Article
Materials Science, Multidisciplinary
Denis Sakhno, Eugene Koreshin, Pavel A. Belov
Summary: The study focuses on the dispersion properties of an easy-to-manufacture metamaterial made of connected metallic wires, which supports longitudinal waves across a wide frequency band and exhibits unprecedentedly short wavelengths in comparison to the material's period.
Article
Multidisciplinary Sciences
Hong Zhou, Zhihao Ren, Dongxiao Li, Cheng Xu, Xiaojing Mu, Chengkuo Lee
Summary: The failure of molecular identification due to the overlap of infrared vibrational fingerprints is a fundamental issue in infrared spectroscopy. This study investigates the coupling mode of localized surface plasmon and surface phonon polaritons to disentangle overlapping vibrational modes. The researchers find that the refractive index dependence of surface phonon polaritons vibrations effectively achieves high identification accuracy for strongly overlapping vibrational modes.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Li Wang, Jinlai Liu, Bin Ren, Jie Song, Yongyuan Jiang
Summary: A heterostructured graphene/hBN/graphene nanodisk array was used to create an electrically tunable absorber within and outside the Reststrahlen band of hBN, achieving tuning of resonance absorption through phonon-plasmon-polariton hybridization. The hybrid phonon mode enabled significant shifts in resonant wavelength and sensitivity to electrical control.
Article
Chemistry, Multidisciplinary
Zhanwen Xu, Qingshu Dong, Liangshun Zhang, Weihua Li
Summary: We propose a novel nanocomposite material through macromolecular engineering, which can achieve periodically bicontinuous gyroid nanostructures with high loading of functionalized nanoparticles. By tailoring the architecture of the copolymer, a hierarchical structure of a percolation network of nanoparticles within the gyroid channels is formed, leading to an enhanced dielectric permittivity of the structured nanocomposites with high loading concentration of nanoparticles.
Article
Optics
Philippe Delaye, Tao Liu, Ewan Mer, Maha Bouhadida, Sylvie Lebrun
Summary: The paper describes the experimental observation of emission of photon pairs through four-wave mixing (FWM) in a silica nanofiber, achieving high coincidence to accidental ratio (CAR) and high pair emission rate despite the presence of residual Raman spontaneous scattering. The photon pairs are observed with either a single-longitudinal-mode source or a multimode source, with the emission rate increasing by a factor of 2 with the multimode source.
Article
Engineering, Electrical & Electronic
Xiaoyuan Lu
Summary: Studying narrowband plasmonic absorbers is critical for achieving higher sensor sensitivity; graphene-based metasurfaces show a narrowband reflection spectrum with high absorption in the infrared range; this structure has potential for biosensing applications, such as monitoring neural stem cell activities during cell development.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Mengyan Luo, Xuezhu Sha, Baojiu Chen, Xizhen Zhang, Hongquan Yu, Xiangping Li, Jinsu Zhang, Sai Xu, Yongze Cao, Yichao Wang, Xin Wang, Yuhang Zhang, Duan Gao, Li Wang
Summary: In this study, the optical and spectroscopic properties of BaGd2O4:Er3+ phosphor were investigated. The host material was found to have low maximum phonon energy and excellent stability. Experimental and calculated parameters were obtained for the host material, and the quantum efficiencies for different levels were determined. The application of the material in optical temperature sensing was also explored.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Optics
Daniele Pirone, Joowon Lim, Francesco Merola, Lisa Miccio, Martina Mugnano, Vittorio Bianco, Flora Cimmino, Feliciano Visconte, Annalaura Montella, Mario Capasso, Achille Iolascon, Pasquale Memmolo, Demetri Psaltis, Pietro Ferraro
Summary: By applying computational segmentation, the three-dimensional quantitative shape of a cell nucleus can now be accurately identified without fluorescent staining. This method avoids the difficulties or impossibilities associated with cell staining and allows for the extraction of specific intracellular structures.
Article
Optics
Georgios Stoikos, Eduardo Granados
Summary: In this article, a method for accurately measuring the temperature-dependent index of refraction of diamond is proposed by using standing Stokes waves generated in a monolithic Fabry-Perot diamond Raman resonator. The model is further used to calculate the value of the average phonon frequency and the temperature-dependent thermo-optic coefficient.
