3 papers
physics.optics2026
Full-Wave Harmonic Balance Framework for Dispersive Time-Varying Photonic Structures
Mohammad R. Tavakol, Wenshan Cai
Time-varying photonic structures redistribute electromagnetic energy among Floquet harmonics, enabling frequency conversion, nonreciprocity, parametric gain, and dynamic wavefront…
physics.optics2025
Nonreciprocal Negative Refraction Enabled by Photonic Time Crystals
Mohammad R. Tavakol, Wenshan Cai
We propose and theoretically demonstrate nonreciprocal negative refraction enabled by time-varying photonic structures. By engineering temporal modulations at the interfaces of hyp…
physics.optics2018
Electromagnetic Field Tapering in the High-Roughness Substrates Coated by a Thin Film of Manganese: A Lithography-Free Approach to Ultra-Broadband, Wide-Angle, UV to FIR Perfect Absorption
Majid Aalizadeh, Mohammad Reza Tavakol, Amin Khavasi +2
Metallic layers are known to be used for the suppression of wave transmission when their thickness is sufficiently higher than the skin depth of metal. If in addition to blocking t…