Article
Optics
Neetik Mukherjee, Chandra N. Patra, Amlan K. Roy
Summary: The behavior of H-like ions embedded in astrophysical plasmas is investigated under various plasma conditions, with mathematical models simplified to demonstrate the interactions between them.
Article
Physics, Multidisciplinary
Hossein Akbarian Shourkaei, Mohammad Mahdavi
Summary: The dielectric response function method calculates the equation of state and thermodynamic properties of plasma by defining the effective potential. This paper introduces the use of the Hulthen potential as the primary potential in describing hot dense plasma using the dielectric response function method. A comparison is made between the Hulthen and Debye potentials to determine the screening parameter of the Hulthen potential. The thermodynamic properties of hot dense plasma are then calculated analytically using the effective interaction potential obtained.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Physics, Fluids & Plasmas
Dong-Hui Wang, Shu-Xing Wang, Zhi-Wei Nie, Li-Han Wang, Yuan-Chen Xu, Xiao-Jiao Du, Lin-Fan Zhu
Summary: This study investigates the optical absorption properties of trifluoromethane as a fluorine source in reactive etching plasma and provides a benchmark for further theoretical calculations.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Shaoxiang Liang, Linfeng Zhang, Hui Deng
Summary: Optical manufacturing is crucial in various fields, and the PAMM process offers a nonsubtractive approach to achieve atomic-level surface roughness control. By utilizing inductively coupled plasma as the tool, PAMM demonstrates its feasibility as an alternative method for atomic-level surface manufacturing.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Rulin Li, Yaguo Li, Hui Deng
Summary: This study introduces a nonsubtractive surface polishing technique called plasma-induced atom migration manufacturing (PAMM), which utilizes energy transmitted by inductively coupled plasma (ICP) to form a molten layer on the fused silica surface, achieving a rearrangement of surface atoms or clusters driven by surface tension. Unlike the conventional subtractive smoothing processes, PAMM removes no material and offers high efficiency and low cost, making it a promising technique for producing large optical components with excellent optical performance and long operation life.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
M. Mahdavi, H. Akbarian
Summary: The interactions of hot dense plasma particles are calculated using the dielectric response method. The relation between Hulthen potential and Debye potential is explored, and a relationship between screening and shielding parameters is established.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Physics, Mathematical
Dai-Nam Le, Van-Hoang Le
Summary: The nine-dimensional McIntosh-Cisneros-Zwanziger-Kepler problem, which describes the nonrelativistic motion of a charged particle around a dyon in (9 + 1) spacetime, has been solved exactly using the variable-separation method in spherical, parabolic, and prolate spheroidal coordinate systems. This study establishes a relationship between variable separation and the algebraic structure of SO(10) symmetry. Additionally, it demonstrates that each coordinate system corresponds to a set of eigenfunctions of a nonuplet of algebraically independent integrals of motion, and allows for the calculation of important integrals using algebraic methods.
JOURNAL OF MATHEMATICAL PHYSICS
(2022)
Article
Optics
Yu Ying He, Li Guang Jiao, Aihua Liu, Yong Zhi Zhang, Yew Kam Ho
Summary: In this study, the multipole polarizabilities for hydrogen-like atoms with Hulthen potential were calculated using the generalized pseudospectral method, producing precise results for energy states, transition oscillator strengths, and dipole polarizabilities. Additionally, quadrupole, octupole, and hexadecapole polarizabilities for both ground and excited states were reported for the first time, along with an investigation into the combined effect of Hulthen potential and an impenetrable sphere on polarizabilities. Comparison among different potential models revealed complex variations in energy corrections despite good agreement in ground state energies with the comparison theorem.
