663 citations · 1.1k across the 8 of their papers we have counts for
8 papers
Third Harmonic THz Generation from Graphene in a Parallel-Plate Waveguide
Parvin Navaeipour, Ibraheem Al-Naib, Marc M. Dignam
Graphene as a zero-bandgap two-dimensional semiconductor with a linear electron band dispersion near the Dirac points has the potential to exhibit very interesting nonlinear optica…
Nonlinear Response of Bilayer Graphene at Terahertz Frequencies
Riley McGouran, Ibraheem Al-Naib, Marc M. Dignam
A density-matrix formalism within the length gauge is developed for the purpose of calculating the nonlinear response of intrinsic bilayer graphene at terahertz frequencies. Employ…
High field response of gated graphene at THz frequencies
Hadi Razavipour, Hassan A. Hafez, Ibraheem Al-Naib +11
We study the Fermi energy level dependence of nonlinear terahertz (THz) transmission of gated multi-layer and single-layer graphene transferred onto sapphire and quartz substrates.…
Terahertz Magnetic Modulator based on Magnetically-Clustered Nanoparticles
Mostafa Shalaby, Marco Peccianti, Yavuz Ozturk +3
Random orientation of liquid-suspended magnetic nanoparticles (Ferrofluid) gives rise to zero net magnetic orientation. An external magnetic field tends to align them into clusters…
High harmonic generation in undoped graphene: Interplay of inter- and intraband dynamics
Ibraheem Al-Naib, J. E. Sipe, Marc M. Dignam
We develop a density matrix formalism in the length gauge to calculate the nonlinear response of intrinsic monolayer graphene at terahertz frequencies. Employing a tight-binding mo…
Ultrasensitive THz sensing with high-Q Fano resonances in metasurfaces
Ranjan Singh, Wei Cao, Ibraheem Al-Naib +3
High quality factor resonances are extremely promising for designing ultra-sensitive refractive index label-free sensors since it allows intense interaction between electromagnetic…
Limitation in thin-film detection with transmission-mode terahertz time-domain spectroscopy
Withawat Withayachumnankul
In transmission-mode terahertz time-domain spectroscopy (THz-TDS), the thickness of a sample is a critical factor that determines an amount of the interaction between terahertz wav…
Asymmetric planar terahertz metamaterials
Ranjan Singh, Ibraheem A. I. Al-Naib, Martin Koch +1
We report an experimental observation of three distinct resonances in split ring resonators (SRRs) for both vertical and horizontal electric field polarizations at normal incidence…