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Non-Planar 3D Nano-Aperture Design with Strong Near-Field Enhancement
Jiying Xu,Jia Wang,Qian Tian 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.47 No.1
In this paper a non-planar 3D nano-aperture structure, a two-step-shaped aperture with a combination of a rectangular aperture and a triangular aperture in each step, is proposed. By a 3D finite-difference time-domain (FDTD) method, numerical simulations with a recording medium absent and present have been carried out with plane wave and Gaussian wave. The calculation results reveal that no matter what wave is incident, the novel aperture shows strong near-field enhancement. The peak intensity is enhanced at least 280 times and the power throughput is 1.8994 with plane wave and even approaches 3 with Gaussian wave. With a recording medium, when the full width at half maximum (FWHM) of the light spot is 135 nm × 115 nm, the power delivered to the medium reaches 12.39 % of the incident power. This kind of non-planar 3D nano-aperture can be directly used as an exit aperture of a very-small-aperture laser or as an unattached shield, to produce a sub-wavelength light source with high transmission.
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A 300J IGBT PULSED LASER POWER SUPPLY USING ZERO-CURRENT SWITCHING HALF-BRIDGE DC-DC INVERTER
Shi Jiying,Jia Guixi,Shen Yuzhen,Xin Qirong,Wang Qingyue 전력전자학회 1995 ICPE(ISPE)논문집 Vol.1995 No.10
A 300J IGBT pulsed laser power supply designed for 4X65F high voltage pulsed xenon lamp is described. The power supply delivers an output-voltage range from 0V to 1400V to the pulsed load with maximum peak energy of 300J and maximum peak current of 600A. The efficiency range of the power supply is measured from 85.2% to 92.2%. Detailed analysis and design of the power supply, along with the experimental results are presented.
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Pei Feng,Jiye Jia,Shuping Peng,Yang Shuai,Hao Pan,Xinna Bai,CIJUN SHUAI 한국생체재료학회 2022 생체재료학회지 Vol.26 No.1
Background: The reinforcement effect of fiber-reinforced polymer composites is usually limited because of the poor interfacial interaction between fiber and polymer, though fiber reinforcement is regarded as an effective method to enhance the mechanical properties of polymer. Methods: In this study, nano-SiO2 particles grafted by 3-Glycidoxypropyltrimethoxysilane (KH560) were introduced onto the surface of 3-Aminopropyltriethoxysilane (KH550) modified carbon fiber (CF) by a self-assembly strategy to improve the interfacial bonding between CF and biopolymer poly (lactic acid) (PLLA). Results: The results indicated that PLLA chains preferred to anchor at the surface of nano-SiO2 particles and then formed high order crystalline structures. Subsequently, PLLA spherulites could epitaxially grow on the surface of functionalized CF, forming a transcrystalline structure at the CF/PLLA interface. Meanwhile, the nano-SiO2 particles were fixed in the transcrystalline structure, which induced a stronger mechanical locking effect between CF and PLLA matrix. The results of tensile experiments indicated that the PLLA/CF-SiO2 scaffold with a ratio of CF to SiO2 of 9:3 possessed the optimal strength and modulus of 10.11 MPa and 1.18 GPa, respectively. In addition, in vitro tests including cell adhesion and fluorescence indicated that the scaffold had no toxicity and could provide a suitable microenvironment for the growth and proliferation of cell. Conclusion: In short, the PLLA/CF-SiO2 scaffold with good mechanical properties and cytocompatibility had great potential in the application of bone tissue engineering.
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