Article
Optics
Rashid A. Ganeev
Summary: The study reports on the generation of high-order harmonics in Se-containing plasmas. A plasma formed by ablating selenium in a vacuum showed resonance enhancement of the 35th harmonic at the shortest reported wavelength (λ ≈ 22.9 nm, E-ph ≈ 54.14 eV). The presence of selenium in the molecular state (ZnSe and HgSe) was studied for its influence on the suppression of resonance effect during harmonics generation in plasma. The enhanced 35th harmonic was analyzed using different methods of plasma formation and was measured to have an enhancement factor of 32x compared to neighboring lower-order harmonics in the case of picosecond-pulses-induced Se plasma. The role of strong ionic transition of Se at 22.7 nm in the observation of resonance-induced enhancement of a single harmonic is discussed.
Article
Optics
Patrick Mutter, Kjell Martin Molster, Andrius Zukauskas, Valdas Pasiskevicius, Carlota Canalias
Summary: We demonstrate first-order quasi-phase-matched backward second-harmonic generation with an efficiency of 18.7%, which represents a significant improvement compared to earlier experiments. The efficient backward second-harmonic generation is achieved in bulk periodically poled Rb:KTiOPO4 with a poling period of 317 nm. By investigating the properties of backward second-harmonic generation, such as spectral bandwidth, temperature tuning, and temperature bandwidth, we compare them with co-propagating second harmonic generation and explore the potential applications.
Article
Optics
Rashid A. Ganeev, Hiroto Kuroda
Summary: The study demonstrates variations in single harmonic resonance enhancement in zinc-containing species during high-order harmonics generation under different laser sources, with notable effects from zinc selenides. The changes in single harmonic enhancement are shown using fixed and tunable radiation.
Article
Optics
Yan Jiang, Zi-Yu Chen, Zhanjun Liu, Lihua Cao, Chunyang Zheng, Rui Xie, Yue Chao, Xiantu He
Summary: Through particle-in-cell simulations, giant isolated attosecond pulses can be directly generated from relativistic laser-driven plasmas, offering a promising alternative for ultrafast studies with high intensity without the need for further spectral filtering. The underlying radiation mechanism is coherent synchrotron emission, allowing the transmitted pulses to reach relativistic intensity.
Article
Chemistry, Multidisciplinary
Rashid A. Ganeev, Hiroto Kuroda
Summary: This study reexamines the resonance enhancement of single harmonic emissions during the propagation of ultrafast pulses through atomic and nanoparticle tin-containing laser-induced plasma. Differences in enhancement factors in different conditions were observed, with optimal delays identified for maximal harmonic yield. Two-color pump cases showed a significant increase in even harmonics, while the dependence of this process on plasma composition under different target ablation conditions was demonstrated.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Applied
Rashid A. Ganeev, Ganjaboy S. Boltaev, Vyacheslav V. Kim, Mazhar Iqbal, Hiroto Kuroda, Ali S. Alnaser
Summary: This study reexamines the mechanism of resonance enhancement of a single harmonic during high-order harmonic generation in indium, zinc, and chromium-contained atomic and molecular plasmas. It was found that oxides, selenides, and phosphides of these metals notably reduce the enhancement of a single harmonic due to either a shift of the ionic transitions possessing strong oscillator strength out of the wavelength of those harmonics or a reduction of the oscillator strength of these transitions. The application of different wavelengths of driving pulses drastically changes the enhancement of a single harmonic in indium-contained plasmas.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Optics
Mangaljit Singh, Muhammad Ashiq Fareed, Vasily Strelkov, Alexei N. Grum-Grzhimailo, Alexander Magunov, Antoine Laramee, Francois Legare, Tsuneyuki Ozaki
Summary: Resonant high-order harmonics have been demonstrated in the multiphoton-ionization regime, achieving intense harmonics with high intensity enhancement and monochromaticity without the need for extreme ultraviolet filtering methods, thus preventing photon flux loss. This research provides a new method for increasing the intensity of extreme ultraviolet light and facilitates a better understanding of autoionizing resonances in generating resonant harmonics in the multiphoton-ionization regime.
Article
Mathematics, Applied
Jared C. Bronski, Timothy Ferguson
Summary: This paper reveals the algebraic-combinatorial structure underlying the second order networks (SONETS) random graph model proposed by Zhao et al., and demonstrates its connection with a non-commuting generalization of the classical Johnson scheme. The study shows that the algebraic structure leads to simplified numerical methods for implementing the SONETS algorithm, and that the method can be generalized to different types of vertices and edges while maintaining similar algebraic structure.
PHYSICA D-NONLINEAR PHENOMENA
(2022)
Article
Optics
Xiao-Xin Huo, Yun-He Xing, Tong Qi, Yue Sun, Bo Li, Jun Zhang, Xue-Shen Liu
Summary: Through numerical simulations, we investigated elliptical high-order harmonic generation from H-2(+) molecule under orthogonally polarized two-color laser fields. Odd-order harmonics in the x component and even-order harmonics in the y component can be generated at a specific alignment angle of theta = 0 degrees. The intensity distribution and ellipticity distribution of the harmonics vary significantly with different intensity ratios and alignment angles of the laser fields.
Article
Chemistry, Multidisciplinary
Soohyung Lee, Chad E. Hoyer, Can Liao, Xiaosong Li, Vincent C. Holmberg
Summary: This study reports the phase-controlled synthesis of colloidal silver iron sulfide (AgFeS2) nanocrystals and investigates their resonant light-matter interactions. The composition of the product can be selectively shifted by adjusting the coordinating ligand concentration, impacting the crystal structure and optical properties. The strong UV-visible extinction peak exhibited by AgFeS2 nanocrystals is attributed to a quasi-static dielectric resonance, expanding the library of underexplored intermediate-band semiconductor nanocrystals with unique optical properties.