EUROPEAN PHYSICAL JOURNAL D
(2021)
Editorial Material
Chemistry, Physical
Yaghoob Naimi
Summary: Yakar et al. (2018) investigated the optical properties of spherical quantum dots and found mistakes in previous optical calculations, introducing the correct selection rules.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Jing Li, Yanan Zhou, Weijing Tang, Jian Zheng, Xiaoping Gao, Ning Wang, Xiao Chen, Min Wei, Xin Xiao, Wei Chu
Summary: The study demonstrates the tunability of Pt single atoms coordination through a cold-plasma technique and predicts a strong correlation between Pt-N coordination concentration and adsorption free energy of H* atoms for the hydrogen evolution reaction (HER). The sample with N, O co-dopant introduced by air plasma shows significantly enhanced performance, with a high turnover frequency and outstanding mass activity, suggesting that the optimized electronic structure of active carbon site plays a key role in improving the catalyst's efficiency.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Physics, Fluids & Plasmas
Dishu Dawra, Mayank Dimri, A. K. Singh, Alok K. S. Jha, Rakesh Kumar Pandey, Rinku Sharma, Man Mohan
Summary: In this study, the effect of strongly coupled plasma environment on the photoionization cross sections of H-like O7+ ion was investigated using relativistic configuration interaction technique. It was found that the plasma environment significantly influences the photoionization cross sections, with ionization thresholds shifting to lower energy regions as free electron densities increase. This research provides valuable insights for interpreting spectra in various astrophysical and laboratory plasmas.
PHYSICS OF PLASMAS
(2021)
Review
Chemistry, Multidisciplinary
William Chiappim, Benedito Botan Neto, Michaela Shiotani, Julia Karnopp, Luan Goncalves, Joao Pedro Chaves, Argemiro da Silva Sobrinho, Joaquim Pratas Leitao, Mariana Fraga, Rodrigo Pessoa
Summary: The increasing demand for miniaturized devices has led to high importance and requirements for nanofabrication technologies that are of high-quality, low temperatures, and low cost. In recent years, the development of atomic layer deposition (ALD) processes has sparked interest in their use in advanced electronic and nano/microelectromechanical systems (NEMS/MEMS) device manufacturing. Non-thermal plasma (NTP) technology has emerged as a significant technique that expands the process window of ALD and allows the fabrication of various nanomaterials at lower temperatures, enabling the coverage of thermosensitive substrates with good formability and uniformity. This review article comprehensively describes the impact of NTP on the ALD universe and its applications in device fabrication. It also presents the integration of NTP and ALD technologies to form the plasma-assisted ALD (PA-ALD) technique, which has been successfully used in nanofabrication and surface modification. The advantages and limitations of this technique are discussed, along with the introduction of atomic layer etching (ALE) technique, another development of the NTP and ALD junction that has gained attention for plasma-assisted nanofabrication.
Article
Instruments & Instrumentation
Shanmin Liu, Likun Wang, Xiaoguang Wu, Ming Guo, Xin Chen, Hongbin Zhu, Pengcheng Wang, Bin Wang, Wei Wang
Summary: This study determined the optimal atomic storage time for a hydrogen maser by adjusting the atomic beam intensity and optimizing collisional relaxation times. Under specific conditions, a high frequency stability of 0.95 x 10(-15) was achieved at 1000 seconds.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Physics, Multidisciplinary
S. Mondal, J. K. Saha, P. K. Mukherjee, B. Fricke
Summary: For the first time, quantum information theoretic measures in terms of Shannon entropy and Fisher entropy were studied for the ground, excited, and virtual states resulting from two-photon transitions of an H atom embedded in a weakly coupled plasma environment. The two-photon excitation energies and wavefunctions were calculated using fourth order time dependent perturbation theory and a variational framework. A novel method was used to determine the representation of the virtual state based on the analysis of the linear response at poles. The quantum information measures provided insights on the delocalization patterns of the states with increasing plasma strength.
Article
Chemistry, Physical
Shaoxiang Liang, Yi He, Pengbo Ding, Chunjin Wang, Liang Guo, Hui Deng
Summary: In this study, a hybrid manufacturing process based on inductively coupled plasma (ICP) was proposed to effectively reduce subsurface damage and achieve an ultra-smooth surface on fused silica optics at an atomic scale. The process combined isotropic etching polishing (IEP) and atom-migration manufacturing (AMM), where a large number of isotropic etching pits were formed, enlarged, overlapped, and merged to create a smooth surface in the plasma-IEP process. By continuously removing the subsurface damage layer, plasma-IEP could generate a less damage surface of fused silica with a material removal rate of 0.8 pm/min and reduce the roughness from 97.1 nm to 31.3 nm. Plasma-AMM further reduced the surface roughness to less than 0.15 nm without subtractive actions. Laser induced damage threshold (LIDT) tests showed that the fused silica surface after the IEP-AMM hybrid manufacturing could withstand higher laser fluence, indicating its potential for more effective applications in high-power laser systems. This study proposed and verified the hybrid plasma manufacturing process, providing a less damage manufacturing process for fused silica with an ultra-smooth surface.
