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Papers by Reza Aghbolaghi

Research paper thumbnail of Carbon Quantum Dot Embedding Silica–Molecularly Imprinted Polymer Coated Optical Fiber as Ratiometric Biosensors Toward Dopamine Detection

IEEE Sensors Journal, Dec 31, 2023

Research paper thumbnail of Optimization of cut-off frequency in high harmonic generation in noble gas

Applied Physics B, Dec 13, 2023

Research paper thumbnail of Pulse reflection from a weakly absorbing and dispersing dielectric slab

Optik - International Journal for Light and Electron Optics, 2015

Abstract Group delay for a reflected and a transmitted pulse from a weakly absorbing and dispersi... more Abstract Group delay for a reflected and a transmitted pulse from a weakly absorbing and dispersing dielectric slab was theoretically investigated, and it was shown that the effects of absorption and dispersion are different in resonant and off resonant slabs. Also we obtained the condition in which superluminal and subluminal pulses are propagated through resonant dielectric slab, simultaneously.

Research paper thumbnail of Self-consistency equations in axicon-based thin-disk laser resonators

Research paper thumbnail of Probability of ionization of the noble gas atoms and ions for high harmonic generation

Modern Physics Letters B

Radiation produced in high-order harmonic generation (HHG) process can be utilized to generate at... more Radiation produced in high-order harmonic generation (HHG) process can be utilized to generate attosecond pulses. According to the semi-classical theory of HHG, the maximum emitted photon energy is [Formula: see text]. The ionization potential ([Formula: see text] and ponderomotive energy ([Formula: see text], play important roles in the generated photon energy; therefore, choosing the material and field for HHG is important. Here, investigating the probability of ionization of material in laser and plasmonic field for HHG is important. The ionization probability of noble gases atoms and ions was investigated. Using Ammosov–Delone–Krainov (ADK) model formulas, the parameters for ions and atoms were determined. The results show that helium is the most suitable noble gas atom for HHG in both fields. After ionizing the atoms, the ionization potential increases significantly, and the ionization probability also decreases. Then, ions are better than their corresponding atoms for HHG. Amo...

Research paper thumbnail of Perovskite-Based Lossy-Mode Resonance Sensor in Visible Light Spectrum: Comparison and Optimization of Optical Enhancements

SSRN Electronic Journal, 2022

Research paper thumbnail of CCDC 935544: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Research paper thumbnail of Preparation of silver nanostructures from a new benzopyrazine silver(I) nitrate coordination polymer

Inorganic Chemistry Communications, 2014

ABSTRACT

Research paper thumbnail of High power Bessel-like laser beam by thin disk geometry

International Journal of Physical Sciences, 2013

We have numerically shown that a high power Bessel-Gauss beam can be generated by a solid state t... more We have numerically shown that a high power Bessel-Gauss beam can be generated by a solid state thin disk laser using an axicon-based resonator. Ytterbium ions doped in the Yttrium Aluminum Garnet (YAG) crystal was utilized in this configuration as an active medium. We obtained the output power, the intensity as well as phase profiles on the output coupler and the active medium. Key words: Axicon based resonator, Thin disk laser, Bessel like beam.

Research paper thumbnail of Irish neurological association

Irish Journal of Medical Science, 1987

Research paper thumbnail of Generation of ideal Bessel beam by thin disk laser configuration

Journal of the Optical Society of America B, 2022

Research paper thumbnail of Pumping Of Kn Crystal With Cr:LiSAF Lasers

In this paper we described and simulated generation of blue pulse (460nm) by nonlinear KN(KNbO3) ... more In this paper we described and simulated generation of blue pulse (460nm) by nonlinear KN(KNbO3) crystal,that pumped by femtosecond diode pumped Cr:LiSAF lasers. Our simulation show that, by focusing of laser oscillator output pulses with characteristics such as 860nm wavelength, 200fs,330MHz repetition rate 14o Pico joule ( PJ) energy in KN crystal with 3mm length at 22 0C by 15 mm lens in less than 20 micrometer spot size with single pass produce pulses with 42pJ energy,425fs, 30 % optical efficiency and 1 % total efficiency.