Article
Optics
Xiaoyu Chen, Xin Yan, Xuenan Zhang, Fang Wang, Shuguang Li, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng
Summary: The paper introduces a highly sensitive temperature sensor based on SPM in an in-house fabricated MOF, showing a high temperature sensitivity. The experimental results are in good agreement with theoretical simulations, providing a new approach for developing low-cost, simple structure, and high-sensitivity temperature sensors.
Article
Physics, Multidisciplinary
Francesco Macheda, Paolo Barone, Francesco Mauri
Summary: This study investigates the effects of doping on the electron-phonon interaction and phonon frequencies in doped semiconductors, considering the screening due to the presence of free carriers at finite temperature. By utilizing a computational method based on maximally localized Wannier functions, the impact of screening on the Frohlich-like vertex and the long-range components of the dynamical matrix is explored, surpassing the current state-of-the-art description for undoped crystals. The approach is applied to cubic silicon carbide, where doping significantly reduces the Frohlich coupling and longitudinal-transverse phonon splitting, thereby influencing observable properties such as electronic lifetime.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
I. A. Khan, A. Rasheed, A. Farid, A. Raza, Misbah Yousaf, A. Abbas
Summary: Cadmium zinc oxide (Cd-ZnO) films were synthesized on glass substrate by chemical vapor transport technique using 200 sccm argon gas flow rate. The synthesized Cd-ZnO films were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Raman, Fourier transformed infrared spectroscopy (FTIR), and UV spectrometers. The results showed the formation of polycrystalline Cd-ZnO films confirmed by XRD patterns. Raman, FTIR, and SEM analysis confirmed the chemical bonding and substitution of Cd+ into ZnO. The optical, electrical, and dielectric parameters of the synthesized Cd-ZnO films were strongly influenced by the weights of Cd powder.
Article
Optics
Clement Deleau, Han Cheng Seat, Olivier Bernal, Frederic Surre
Summary: In this study, a high-sensitivity integrated silicon nitride long period grating (LPG) refractometer based on a rib waveguide with sinusoidally modulated width is demonstrated. The sensor exhibits a very high refractometric sensitivity that remains constant over a broad spectral range and also has low temperature sensitivity and a simple fabrication process. These results demonstrate the feasibility of achieving both high sensitivity and a large dynamic range of the proposed refractometer through chip-scale photonic integration.
PHOTONICS RESEARCH
(2022)
Article
Optics
Sara M. Tariq, Makram A. Fakhri, Evan T. Salim, U. Hashim, Forat H. Alsultany
Summary: This study presents an unclad optical fiber biosensor based on localized surface plasmon resonance phenomenon. The sensor's performance is simulated using the finite element method, and gold nanoparticles are coated on the fiber for experimental analysis. Results show that blood plasma exhibits the highest sensitivity and resolution. The proposed sensor offers a low-cost and simple-geometry solution for biochemical sensing.
Article
Physics, Applied
Yibing Liu, Yadong Han, Junhong Yu, Hang Zhang, Qiangwei Yin, Hechang Lei, Jianbo Hu, Dayong Zhang
Summary: In this study, we systematically investigated the ultrafast coherent phonon dynamics in GdMn6Sn6 crystals as a function of temperature and excitation fluence using time-resolved pump-probe spectroscopy. It was found that the coherent phonon exhibits a hardening trend in frequency with a suppressed decay rate as the temperature decreases. Surprisingly, the frequency and decay rate of coherent phonons are almost independent of excitation fluence, suggesting a weak electron-phonon scattering process in GdMn6Sn6.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Marzieh Nadafan, Mohammad Reza Tohidifar, Maryam Karimi, Rasoul Malekfar, Gholamhossein Khorrami
CERAMICS INTERNATIONAL
(2018)
Article
Chemistry, Multidisciplinary
Mohammad Mazloum-Ardakani, Zahra Dehghani, Alireza Khoshroo
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2018)
Article
Optics
Z. Dehghani, Z. Shadrokh
Article
Nanoscience & Nanotechnology
Z. Dehghani, A. Vejdani Noghreiyan, M. Nadafan, M. H. Majles Ara
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2018)
Article
Chemistry, Physical
M. H. Majles Ara, Z. Dehghani
