Masoud Jabbari

Islamic Azad University, Marvdasht

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Ghahraman Solookinejad

Islamic Azad University, Marvdasht

E. Ahmadi Sangachin

University of Tehran

Mohammad Kazem Moravvej‐Farshi

Tarbiat Modares University

Mehdi Nafar

Islamic Azad University, Marvdasht

Taher Niknam

Shiraz University of Technology

Rahim Ghayour

Islamic Azad University of Shiraz

Abbas Zarifkar

Shiraz University

Seyyed Hossein Asadpour

Institute for Research in Fundamental Sciences

Mohsen Ghaffari‐Miab

Tarbiat Modares University

Mehdi Dehghan

Islamic Azad University, Masjed Soleyman

Cooperative Institutions

Islamic Azad University, Marvdasht

Islamic Azad University, Tehran

Sharif University of Technology

Shiraz University

Islamic Azad University, Science and Research Branch

University of Tehran

Shiraz University of Technology

Tarbiat Modares University

Shahid Beheshti University

Malek Ashtar University of Technology

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Synthesis of Graphene Oxide Functionalized with Amio Methyl Phosphonic Acid (AMPA) and its Structural Characterization

Journal of Optoelectronical Nanostructures (2021)

Farzad Vaziri Alamdarlo Ghahraman Solookinejad Fazel Zahakifar Masoud Rezvani Jalal Masoud Jabbari

In this paper, graphene oxide (GO) and its functionalization with “Amio Methyl Phosphonic Acid” (AMPA) are synthesized using modified Hummers method. Crystal structure of the compounds is investigated by X-ray diffraction pattern (XRD). Fourier transform infrared spectroscopy (FTIR) clearly shows that the AMPA agent does really enter into the GO. Transmission electron microscope (TEM) images of the compounds reveal that they are in the form of nano-sheets. High resolution TEM (HRTEM) microscope is also used to observe and study the nanoscopic morphology of the structures. In addition, the samples are element-analyzed by energy dispersive X-ray spectroscope (EDS), and X-ray photoelectron spectroscopy (XPS) to get more information. Finally, the functionalization mechanism of GO with AMPA is studied and the mechanisms of “nucleophilic displacement” as well as “condensation reaction” are suggested andare experimentally confirmed. Due to the favorable properties of the synthesized material AMPA-GO, its use was suggested for water treatment and removal of heavy metals such as lead and strontium.

Surface Modification

10.30495/jopn.2021.28124.1223

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Citations (1)

XPM Response of a Chirped DFB-SOA All-Optical Flip-Flop Injected With an Assist Light at Transparency

Journal of Lightwave Technology (2009)

Masoud Jabbari Mohammad Kazem Moravvej‐Farshi Rahim Ghayour Abbas Zarifkar

In this paper, based on the coupled-mode and carrier rate equations, we have derived a dynamic model for a linearly chirped distributed feedback semiconductor optical amplifier (DFB-SOA) all-optical flip-flop (DFB-SOA-FF) and analyzed it numerically. We have investigated the effects of assist light and cross-phase modulation (XPM) on the dynamic response and rise and fall times of the DFB-SOA-FF, for the first time. We have also shown that injection of an assist light, within the transparency spectrum, into a DFB-SOA with a linearly chirped grating can improve the device speed limitation, significantly. Values of the ON and OFF switching times for such an optical flip-flop, in an optimized condition, are found to be 190 and 195 ps, respectively. These show reductions of more than three times in the ON and seven times in the OFF switching times with respect to those of the uniform grating DFB-SOA-FF. Finite-difference time-domain method is used for numerical simulations.

