110 citations · 570 across the 13 of their papers we have counts for
13 papers
Indirect band gap semiconductors for thin-film photovoltaics: High-throughput calculation of phonon-assisted absorption
Jiban Kangsabanik, Mark Kamper Svendsen, Alireza Taghizadeh +2
Discovery of high-performance materials remains one of the most active areas in photovoltaics (PV) research. Indirect band gap materials form the largest part of the semiconductor…
Two-dimensional Materials with Giant Optical Nonlinearities Near the Theoretical Upper Limit
Alireza Taghizadeh, Kristian S. Thygesen, Thomas G. Pedersen
Nonlinear optical (NLO) phenomena such as harmonic generation, Kerr, and Pockels effects are of great technological importance for lasers, frequency converters, modulators, switche…
A library of ab initio Raman spectra for automated identification of 2D materials
A. Taghizadeh, U. Leffers, T. G. Pedersen +1
Raman spectroscopy is frequently used to identify composition, structure and layer thickness of 2D materials. Here, we describe an efficient first-principles workflow for calculati…
Plasmons in ultra-thin gold slabs with quantum spill-out: Fourier modal method, perturbative approach, and analytical model
Alireza Taghizadeh, Thomas G. Pedersen
We numerically study the effect of the quantum spill-out (QSO) on the plasmon mode indices of an ultra-thin metallic slab, using the Fourier modal method (FMM). To improve the conv…
Nonlinear optical selection rules of excitons in monolayer transition metal dichalcogenides
Alireza Taghizadeh, T. G. Pedersen
We propose an analytical approach for calculating the linear and nonlinear optical (NLO) responses of monolayer transition metal dichalcogenides (TMDs) including excitonic effects.…
Nonlinear excitonic spin Hall effect in monolayer transition metal dichalcogenides
Alireza Taghizadeh, T. G. Pedersen
We propose and analyze a mechanism for inducing spin Hall currents in ordinary (1H phase) monolayer transition metal dichalcogenides (TMDs) due to the nonlinear process of optical…
Gauge invariance of excitonic linear and nonlinear optical response
Alireza Taghizadeh, T. G. Pedersen
We study the equivalence of four different approaches to calculate the excitonic linear and nonlinear optical response of multiband semiconductors. These four methods derive from t…
Nonlinear optical response of doped mono- and bilayer graphene: length gauge tight-binding model
F. Hipolito, Alireza Taghizadeh, T. G. Pedersen
We compute the nonlinear optical response of doped mono- and bilayer graphene using the full dispersion based on tight-binding models. The response is derived with the density matr…
Linear and nonlinear optical response of crystals using length and velocity gauges: Effect of basis truncation
Alireza Taghizadeh, F. Hipolito, T. G. Pedersen
We study the effects of a truncated band structure on the linear and nonlinear optical response of crystals using four methods. These are constructed by (i) choosing either length…
Quasi Bound States in the Continuum with Few Unit Cells of Photonic Crystal Slab
Alireza Taghizadeh, Il-Sug Chung
Bound states in the continuum (BICs) in photonic crystal slabs represent the resonances with an infinite quality(Q)-factor, occurring above the light line for an infinitely periodi…
Numerical Investigation of Vertical Cavity Lasers with Subwavelength Gratings Using the Fourier Modal Method
Alireza Taghizadeh, Jesper Mørk, Il-Sug Chung
We show the strength of the Fourier modal method (FMM) for numerically investigating the optical properties of vertical cavities including subwavelength gratings. Three different t…
Vertical-Cavity In-plane Heterostructures: Physics and Applications
Alireza Taghizadeh, Jesper Mørk, Il-Sug Chung
We show that the in-plane heterostructures realized in vertical cavities with high contrast grating(HCG) reflector enables exotic configurations of heterostructure and photonic wel…
Hybrid vertical-cavity laser with lateral emission into a silicon waveguide
Gyeong Cheol Park, Weiqi Xue, Alireza Taghizadeh +4
We experimentally demonstrate an optically-pumped III-V/Si vertical-cavity laser with lateral emission into a silicon waveguide. This on-chip hybrid laser comprises a distributed B…