Time domain modeling of bi-anisotropic media and phase change materials with generalized dispersion (Conference Presentation)

Ludmila J. Prokopeva; Vladimir Liberman; Jeffrey Chou; Christopher Roberts; Mikhail Shalaginov; Yifei Zhang; Juejun Hu; Zhaxylyk Kudyshev; Alexander Kildishev

doi:10.1117/12.2529097

9 September 2019 Time domain modeling of bi-anisotropic media and phase change materials with generalized dispersion (Conference Presentation)

Ludmila J. Prokopeva, Vladimir Liberman, Jeffrey Chou, Christopher Roberts, Mikhail Shalaginov, Yifei Zhang, Juejun Hu, Zhaxylyk Kudyshev, Alexander Kildishev

Author Affiliations +

Proceedings Volume 11080, Metamaterials, Metadevices, and Metasystems 2019; 1108006 (2019) https://doi.org/10.1117/12.2529097
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

We have already successfully employed the Generalized Dispersion Material (GDM) technique to include optical dispersion of different materials in the multiphysics time domain methods implementing the GDM model with various Auxiliary Differential Equation (ADE) and Recursive Convolution (RC) schemes. So far, we have demonstrated that the approach works efficiently to model the optical dispersion of metals, and to characterize the multivariate tunable dispersion of graphene. In this paper, we apply the GDM model to two emerging fields in the time-domain computational photonics. In the first part, we further extend the GDM model to the Bi-Anisotropic (BA) case, where a full BA material tensor comes from homogenization procedure in the frequency domain. Conventional BA homogenization is a powerful multiscale technique for rapid prototyping and optimization of metasurfaces. With a new extension, the BA-GDM model characterizes artificial dispersion obtained from the mathematical equivalence of physical effects and enables the multiscale modeling of metasurfaces in the time domain. Part 2 deals with new use of the GDM model in temperature-dependent time-domain simulations of phase change materials (PCMs). Optical PCMs, such as GST/GSST, are of critical utility in applications including, e.g., programmable metasurfaces, and nonvolatile memory. Typically, dispersions of amorphous and crystalline phases of PCMs are fitted separately in the frequency domain with a combination of the Tauc-Lorentz and Gauss terms, while Bruggeman’s mixing rule describes the transition states. Significantly advancing the-state-of-the-art, our GDM characterization describes dependency on temperature and crystallization levels explicitly and enables full wave modeling of PCMs in the time domain.

Conference Presentation

Citation Download Citation

Ludmila J. Prokopeva, Vladimir Liberman, Jeffrey Chou, Christopher Roberts, Mikhail Shalaginov, Yifei Zhang, Juejun Hu, Zhaxylyk Kudyshev, and Alexander Kildishev "Time domain modeling of bi-anisotropic media and phase change materials with generalized dispersion (Conference Presentation)", Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 1108006 (9 September 2019); https://doi.org/10.1117/12.2529097

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

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.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available