Research paper thumbnail of Output power of thin-disk laser with ring-shaped pumping distributions

Optics and Photonics Society of Iran, 2017

In this paper, the output power of a thin-disk laser has been investigated with a ring-shaped pum... more In this paper, the output power of a thin-disk laser has been investigated with a ring-shaped pumping distribution. It is useful to produce non-diffracting Bessel-Gaussian beams and radially polarized beams. The output power has been estimated by solving the rate equations of a quasi-three -levels Yb doped material.

Research paper thumbnail of High Harmonic Generation from H_2 〖He〗^(2+) Molecules in Plasmonic Field

Optics and Photonics Society of Iran, 2019

Research paper thumbnail of Xuv Output Coupler Through a One-Dimensional Photonic Crystal

Research paper thumbnail of Effect of Axicon Apex Curvature on Resonator Behavior in Thin Disk Lasers

In this article the effect of the axicon apex curvature on the transvers profile of the dominant ... more In this article the effect of the axicon apex curvature on the transvers profile of the dominant mode has been studied in the axicon based thin disk laser configuration. To extracting of the dominant mode, the scalar Fox-Li method has been used along with numerically solving the Huygens Fresnel diffraction integral. The results show that the hyperboloid parameter and the angle of the curved apex axicon just has effects on the dominant mode of the resonator and the thickness of axicon has not effect on its profile.

Research paper thumbnail of Deformation effect of thin disk on the output beam

In this paper the behavior of nondiffracting of eigen mode is studied in an axicon-based resonato... more In this paper the behavior of nondiffracting of eigen mode is studied in an axicon-based resonator when the thin disk is deformed. The Huygens-Fresnel diffraction integration is solved numerically and finally the prominent mode of resonator is extracted by employing of well-known Fox and Li method. The active medium is Ytterbium doped material and its diameter is several hundred microns. Results show that the profile of eigen mode is distorted by deformation of the active medium (concave or convex). Also, the losses of resonator are studied respect to varying of radius curvature of disk.

Research paper thumbnail of Calculating Magnetic Permeability Response of a Conducting Square Ring Structure

In the present work, we investigate the tunability of the magnetic response of a new structure. A... more In the present work, we investigate the tunability of the magnetic response of a new structure. A lattice of periodically arranged close-packed square conducting rings has been studied for this purpose. Here, instead of enhancing the magnetic activity via resonance, like in splitring resonators, we concentrate on the analysis of the interactions between these rings. The core idea is to design an array with negligible capacity and to focus on inductive interactions between its building cells. In other words, in this structure, the enhancement of the microscopic process has been attained by the interaction of its building block, i.e. a collective feature has been considered. It is our goal to obtain a sizable magnetic response with this new approach. Our ultimate goal is to demonstrate that the relative magnetic permeability of this architecture could be less than one or even less than zero.

Research paper thumbnail of Thin Disk’s Radius of Curvature Effects on Diffraction Loss in Axicon- Based Resonators

Optics and Photonics Society of Iran, 2019

In this paper, The amplitude profile at the output coupler mirror and at the active medium, the s... more In this paper, The amplitude profile at the output coupler mirror and at the active medium, the spot size and the loss diffraction have been investigated in an axicon-based thin disk resonator by considering some radius of curvature for the thin disk and the output coupler. The results show the diffraction loss, the spot size and the amplitude profile can be controlled by selecting of the appropriate radius of curvature for the thin disk and causing improvement of output beam.

Research paper thumbnail of Design of A Femtosecond Blue Pulse Generation System By Pumping Of Kn Crystal With Cr:LiSAF Lasers

International Journal of Fundamental Physical Sciences

In this paper we described and simulated generation of blue pulse (460nm) by nonlinear KN(KNbO3) ... more In this paper we described and simulated generation of blue pulse (460nm) by nonlinear KN(KNbO3) crystal ,that pumped by femtosecond diode pumped Cr:LiSAF lasers. Our simulation show that, by focusing of laser oscillator output pulses with characteristics such as 860nm wavelength, 200fs,330MHz repetition rate 14o Pico joule(PJ) energy in KN crystal with 3mm length at 22 0C by 15 mm lens in less than 20 micrometer spot size with single pass produce pulses with 42pJ energy ,425fs , 30% optical efficiency and 1% total efficiency.

