroelectricity …

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Quantum-Well-Metasurface for Free-Space-Accessible Enhanced Nonlinear Polarization

P.U. Fathi, Irene Occhiodori, Patrick Devaney, Amberly Ricks et autres

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High-efficiency Pt75Au25-based spintronic terahertz emitters

Wenlu Shi, Han-Hsuan Wu, Yiwei Ju, Xiaoqing Q. Pan et autres

Spintronic terahertz emitters (STEs) generate broadband THz radiation via ultrafast spin–charge conversion in magnetic multilayers, offering spectral coverage beyond that of photoconductive antennas and nonlinear optical crystals. Here, we demonstrate STEs based on a PtxAu100−x alloy that achieve significantly higher THz output …

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Characterization of Ferroelectric Oxide-based Devices with Large Pockels Effect Using Advanced STEM

Yiwei Ju, Yifeng Huang, Moaz Waqar, Chaojie Du et autres

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Experimental study on the flow pattern and local heat transfer characteristics of water flow boiling in a vertical upward narrow rectangular channel heated by steam

Cheng Jin, Leren Tao, Shengjie Gu, Yiwei Ju et autres

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Highly stabilized and efficient thermoelectric copper selenide

Haihua Hu, Yiwei Ju, Jincheng Yu, Zechao Wang et autres

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Study of flow pattern transition criterion and heat transfer characteristics in vertical rectangular narrow channel for steam heating

Shengjie Gu, Leren Tao, Cheng Jin, Yiwei Ju et autres

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Experimental investigation on heat transfer characteristics of upward flow boiling in a vertical narrow rectangular channel

Cheng Jin, Leren Tao, Yiwei Ju, Xiefei Zhao et autres

Heat transfer experiment on water flow boiling was carried out in the upward direction under atmospheric pressure through a narrow rectangular channel heated on one-side by vapor having a gap of 2.75 mm, a width of 250 mm, and length of 1400 …

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Study of Flow Pattern Transition Criterion and Heat Transfer Characteristics in Vertical Rectangular Narrow Channel for Steam Heating

Shengjie Gu, Leren Tao, Cheng Jin, Yiwei Ju et autres

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