10.1109/jlt.2008.2005791

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Citations (9)

Ultra-compact Spatial Terahertz Switch Based on Graphene Plasmonic-Coupled Waveguide

Plasmonics (2019)

Mehdi Dehghan Mohammad Kazem Moravvej‐Farshi Mohsen Ghaffari‐Miab Masoud Jabbari Ghafar Darvish

Port (circuit theory)

Waveguide

10.1007/s11468-019-00921-0

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Citations (17)

Phase control of Goos-Hänchen shifts in a fixed structure with carbon-nanotube quantum dot nanostructure

The European Physical Journal Plus (2017)

Masoud Jabbari

Spin–orbit interaction

10.1140/epjp/i2017-11510-1

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Citations (7)

Incoherent control of optical bistability and multistability in a hybrid system: Metallic nanoparticle-quantum dot nanostructure

Journal of Applied Physics (2018)

Ghahraman Solookinejad Masoud Jabbari Mehdi Nafar Ebrahim Ahmadi Seyyed Hossein Asadpour

We discuss the optical bistability and multistability properties of incident light on a unidirectional ring cavity consisting of a hybrid semiconductor quantum dot-metal nanoparticle system driven by coupling and incoherent pumping fields. We consider the quantum dot system as a three-level V-type configuration which is placed near the metallic nanoparticle. We realize that the threshold of optical bistability and optical multistability can be controlled by tuning the center-to-center distance between quantum dots and metallic nanoparticles. Moreover, the effect of incoherent pumping field on optical bistability and optical multistability has been discussed for different distances between quantum dots and metallic nanoparticles.

Multistability

Optical Bistability

Bistability

10.1063/1.5038874

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Citations (52)

The Effects of Strained Multiple Quantum Well on the Chirped DFB-SOA All Optical Flip-Flop

International journal of nanoscience and nanotechnology (2011)

Masoud Jabbari Mohammad Kazem Moravvej‐Farshi Rahim Ghayour Abbas Zarifkar

In this paper, based on the coupled-mode and carrier rate equations, a dynamic model and numerical analysis of a multi quantum well (MQW) chirped distributed feedback semiconductor optical amplifier (DFB-SOA) all-optical flip-flop is precisely derived. We have analyzed the effects of strains of QW and MQW and cross phase modulation (XPM) on the dynamic response, and rise and fall times of the DFB-SOA all optical flip flop. We have shown that strained MQW active region under an optimized condition into a DFB-SOA with chirped grating can improve the switching ON speed limitation in the abovementioned device, significantly while the fall time is increased. The values of the rise times for such an all optical flip-flop, are obtained in an optimized condition, areas tr=255ps.

Flip-flop

Modulation (music)

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Theoretical Investigation of Light Transmission in a Slab Cavity via Kerr Nonlinearity of Carbon Nanotube Quantum Dot Nanostructure

International Journal of Theoretical Physics (2017)

Ghahraman Solookinejad Masoud Jabbari E. Ahmadi Sangachin Seyyed Hossein Asadpour

Electromagnetically Induced Transparency

Slab

10.1007/s10773-017-3536-y

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Citations (11)

Investigating the Properties of an Optical Waveguide Based on Photonic Crystal with Point Defect and Lattice Constant Perturbation

Journal of Optoelectronical Nanostructures (2016)

Khojasteh Zarei Ghahraman Solookinejad Masoud Jabbari

In this paper, a photonic crystal waveguide with point defects and lattice constant perturbations of +5%, -5% are being investigated. Firstly waveguide structures with constant and specific parameters are being studied and photonic band gap diagrams for TE/TM modes are depicted; then pulse propagation in the frequencies available in the band gap are shown. After that, effects of parameters like refractive indicesand radius of the rods on the band gap diagram of TE/TMmodes are evaluated. It has beenshown that, by increasing the refractive indices and radius of the rods, band gap diagrams would be shifted to lower frequency amounts.

Band diagram

Lattice constant

Propagation constant

Rod

Waveguide

Yablonovite

Constant (computer programming)

Lattice (music)

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Citations (2)

Study of kinetic, thermodynamic, and isotherm of Sr adsorption from aqueous solutions on graphene oxide (GO) and (aminomethyl)phosphonic acid–graphene oxide (AMPA–GO)