Hamid Pashaei Adl
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View article: Tunable Room‐Temperature Polaritons in the Very Strong Coupling Regime in Quasi‐2D Ruddlesden–Popper Perovskites
Tunable Room‐Temperature Polaritons in the Very Strong Coupling Regime in Quasi‐2D Ruddlesden–Popper Perovskites Open
Layered perovskites are an emergent class of materials, which feature extraordinarily large light–matter coupling, driven by excitons with binding energies significantly beyond the thermal energy at room‐temperature. In this work, widely t…
View article: Room-temperature polariton condensate in a two-dimensional hybrid perovskite
Room-temperature polariton condensate in a two-dimensional hybrid perovskite Open
Layered 2D halide perovskites are chemically synthesized realizations of quantum well stacks with giant exciton oscillator strengths, tunable emission spectra and very large exciton binding energies. While these features render 2D halide p…
View article: Origin of discrete donor–acceptor pair transitions in 2D Ruddlesden–Popper perovskites
Origin of discrete donor–acceptor pair transitions in 2D Ruddlesden–Popper perovskites Open
Two-dimensional (2D) van der Waals nanomaterials have attracted considerable attention for potential use in photonic and light–matter applications at the nanoscale. Thanks to their excitonic properties, 2D perovskites are also promising ac…
View article: Tailoring Single‐Mode Random Lasing of Tin Halide Perovskites Integrated in a Vertical Cavity
Tailoring Single‐Mode Random Lasing of Tin Halide Perovskites Integrated in a Vertical Cavity Open
The development of random lasing (RL) with predictable and controlled properties is an important step to make these cheap optical sources stable and reliable. However, the design of tailored RL characteristics (emission energy, threshold, …
View article: Superradiance Emission and Its Thermal Decoherence in Lead Halide Perovskites Superlattices
Superradiance Emission and Its Thermal Decoherence in Lead Halide Perovskites Superlattices Open
Self‐assembled nanocrystals (NCs) into superlattices (SLs) are alternative materials to polycrystalline films and single crystals, which can behave very differently from their constituents, especially when they interact coherently with eac…
View article: Van der Waals Heteroepitaxy of GaSe and InSe, Quantum Wells, and Superlattices
Van der Waals Heteroepitaxy of GaSe and InSe, Quantum Wells, and Superlattices Open
Bandgap engineering and quantum confinement in semiconductor heterostructures provide the means to fine‐tune material response to electromagnetic fields and light in a wide range of the spectrum. Nonetheless, forming semiconductor heterost…
View article: Enhanced Spontaneous Emission of CsPbI3 Perovskite Nanocrystals Using a Hyperbolic Metamaterial Modified by Dielectric Nanoantenna
Enhanced Spontaneous Emission of CsPbI3 Perovskite Nanocrystals Using a Hyperbolic Metamaterial Modified by Dielectric Nanoantenna Open
In this work, we demonstrate, theoretically and experimentally, a hybrid dielectric-plasmonic multifunctional structure able to provide full control of the emission properties of CsPbI3 perovskite nanocrystals (PNCs). The device consists o…
View article: Van Der Waals Heteroepitaxy of GaSe and InSe, Quantum Wells and Superlattices
Van Der Waals Heteroepitaxy of GaSe and InSe, Quantum Wells and Superlattices Open
Bandgap engineering and quantum confinement in semiconductor heterostructures provide the means to fine-tune material response to electromagnetic fields and light in a wide range of the spectrum. Nonetheless, forming semiconductor heterost…
View article: Revealing giant exciton fine-structure splitting in 2D perovskites using van der Waals passivation
Revealing giant exciton fine-structure splitting in 2D perovskites using van der Waals passivation Open
The study of two-dimensional (2D) van der Waals materials has been an active field of research in the development of new optoelectronics and photonic applications over the last decade. Organic-inorganic layered perovskites are currently so…
View article: Donor-acceptor discrete optical emission in 2D perovskites
Donor-acceptor discrete optical emission in 2D perovskites Open
