The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform

Jing-song Hong - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of single-layer metamaterial absorber with Reflection Theory
    Journal of Applied Physics, 2015
    Co-Authors: Han Xiong, Ming-chun Tang, Jing-song Hong
    Abstract:

    A Reflection Theory is employed to analyze a single-layered metamaterial absorber. With the necessary conditions for zero Reflection, the permittivity and permeability as functions of absorptivity were obtained, which are suitable for analyzing the absorption properties of single-layered metamaterial absorber at both normal and oblique incidence cases. With the obtained expressions, it not only can explain why the absorption peaks monotonously decrease with increasing of the incident angles but also can explore the relationship between the absorptivity and spacer thickness of the dielectric slab. A Jerusalem cross metamaterial absorber was simulated and verified the validity of this proposed Reflection Theory. The main contribution of our work is that it can explain the physical mechanism of the various absorption peaks by using the analytical formula and highlights its potential guidance for designing and analyzing metamaterial absorbers in the future.

Han Xiong - One of the best experts on this subject based on the ideXlab platform.

  • Varied absorption peaks of dual-band metamaterial absorber analysis by using Reflection Theory
    Applied Physics A, 2016
    Co-Authors: Han Xiong, Ming-chun Tang, Shiyong Chen, Dan-ping Liu, Hao Zeng
    Abstract:

    Cross-resonator metamaterial absorbers (MMA) have been widely investigated from microwave to optical frequencies. However, only part of the factors influencing the absorption properties were analyzed in previous works at the same time. In order to completely understand how the spacer thickness, dielectric parameter and incidence angle affect the absorption properties of the dual-band MMA, two sets of simulation were performed. It was found that with increasing incident angles, the low-frequency absorption peak showed a blue shift, while the high-frequency absorption peaks showed a red shift. However, with the increase in spacer thickness, both of the absorption peaks showed a red shift. By using the Reflection Theory expressions, the physical mechanism of the cross-resonator MMA was well explained. This method provides an effective way to analyze multi-band absorber in technology.

  • Analysis of single-layer metamaterial absorber with Reflection Theory
    Journal of Applied Physics, 2015
    Co-Authors: Han Xiong, Ming-chun Tang, Jing-song Hong
    Abstract:

    A Reflection Theory is employed to analyze a single-layered metamaterial absorber. With the necessary conditions for zero Reflection, the permittivity and permeability as functions of absorptivity were obtained, which are suitable for analyzing the absorption properties of single-layered metamaterial absorber at both normal and oblique incidence cases. With the obtained expressions, it not only can explain why the absorption peaks monotonously decrease with increasing of the incident angles but also can explore the relationship between the absorptivity and spacer thickness of the dielectric slab. A Jerusalem cross metamaterial absorber was simulated and verified the validity of this proposed Reflection Theory. The main contribution of our work is that it can explain the physical mechanism of the various absorption peaks by using the analytical formula and highlights its potential guidance for designing and analyzing metamaterial absorbers in the future.

Susan C. Hagness - One of the best experts on this subject based on the ideXlab platform.

  • Amplified total internal Reflection: Theory, analysis, and demonstration of existence via FDTD
    Optics express, 2008
    Co-Authors: K. J. Willis, John B. Schneider, Susan C. Hagness
    Abstract:

    The explanation of wave behavior upon total internal Reflection from a gainy medium has defied consensus for 40 years. We examine this question using both the finite-difference time-domain (FDTD) method and theoretical analyses. FDTD simulations of a localized wave impinging on a gainy half space are based directly on Maxwell’s equations and make no underlying assumptions. They reveal that amplification occurs upon total internal Reflection from a gainy medium; conversely, amplification does not occur for incidence below the critical angle. Excellent agreement is obtained between the FDTD results and an analytical formulation that employs a new branch cut in the complex “propagation-constant” plane.

Ming-chun Tang - One of the best experts on this subject based on the ideXlab platform.

  • Varied absorption peaks of dual-band metamaterial absorber analysis by using Reflection Theory
    Applied Physics A, 2016
    Co-Authors: Han Xiong, Ming-chun Tang, Shiyong Chen, Dan-ping Liu, Hao Zeng
    Abstract:

    Cross-resonator metamaterial absorbers (MMA) have been widely investigated from microwave to optical frequencies. However, only part of the factors influencing the absorption properties were analyzed in previous works at the same time. In order to completely understand how the spacer thickness, dielectric parameter and incidence angle affect the absorption properties of the dual-band MMA, two sets of simulation were performed. It was found that with increasing incident angles, the low-frequency absorption peak showed a blue shift, while the high-frequency absorption peaks showed a red shift. However, with the increase in spacer thickness, both of the absorption peaks showed a red shift. By using the Reflection Theory expressions, the physical mechanism of the cross-resonator MMA was well explained. This method provides an effective way to analyze multi-band absorber in technology.

  • Analysis of single-layer metamaterial absorber with Reflection Theory
    Journal of Applied Physics, 2015
    Co-Authors: Han Xiong, Ming-chun Tang, Jing-song Hong
    Abstract:

    A Reflection Theory is employed to analyze a single-layered metamaterial absorber. With the necessary conditions for zero Reflection, the permittivity and permeability as functions of absorptivity were obtained, which are suitable for analyzing the absorption properties of single-layered metamaterial absorber at both normal and oblique incidence cases. With the obtained expressions, it not only can explain why the absorption peaks monotonously decrease with increasing of the incident angles but also can explore the relationship between the absorptivity and spacer thickness of the dielectric slab. A Jerusalem cross metamaterial absorber was simulated and verified the validity of this proposed Reflection Theory. The main contribution of our work is that it can explain the physical mechanism of the various absorption peaks by using the analytical formula and highlights its potential guidance for designing and analyzing metamaterial absorbers in the future.

Nguyen Thanh Tung - One of the best experts on this subject based on the ideXlab platform.