Mr. Jie Luo Profile

Jie Luo

at National Univ of Defense Technology

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Publications (3)

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Proceedings Article | 9 December 2021 Paper

Low loss ultra-smooth gold films for two-dimensional material plasmonic devices

Jie Luo, Chunchao Wen, Zhihong Zhu, Jianfa Zhang

Proceedings Volume 12030, 1203003 (2021) https://doi.org/10.1117/12.2617527

KEYWORDS: Metals, Plasmonics, Gold, Refractive index, Absorption, Thin films, Surface roughness

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The search for low loss plasmonic metals have been a long-standing research topic in the nanophotonics community. This issue becomes even more important for two-dimensional plasmonic devices as the light-matter interaction with twodimensional materials will be significantly suppresses by metal absorption due to their atomic thickness. In this paper, we have numerically demonstrated that light amplification may be achieved in a plasmonic resonant metasurface using a lower loss metal film. Using a modified template peeling method, we found that the gold films obtained by template peeling have a better three-dimensional morphology than those obtained by vapour deposition, while the gold films obtained by template peeling have a lower relative dielectric constant imaginary part in the 400-800 nm band as measured by ellipsometric polarisation. We expect that further improvement of the fabrication method for the low loss ultra-smooth plasmonic films will lead to the demonstration of high performance two-dimensional materials plamsonic devices such as lasers or spasers.

Proceedings Article | 24 November 2021 Paper

Joule heating of centimeter scale graphene films for thermal and infrared applications

Jin Yang, Jie Luo, Zhihong Zhu, Jianfa Zhang

Proceedings Volume 12062, 120620U (2021) https://doi.org/10.1117/12.2607106

KEYWORDS: Graphene, Thermography, Temperature metrology, Infrared imaging

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As a two-dimensional material, graphene shows excellent properties in many aspects. Among them, it exhibits extremely high carrier mobility, excellent thermal conductivity, and high temperature stability due to its unique lattice structure, so it is superior than previously used conventional materials in the field of thermal applications. This paper introduces the study of graphene heating film of centimeter scale. We transfer large areas of graphene films to four different substrates to study the characteristics of heating temperature, thermal response time and heating uniformity of graphene films. Experimental results show that graphene with a heating area of 0.7cm × 1cm can be rapidly raised from room temperature to above 100℃ at a DC voltage of 25V. According to the experimental results, graphene performs well in both heating temperature and heating rate compared to traditional heating materials, which provides good prospects for the use of graphene in fields such as deicing, defogging, medical physiotherapy and others.

Proceedings Article | 24 November 2021 Paper

Inverse nanotapers and lensed fibers for highly efficient coupling

Ning Liu, Jipeng Xu, Jie Luo

Proceedings Volume 12066, 1206609 (2021) https://doi.org/10.1117/12.2602115

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Because it is not possible to integrate the light source on the silicon-based photonic chips, it is necessary to study the efficient coupling method to coupling the light from the fiber into the chip. In order to ensure the high coupling efficiency, the edge coupling method is adopted in this paper. The simulation is carried out in the COMSOL software. The incident light is set as a Gaussian beam with a waist diameter of 2.5 μm and a wavelength of 1550 nm to simulate the light emitted from the lensed fiber. The incident region of the waveguide adopts an inverse-nanotaper design, that is along the direction of light propagation, the width and height of the waveguide in the taper region gradually increase and keep constants in the bus waveguide region. In this paper, the specific size of the designed inverse-nanotaper coupler is given, and the coupling efficiency of the edge couplers under different conditions is analyzed, which lays a certain foundation for on-chip integration of related devices.

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