Research paper thumbnail of Carbon Quantum Dot Embedding Silica–Molecularly Imprinted Polymer Coated Optical Fiber as Ratiometric Biosensors Toward Dopamine Detection

IEEE Sensors Journal, Dec 31, 2023

Research paper thumbnail of Optimization of cut-off frequency in high harmonic generation in noble gas

Applied Physics B, Dec 13, 2023

Research paper thumbnail of Pulse reflection from a weakly absorbing and dispersing dielectric slab

Optik - International Journal for Light and Electron Optics, 2015

Abstract Group delay for a reflected and a transmitted pulse from a weakly absorbing and dispersi... more Abstract Group delay for a reflected and a transmitted pulse from a weakly absorbing and dispersing dielectric slab was theoretically investigated, and it was shown that the effects of absorption and dispersion are different in resonant and off resonant slabs. Also we obtained the condition in which superluminal and subluminal pulses are propagated through resonant dielectric slab, simultaneously.

Research paper thumbnail of Self-consistency equations in axicon-based thin-disk laser resonators

Research paper thumbnail of Probability of ionization of the noble gas atoms and ions for high harmonic generation

Modern Physics Letters B

Radiation produced in high-order harmonic generation (HHG) process can be utilized to generate at... more Radiation produced in high-order harmonic generation (HHG) process can be utilized to generate attosecond pulses. According to the semi-classical theory of HHG, the maximum emitted photon energy is [Formula: see text]. The ionization potential ([Formula: see text] and ponderomotive energy ([Formula: see text], play important roles in the generated photon energy; therefore, choosing the material and field for HHG is important. Here, investigating the probability of ionization of material in laser and plasmonic field for HHG is important. The ionization probability of noble gases atoms and ions was investigated. Using Ammosov–Delone–Krainov (ADK) model formulas, the parameters for ions and atoms were determined. The results show that helium is the most suitable noble gas atom for HHG in both fields. After ionizing the atoms, the ionization potential increases significantly, and the ionization probability also decreases. Then, ions are better than their corresponding atoms for HHG. Amo...

Research paper thumbnail of Perovskite-Based Lossy-Mode Resonance Sensor in Visible Light Spectrum: Comparison and Optimization of Optical Enhancements

SSRN Electronic Journal, 2022

Research paper thumbnail of CCDC 935544: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Research paper thumbnail of Preparation of silver nanostructures from a new benzopyrazine silver(I) nitrate coordination polymer

Inorganic Chemistry Communications, 2014

ABSTRACT

Research paper thumbnail of High power Bessel-like laser beam by thin disk geometry

International Journal of Physical Sciences, 2013

We have numerically shown that a high power Bessel-Gauss beam can be generated by a solid state t... more We have numerically shown that a high power Bessel-Gauss beam can be generated by a solid state thin disk laser using an axicon-based resonator. Ytterbium ions doped in the Yttrium Aluminum Garnet (YAG) crystal was utilized in this configuration as an active medium. We obtained the output power, the intensity as well as phase profiles on the output coupler and the active medium. Key words: Axicon based resonator, Thin disk laser, Bessel like beam.

Research paper thumbnail of Irish neurological association

Irish Journal of Medical Science, 1987

Research paper thumbnail of Generation of ideal Bessel beam by thin disk laser configuration

Journal of the Optical Society of America B, 2022

Research paper thumbnail of Pumping Of Kn Crystal With Cr:LiSAF Lasers

In this paper we described and simulated generation of blue pulse (460nm) by nonlinear KN(KNbO3) ... more In this paper we described and simulated generation of blue pulse (460nm) by nonlinear KN(KNbO3) crystal,that pumped by femtosecond diode pumped Cr:LiSAF lasers. Our simulation show that, by focusing of laser oscillator output pulses with characteristics such as 860nm wavelength, 200fs,330MHz repetition rate 14o Pico joule ( PJ) energy in KN crystal with 3mm length at 22 0C by 15 mm lens in less than 20 micrometer spot size with single pass produce pulses with 42pJ energy,425fs, 30 % optical efficiency and 1 % total efficiency.