JOURNAL OF MOLECULAR LIQUIDS
(2019)
Article
Optics
M. H. Majles Ara, Z. Dehghani, M. Nadafan
OPTICS AND LASER TECHNOLOGY
(2019)
Article
Materials Science, Ceramics
A. Faraji Alamouti, M. Nadafan, Z. Dehghani, M. H. Majles Ara, A. Vejdani Noghreiyan
Summary: The study focuses on the structure and nonlinear optical properties of γ-Al2O3 nanoparticles prepared by the sol-gel technique, revealing self-focusing nonlinearity and saturable absorption processes. The complex refractive index and dielectric coefficient of the specimens were determined using Z-scan method and Fourier-transform infrared spectroscopy.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2021)
Article
Materials Science, Multidisciplinary
Sh Tabatabai Yazdi, M. Mousavi, Gh H. Khorrami
Summary: V2-xCoxO5 nanoparticles with Co concentrations up to x = 0.2 were synthesized via a sol-gel route in gelatin medium. The synthesized particles mainly consist of crystalline alpha-V2O5 phase, with the particle size increasing from about 34 to 49 nm as the Co content rises. These nanoparticles are found to be direct band gap semiconductors with band gap energies controlled by surface and interface effects rather than chemical composition, and the ferromagnetic nature is influenced by Co substitution.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Optics
Z. Dehghani, M. Nadafan, A. Faraji Alamouti
Summary: Lead sulfide quantum dots were synthesized using an aqueous method with TGL and DTG as capping agents, showing nanoscale particles with blue shifts in transverse and longitudinal optical frequencies. High dielectric constant of PbS QDs makes them suitable for smart materials, and nonlinear optical properties were enhanced by increasing laser power.
Article
Materials Science, Ceramics
M. Nadafan, Z. Dehghani, A. Faraji Alamouti, A. Vejdani Noghreiyan
Summary: Magnesium oxide nanoparticles prepared by sol-gel method were characterized by SEM and FTIR spectroscopy, and their grain size increased after gamma irradiation. The optical responses of magnesium oxide nanoparticles improved after gamma irradiation, although defects were created in its structure as a result. The FTIR spectra were used to calculate the complex refractive index and dielectric constant of the nanoparticles, showing a decrease in optical constants after gamma irradiation.
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2022)
Article
Physics, Applied
Z. Dehghani, F. Ostovari, M. Nadafan
Summary: Solvothermal synthesized MoSe2 nanosheets were characterized for their structure and optical properties. The results showed high-purity MoSe2 with a 2D layer structure, as well as saturable absorption and self-focusing behavior. Fourier transform infrared spectroscopy confirmed the presence of MoSe2 ions.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Gh. H. Khorrami, M. Nadafan, Z. Dehghani, A. Izadi-Darbandi, Gomaa A. M. Ali
Summary: In this study, the effect of MnO doping on the optical properties of MgO was investigated, and it was found that increasing MnO content alters the crystal structure and morphology, decreases the band gap, and enhances nonlinear optical response. This material shows promising potential for photonics and optical devices.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
M. Nadafan, Gh. h. Khorrami, M. Arab, Z. Dehghani, A. Kompany
Summary: Zn(1-x)CrxAl2O4 (x = 0.00, 0.05, 0.10, 0.20) nanoparticles were synthesized using gelatin as a polymerization agent. The structure and morphology were analyzed by X-ray diffraction and scanning electron microscopy. The results showed that the samples were polycrystalline and crystallized in a cubical spinel phase. Increasing the percentage of Cr led to a decrease in crystallite size and energy bandgap. The Z-scan approach was used to study the nonlinear absorption coefficient and refractive index of the samples.
Article
Nanoscience & Nanotechnology
Z. Dehghani, S. Nezamdoost, A. Vejdani Noghreiyan, M. Nadafan
Summary: In this research, gamma-Al2O3 nanoparticles were synthesized and their photon attenuation properties were measured at different photon energies. The impact of gamma-irradiation on these nanoparticles was evaluated by investigating the attenuation coefficients before and after irradiation. The structural properties of the nanoparticles were characterized using UV-Vis spectroscopy, x-ray diffraction patterns, and scanning electron microscopy images.
