Open AccessObserving the transient buildup of a superscatterer in the time domain
Author(s) -
Chao Qian,
Huaping Wang,
Rujiang Li,
Bin Zheng,
Zhiwei Xu,
Hongsheng Chen
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.004967
Subject(s) - transient (computer programming) , time domain , optics , magnification , scattering , physics , domain (mathematical analysis) , function (biology) , finite difference time domain method , computer science , mathematical analysis , mathematics , computer vision , operating system , evolutionary biology , biology
Superscatterer is an intriguing electromagnetic device, which can enhance the wave scattering of a given object with an arbitrary magnification factor in principle. However, observing the transient buildup of a superscatterer in numerical time domain still has not been investigated yet. In this paper, by using the dispersive finite difference time domain method, the transient response of a dispersive superscatterer created with monotonic optical transformation function is studied. We find that the time delay grows dramatically when the magnification factor increases. In addition, we notice an interesting phenomenon that, placing a scattering body with more complicated structure leads to longer time delays. These findings are very useful to reveal the physics behind the superscatterer.