Two-dimensional (2D) van der Waals nanomaterials have attracted considerable attention for potential use in photonic and optoelectronic applications in the nanoscale, due to their outstanding electrical and optical properties, differing fr…
View article: Tailoring Optical Bistability In Nonlinear Photonic Crystals Based on Metallic Nanoparticles And Graphene
Tailoring Optical Bistability In Nonlinear Photonic Crystals Based on Metallic Nanoparticles And Graphene Open
In this work, we revisit the optical response of a one-dimensional photonic crystal consisting of graphene monolayers and a plasmonic nanocomposite as a defect layer in the structure. By taking advantage of the modified transfer matrix app…
View article: Extrinsic Effects on the Optical Properties of Surface Color Defects Generated in Hexagonal Boron Nitride Nanosheets
Extrinsic Effects on the Optical Properties of Surface Color Defects Generated in Hexagonal Boron Nitride Nanosheets Open
Hexagonal boron nitride (hBN) is a wide-band gap van der Waals material able to host light-emitting centers behaving as single photon sources. Here, we report the generation of color defects in hBN nanosheets dispersed on different kinds o…
View article: Homogeneous and inhomogeneous broadening in single perovskite nanocrystals investigated by micro-photoluminescence
Homogeneous and inhomogeneous broadening in single perovskite nanocrystals investigated by micro-photoluminescence Open
Metal halides with perovskite crystalline structure have given rise to efficient optoelectronic and photonic devices. In the present work, we have studied the light emission properties of single CsPbBr3 and CsPbI3 semiconductor perovskite …
View article: Purcell Enhancement and Wavelength Shift of Emitted Light by CsPbI<sub>3</sub> Perovskite Nanocrystals Coupled to Hyperbolic Metamaterials
Purcell Enhancement and Wavelength Shift of Emitted Light by CsPbI<sub>3</sub> Perovskite Nanocrystals Coupled to Hyperbolic Metamaterials Open
Manipulation of the exciton emission rate in nanocrystals of lead halide perovskites (LHPs) was demonstrated by means of coupling of excitons with a hyperbolic metamaterial (HMM) consisting of alternating thin metal (Ag) and dielectric (Li…
View article: Ligand-Length Modification in CsPbBr3 Perovskite Nanocrystals and Bilayers with PbS Quantum Dots for Improved Photodetection Performance
Ligand-Length Modification in CsPbBr3 Perovskite Nanocrystals and Bilayers with PbS Quantum Dots for Improved Photodetection Performance Open
Nanocrystals surface chemistry engineering offers a direct approach to tune charge carrier dynamics in nanocrystals-based photodetectors. For this purpose, we have investigated the effects of altering the surface chemistry of thin films of…
View article: Interpretation of the photoluminescence decay kinetics in metal halide perovskite nanocrystals and thin polycrystalline films
Interpretation of the photoluminescence decay kinetics in metal halide perovskite nanocrystals and thin polycrystalline films Open
In this paper we present critical analysis of different points of view on interpretation of the photoluminescence (PL) decay kinetics in lead halide perovskites prepared in the form of well passivated nanocrystals (PNCs) or thin polycrysta…
View article: Scattering of electromagnetic waves by a graphene-coated thin cylinder of left-handed metamaterial
Scattering of electromagnetic waves by a graphene-coated thin cylinder of left-handed metamaterial Open
View article: Tunable invisibility cloaking by using isolated graphene-coated nanowires and dimers
Tunable invisibility cloaking by using isolated graphene-coated nanowires and dimers Open
We investigate, both theoretically and numerically, a graphene-coated nano-cylinder illuminated by a plane electromagnetic wave in the far-infrared range of frequencies. We have derived an analytical formula that enables fast evaluation of…
View article: Design of surface plasmon resonance biosensor with one dimensional photonic crystal for detection of cancer
Design of surface plasmon resonance biosensor with one dimensional photonic crystal for detection of cancer Open
In recent years, development of highly sensitive biosensors is the main purpose of researchers to diagnose and prevent diseases. Accordingly, in this paper, surface plasmon resonance (SPR) biosensor has been designed based on one dimension…