Article
Energy & Fuels
Zohreh Shadrokh, Shima Sousani, Somayeh Gholipour, Zahra Dehghani, Yaser Abdi, Bart Roose
Article
Materials Science, Multidisciplinary
Zhiqiang Li, Xiaoxiao Hu, Zhao-Yun Zeng, Yajiang Chen, Ai-Xi Chen, Xiaobing Luo
Summary: This work demonstrates how the current phase transition of atomic Bose-Einstein condensates in a trap can be controlled by applying an oscillatory driving field. The self-trapping effect in momentum space allows for a suppression of oscillations and a nearly constant directed current. Mean-field chaos serves as an indicator of the quantum phase transition. These findings are supported by an effective three-mode model.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jinqin Ye, Yi Li, Jun Ding, Heng Yu, Xianqi Dai
Summary: Constructing van der Waals heterostructures is an efficient approach to enhance the properties and broaden the applications of two-dimensional materials. This study explores the structure, stability, electronic, and optical properties of BlueP/MoSSe heterostructures using density functional theory calculations. It is found that the bandgap and band edge of these heterostructures can be effectively modulated by strain and electric field.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Simone Anzellini, Silvia Boccato, Samuel R. Baty, Leonid Burakovsky, Daniele Antonangeli, Daniel Errandonea, Raffaella Torchio
Summary: The melting line of cobalt was investigated through experimental and theoretical methods, revealing a phase transition from hexagonal close-packed structure to face-centered cubic structure at high temperatures. The melting temperatures obtained from both methods showed good agreement and can be described by a Simon-Glatzel equation. Additionally, a thermal equation of state for the face-centered cubic phase of cobalt was determined.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jiajuan Qing, Shisheng Zhou, Jimei Wu, Mingyue Shao
Summary: This paper investigates the nonlinear chaotic vibrations of fractional viscoelastic PET membranes subjected to combined harmonic and variable axial loads. The viscoelasticity of PET membrane is characterized by the fractional Kelvin-Voigt model. The reliability of the numerical strategy is proved by comparing the results with available fractional systems and examples. The influence of system parameters on chaotic behaviors is described using bifurcation diagrams and detailed responses. This research provides a fundamental framework for controlling viscoelastic substrates in flexible manufacturing.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aly R. Seadawy, Syed T. R. Rizvi, Bazgha Mustafa, Kashif Ali
Summary: In this research, the complete discriminant system of polynomial method is used to analyze the dynamic characteristics of the cubic-quintic nonlinear Schrodinger equation with an additional anti-cubic nonlinear term, with a focus on the introduction of various optical solitons and wave structures. The analysis illustrates the importance of the polynomial method and provides dynamic results for the solutions.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Ruihang Huang
Summary: This study utilized bibliometric analysis to examine the development of multi-scale calculation of carbon nanotubes. Using CiteSpace III software, 1253 relevant articles from the SCI Expanded database were analyzed to identify research trends in this field. The findings revealed significant progress in the research of multi-scale calculation of carbon nanotubes from 1999 to 2023. The analysis of keywords, literature co-citation network, and keyword cluster network provided valuable insights into the knowledge base, important research results, and research hotspots in this field. Additionally, the study predicted future hot research directions using keyword breakout analysis. The research provides profound insights and important guidance for researchers and policymakers in the field of multi-scale calculation of carbon nanotubes to promote further innovation and development.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xiaohua Zhou, Erhu Zhang, Shumin Zhao, Lei Zhang
Summary: A theoretic model is proposed to study the adhesion behavior of a vesicle adhering inside another vesicle in 2-D case. The model investigates the equilibrium shape equations and boundary conditions, and reveals the phase diagram and critical adhesion condition in different situations.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xin Yi, Jia-Cheng Huo, Yong-Pan Gao, Ling Fan, Ru Zhang, Cong Cao
Summary: The paper introduces an iterative quantum algorithm based on quantum gradient descent to solve combinatorial optimization problems, verifying the effectiveness and robustness of the algorithm through numerical simulations and comparison with other algorithms. Experimental results on a real quantum computer also demonstrate the feasibility and performance of the algorithm.
RESULTS IN PHYSICS
(2024)