Research paper thumbnail of Output power of thin-disk laser with ring-shaped pumping distributions

Optics and Photonics Society of Iran, 2017

In this paper, the output power of a thin-disk laser has been investigated with a ring-shaped pum... more In this paper, the output power of a thin-disk laser has been investigated with a ring-shaped pumping distribution. It is useful to produce non-diffracting Bessel-Gaussian beams and radially polarized beams. The output power has been estimated by solving the rate equations of a quasi-three -levels Yb doped material.

Research paper thumbnail of High Harmonic Generation from H_2 〖He〗^(2+) Molecules in Plasmonic Field

Optics and Photonics Society of Iran, 2019

Research paper thumbnail of Xuv Output Coupler Through a One-Dimensional Photonic Crystal

Research paper thumbnail of Effect of Axicon Apex Curvature on Resonator Behavior in Thin Disk Lasers

In this article the effect of the axicon apex curvature on the transvers profile of the dominant ... more In this article the effect of the axicon apex curvature on the transvers profile of the dominant mode has been studied in the axicon based thin disk laser configuration. To extracting of the dominant mode, the scalar Fox-Li method has been used along with numerically solving the Huygens Fresnel diffraction integral. The results show that the hyperboloid parameter and the angle of the curved apex axicon just has effects on the dominant mode of the resonator and the thickness of axicon has not effect on its profile.

Research paper thumbnail of Deformation effect of thin disk on the output beam

In this paper the behavior of nondiffracting of eigen mode is studied in an axicon-based resonato... more In this paper the behavior of nondiffracting of eigen mode is studied in an axicon-based resonator when the thin disk is deformed. The Huygens-Fresnel diffraction integration is solved numerically and finally the prominent mode of resonator is extracted by employing of well-known Fox and Li method. The active medium is Ytterbium doped material and its diameter is several hundred microns. Results show that the profile of eigen mode is distorted by deformation of the active medium (concave or convex). Also, the losses of resonator are studied respect to varying of radius curvature of disk.

Research paper thumbnail of Calculating Magnetic Permeability Response of a Conducting Square Ring Structure

In the present work, we investigate the tunability of the magnetic response of a new structure. A... more In the present work, we investigate the tunability of the magnetic response of a new structure. A lattice of periodically arranged close-packed square conducting rings has been studied for this purpose. Here, instead of enhancing the magnetic activity via resonance, like in splitring resonators, we concentrate on the analysis of the interactions between these rings. The core idea is to design an array with negligible capacity and to focus on inductive interactions between its building cells. In other words, in this structure, the enhancement of the microscopic process has been attained by the interaction of its building block, i.e. a collective feature has been considered. It is our goal to obtain a sizable magnetic response with this new approach. Our ultimate goal is to demonstrate that the relative magnetic permeability of this architecture could be less than one or even less than zero.

Research paper thumbnail of Thin Disk’s Radius of Curvature Effects on Diffraction Loss in Axicon- Based Resonators

Optics and Photonics Society of Iran, 2019

In this paper, The amplitude profile at the output coupler mirror and at the active medium, the s... more In this paper, The amplitude profile at the output coupler mirror and at the active medium, the spot size and the loss diffraction have been investigated in an axicon-based thin disk resonator by considering some radius of curvature for the thin disk and the output coupler. The results show the diffraction loss, the spot size and the amplitude profile can be controlled by selecting of the appropriate radius of curvature for the thin disk and causing improvement of output beam.

Research paper thumbnail of Design of A Femtosecond Blue Pulse Generation System By Pumping Of Kn Crystal With Cr:LiSAF Lasers

International Journal of Fundamental Physical Sciences

In this paper we described and simulated generation of blue pulse (460nm) by nonlinear KN(KNbO3) ... more In this paper we described and simulated generation of blue pulse (460nm) by nonlinear KN(KNbO3) crystal ,that pumped by femtosecond diode pumped Cr:LiSAF lasers. Our simulation show that, by focusing of laser oscillator output pulses with characteristics such as 860nm wavelength, 200fs,330MHz repetition rate 14o Pico joule(PJ) energy in KN crystal with 3mm length at 22 0C by 15 mm lens in less than 20 micrometer spot size with single pass produce pulses with 42pJ energy ,425fs , 30% optical efficiency and 1% total efficiency.