In this paper, we have studied a new film structure to improve the characteristics of optical filtering. We have changed the thickness and material of the metal oxide and ferrite material. And the structure of the film shows different absorbing properties, which can be utilized in different scenarios as we need. We chose this kind of thin film structure for simulation modeling with the finite-difference time-domain (FDTD) method, and analyzed of this nanostructure under three-dimensional conditions. The results demonstrate that in the three-dimensional structure, not only the material properties, but also the thickness. which will have a far-reaching influence on the absorption characteristics. Besides, Surface ion effect can affect the performance of the film. Therefore, this structure in the field of nanostructures has broad application prospects, such as microwave devices multichannel communication and so on.
Frequency Selective Surface (FSS), which is a kind of emerging artificial metamaterial, is widely used in research and engineering areas and attracting more and more attention. In this paper, we apply the finite difference time domain method including the surface impedance absorbing boundary condition (SIABC) to simulate different FSS. Both the magnetic field (H-) and electric field (E-) collocated SIABC are implemented. The H-collocated SIABC could be directly combined with the periodic boundary condition without extra formula derivation while the updating equations for the E-collocated SIABC combined with PBC are derived. The reflection error and stability of the proposed method are analyzed, and different FSSs including a dipole FSS and a Jarusalem cross are simulated under normal incidence. The co-polarized reflection and transmission coefficients of the FSSs are obtained. Good agreement is reached with the FDTD method including convolutional perfectly matched layer, while up to 41.88% of time and 40.98% of memory is saved.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.