SURFACES AND INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
A. Poszwa
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2018)
Article
Physics, Multidisciplinary
A. Poszwa
Article
Physics, Fluids & Plasmas
Mustafa Kemal Bahar, Asim Soylu
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2019)
Article
Physics, Multidisciplinary
F. Ungan, M. K. Bahar
Article
Chemistry, Physical
Mustafa Kemal Bahar, Fatih Ungan
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
(2020)
Article
Physics, Multidisciplinary
A. Poszwa
ACTA PHYSICA POLONICA A
(2020)
Article
Nanoscience & Nanotechnology
A. Poszwa
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2020)
Article
Chemistry, Physical
Kadir Kilic, Mustafa Kemal Bahar
Summary: This study investigates the optical properties of two-electron Gaussian quantum dots in Debye and quantum plasma environments, including total refractive index changes and total absorption coefficients, as well as the influence of external electric and magnetic fields. Numerical methods are used to obtain the system's spectra and wave functions, and the effects of various parameters on the optical response are analyzed.
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
(2021)
Article
Chemistry, Physical
Jacek Karwowski, Artur Ishkhanyan, Andrzej Poszwa
THEORETICAL CHEMISTRY ACCOUNTS
(2020)
Article
Physics, Multidisciplinary
Mustafa Kemal Bahar
Summary: This theoretical investigation focuses on the charge-currents and induced magnetizations of hydrogen atoms with noncentral interaction in a plasma environment under spherical encompassing. The study outlines the modifications in the Hartmann potential due to the plasma-embedded hydrogen atom, and the use of the more general MGECSC potential in delineating interactions in the plasma. The research provides a detailed analysis of the effects of plasma shielding, spherical confinement, and noncentral interactions on charge-currents and induced magnetizations, offering insights into their alternativeness and suggesting implications for future application studies.
ANNALEN DER PHYSIK
(2021)
Article
Multidisciplinary Sciences
A. Poszwa
Summary: This theoretical investigation focuses on the electron transport properties of rectangular graphene quantum dots (GQDs) with non-centro-symmetric out-of-plane Gaussian deformation of elliptic type. Different levels of deformation are explored to determine the optimal geometry for potential electronic applications. The electronic properties of deformed GQDs are analyzed in terms of local density of states (LDOS), band-gap opening, and equilibrium ballistic conductance. The relationship between the symmetry of the LDOS structure and the properly defined local strain field (LSF) map is studied and confirms predictions made using the concept of a pseudomagnetic field in continuum models of graphene.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
A. Poszwa
Summary: This article presents a theoretical investigation on the properties of neutral excitons confined to a mono-layer semiconductor TMDC material under the influence of an elliptically deformed gate-induced confining potential. The study shows that the anisotropy of the confinement leads to an anisotropic linear response of the system to in-plane external electric fields.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
Mustafa Kemal Bahar, Cesar Martinez-Flores
Summary: In this study, the photoionization cross sections of guest hydrogen atom in endohedral fullerene (H@Cn) under spherical confinement in the nonideal classical plasma (NICP) were reported for the first time. The wave equation was solved numerically and the energy levels, bound and continuum wave functions were analyzed. The plasma effect on photoionization resonances was examined by considering plasma temperature and density.
ANNALEN DER PHYSIK
(2023)
Article
Physics, Multidisciplinary
A. Poszwa
Summary: This theoretical investigation examines the spin and charge transport properties of a ferromagnetic metal/insulator/heavy fermion Rashba metal tunnel junction. The electron dynamics in the entire system are described by a single-particle effective Hamiltonian. The study analyzes the dependence of spin current polarization and low-bias spin-resolved conductance spectra on macroscopic parameters. The researchers observed significant spin current polarization amplification and filtering induced by Rashba spin-orbit coupling in the presence of a large difference in effective masses between the ferromagnetic metal and heavy fermion Rashba material. The spin-dependent scattering problem is solved analytically using the effective mass approximation combined with the spin density matrix formalism.
ACTA PHYSICA POLONICA A
(2023)
Article
Chemistry, Physical
M. K. Bahar, F. Ungan, H. Kaya, S. Akkoyun
Summary: This study comprehensively investigates the effects of velocity-dependent potential (VDP) on the optical properties of parabolic quantum dots. Numerical methods and density matrix formalism were used to analyze the changes in the optical properties of quantum dots with VDP, revealing significant alterations compared to cases without VDP.
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
(2021)