Ehsan Faghihifar

most citedFast estimation of propagation constants in crossed gratings

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physics.optics2026

Bounds on Propagation Constants in Dielectric Gratings

Ehsan Faghihifar

We establish analytical bounds on the normalized longitudinal propagation constants $β = k_{z} / k_{0}$ of modes in lossless dielectric diffraction gratings. If $ε_{m a x}$ denotes the maxi…

physics.optics2021★ 2 cited

Fast estimation of propagation constants in crossed gratings

Ehsan Faghihifar, Mahmood Akbari, Seyed Amir Hossein Nekuee

Fourier-based modal methods are among the most effective numerical tools for the accurate analysis of crossed gratings. However, leading to computationally expensive eigenvalue equ…