Search Results - Genquan Han
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Investigation of Enhanced Transmission and Beaming Effect Through an InSb Subwavelength Grating With a Slit at the Terahertz Range
Published 2020-01-01Get full textIn this paper, we demonstrate the feasibility of realizing the extraordinary optical transmission (EOT) and the collimated beaming effect through InSb grating, which has a subwavelength slit surrounded by a finite array of grooves at both sides of the surface. Firstly, we investigate the transmissio...
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Light–Matter Interaction in Black Phosphorus Coupled to a Si Photonic Crystal at Near Infrared Band
Published 2019-01-01Get full textIn this paper, we demonstrate the light interaction mechanism of black phosphorus (BP) in two different structures: the photonic crystal waveguide (PCW) and photonic crystal mirror (PCM). The optical characteristics are simulated by the numerical method finite difference time domain. Specifically, t...
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Nonlinear Bound States in the Continuum of Etchless Lithium Niobate Metasurfaces
Published 2020-01-01Get full textOptical bound states in the continuum (BICs) have recently been studied in a wide range of material systems, where light is perfectly confined in the continuous spectrum of radiating modes. In this paper, we reported periodic nonlinear metasurfaces on the etchless LiNbO<sub>3</sub> platf...
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A Weighted Low-Rank and Sparse Constraint-Based Multichannel Radar Forward-Looking Imaging Method
Published 2025-01-01Get full textRadar super-resolution imaging methods with joint low-rank and sparse constraints have garnered increasing attention. However, in complex imaging scenarios, the low-rank property of the signal matrix is often not prominent, which limits the performance of directly applying low-rank constraints in su...
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Analytical Calculation of Influence of Ferroelectric Properties on Electrical Characteristics Negative Capacitance Germanium FETs
Published 2018-01-01Get full textNegative capacitance (NC) germanium (Ge) p-channel field effect transistors with different ferroelectric parameters are investigated by the analytical model. The channel surface potential amplification induced by the NC effect, which determines the subthreshold swing (SS) and the drain current <i...
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Absorption Enhancement for Black Phosphorus Active Layer Based on Plasmonic Nanocavity
Published 2018-01-01Get full textIn this letter, we propose a strategy to enhance absorption in the black phosphorus absorber based on a nanocavity structure. By introducing a porous silver layer, an enhanced broadband light absorption can be obtained in the spectral range of 520–820 nm. The optical characteristics of th...
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Theoretical Investigation of Tensile-Strained GeSn/SiGeSn Multiple Quantum Well Laser Wrapped in Si 3N4 Liner Stressor
Published 2018-01-01Get full textA tensile-strained GeSn/SiGeSn multiple quantum well (MQW) laser wrapped in Si<sub>3</sub>N<sub>4</sub> liner stressor is designed and characterized theoretically. A biaxial tensile strain is introduced into the GeSn/SiGeSn MQW laser by the Si<sub>3</sub>N<sub&...
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Buffer-Free GeSn with High Relaxation Degree Grown on Si(001) Substrate for Photodetection
Published 2018-01-01Get full textIn this paper, buffer-free germanium–tin (GeSn) films on Si(001) grown by molecular beam epitaxy are characterized. GeSn layers show high thermal stability under complementary metal–oxide–semiconductor processing conditions. The experimental results demonstrate that...
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Rainbow Trapping in Highly Doped Silicon Graded Grating Strip at the Terahertz Range
Published 2018-01-01Get full textIn this paper, we propose surface plasma polaritons (SPPs) propagating along the structure of grating grooves based on highly doped silicon, which exhibits better performance of exciting SPPs than metal at low frequency (e.g., microwaves, mid infrared, and terahertz). The dispersive properties of th...
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Comparison Study of β-Ga2O3 Photodetectors Grown on Sapphire at Different Oxygen Pressures
Published 2017-01-01Get full textIn this paper, β-Ga<sub>2</sub>O<sub>3</sub> ultraviolet photodetectors were grown on sapphire utilizing the laser molecular beam epitaxy tool. The impact of oxygen pressure <italic>P</italic><sub>O2</sub> in growth chamber on the crystal qu...
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Ultrathin Corrugated Metallic Strips for Ultrawideband Surface Wave Trapping at Terahertz Frequencies
Published 2017-01-01Get full textThe dispersion properties of the ultrathin spoof slow-wave plasmonic waveguide based on different ultrathin metal strip grooves have been simulated using the finite element method. The dispersion characteristics of the four different surface plasmon polariton (SPP) waves are thoroughly analyzed by t...
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High-Performance Low-Bandgap Polymer Solar Cells With Optical Microcavity Employing Ultrathin Ag Film Electrode
Published 2016-01-01Get full textIn this paper, the performance of indium-tin-oxide (ITO) free microcavity polymer solar cells based on the thieno[3,4-b]thiophene/benzodithiophene:[6,6]-phenyl C<sub>71</sub>-butyric acid methyl ester (PTB7:PC<sub>71</sub> BM) blend and transparent Ag electrode is...
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A van der Waals Synaptic Transistor Based on Ferroelectric Hf0.5Zr0.5O2 and 2D Tungsten Disulfide
Published 2020-06-01Get full textAbstract Neuromorphic computing on the hardware level is promising for performing ever‐increasing data‐centric tasks owing to its superiority to conventional von Neumann architecture in terms of energy efficiency and learning ability. One key aspect to its implementation is the development of artifi...
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Strong room-temperature ferromagnetism and magnetocaloric effect in anisotropic two-dimensional layered chromium indium telluride
Published 2025-01-01Get full textTwo-dimensional (2D) layered ferromagnets offer exciting opportunities for studying magnetic phenomena and developing advanced spintronic devices. In this study, we experimentally present a 2D chromium indium telluride (Cr _6 In _2 Te _12 , CIT) that exhibits robust room-temperature ferromagnetism a...
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