Article
Physics, Condensed Matter
Adil Qayyum, Musarat Abbas
Summary: This study investigates the reflection and transmission coefficients of a S-polarized electromagnetic wave when it excites a linear dielectric-nonlinear dielectric planar interface. The nonlinear medium in this study is of second harmonic generation type, thus only the second order reflectivity and transmittance characteristics are examined. The wave propagation in nonlinearly, inhomogeneous and anisotropic dispersive (NID) media is modeled using the method of separation of variables in NID space. The solution to the nonlinear wave equation is obtained using the quasi phase matching approximation. The behavior of the coefficients is also studied when EN-NID and MN-NID media are used as the reflected medium in a special case of the original geometry. The impact of non-linearity and noninteger dimensions are considered separately, and specific ranges of permittivities and permeability for achieving maximum coefficient amplitude are reported.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Vyacheslav V. V. Kim, Srinivasa Rao Konda, Weili Yu, Wei Li, Rashid A. A. Ganeev
Summary: In this study, we generated harmonics of laser pulses in the extreme ultraviolet range using carbon-containing plasma and analyzed the spectral characteristics. We found that the nanoparticles-contained plasma demonstrated chirp-related harmonic cut-off scaling, which was validated by simplified two-color pump model calculations.
Article
Physics, Multidisciplinary
Pavel Sasorov, Francesco Pegoraro, Timur Esirkepov, Sergei Bulanov
Summary: This study investigates high order harmonic generation by extremely intense, interacting, electromagnetic waves in the quantum vacuum within the framework of the Heisenberg-Euler formalism. It considers two intersecting plane waves of finite duration with general polarizations, obtaining detailed finite expressions for the case where only the first Poincare invariant does not vanish, resulting in the most effective yields of high harmonics.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Gang Yang, Xingxing Jiang, Chao Wu, Zheshuai Lin, Zhipeng Huang, Mark G. Humphrey, Chi Zhang
Summary: Two chalcogenide crystalline compounds, [enH(2)][Ag4Sb2S6] and [enH][Ag2SbS3], were successfully synthesized through mild ionothermal and solvothermal means. The [enH][Ag2SbS3] compound, which crystallizes in a noncentrosymmetric and polar space group, exhibits significant birefringence at 1064nm and is phase-matchable for SHG applications. The compounds' optical band gaps were also determined, and theoretical studies were conducted to further understand the relationship between band structure and nonlinear optical properties.
DALTON TRANSACTIONS
(2021)
Article
Optics
Xin Chen, Leszek Mateusz Mazur, Dawei Liu, Shan Liu, Xin Liu, Zhuo Xu, Xiaoyong Wei, Junli Wang, Yan Sheng, Zhiyi Wei, Wieslaw Krolikowski
Summary: In this study, we fabricated quadratic nonlinearity gratings in a tetragonal PMN-38PT crystal using an all-optical poling method and applied them in quasi-phase matched collinear second harmonic generation. By measuring the second harmonic output, we provided quantitative estimates of all three non-zero quadratic nonlinearity coefficients of the PMN-38PT crystal for the first time.
Article
Chemistry, Multidisciplinary
Zhihao Li, Xianggui Zhou, Subhash Singh, Xiaoming Wei, Chunlei Guo, Weishan Li
Summary: Platinum has high electrocatalytic activity but can be poisoned by certain substances. This study reveals that platinum loses its electrocatalytic activity for methanol oxidation in the presence of lead contamination. The decrease in activity is demonstrated by comparing methanol oxidation current using a lead counter electrode versus a platinum counter electrode. The mechanism is attributed to the adsorption of trace lead ions from the lead counter electrode, as confirmed by calculating binding energies. This report is important for the design and management of direct methanol fuel cells, considering the potential negative effect of trace lead contamination.
CHINESE CHEMICAL LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Srinivasa Rao Konda, Rashid A. Ganeev, Vyacheslav V. Kim, Ravi Ketavath, Jiaqi Yu, Wei Li
Summary: This study demonstrates high-order harmonic generation and analyzes the harmonic properties by ablating nickel-doped CsPbBr3 perovskite nanocrystals using different types of pulses. The presence of nickel dopants and CsPbBr3 plasma components improves the emission of harmonics, and the spectral shift of harmonics generated from nickel-doped CsPbBr3 perovskite nanocrystals can be used to form tunable extreme ultraviolet sources.
Article
Chemistry, Physical
Yu Liu, Gan Yuan, Fei Xie, Yang An, Jianwen Sun, Ning Zhao, Yongbo Deng, Longnan Li, Subhash C. Singh, Chi-Vinh Ngo, Wei Li, Chunlei Guo
Summary: Water, sanitation, and hygiene (WASH) investments are crucial to prevent and recover from pandemics and outbreaks, and to prevent antimicrobial resistance. However, over 2 billion people lack access to proper sanitation, leading to devastating impacts on public health and economic development. A femtosecond laser processing technology combined with silicone oil coating has been developed to create a slippery surface that repels feces, known as the fecalphobic surface. This surface requires minimal water and allows for easy removal of solids, improving sanitation solutions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Biochemistry & Molecular Biology
Mottamchetty Venkatesh, Vyacheslav V. V. Kim, Ganjaboy S. S. Boltaev, Srinivasa Rao Konda, Peter Svedlindh, Wei Li, Rashid A. A. Ganeev
Summary: Transition metal dichalcogenides, such as molybdenum disulfide (MoS2), with plasma state dopants, demonstrate the generation of intense high-order harmonics. MoS2 nanoflakes and nickel-doped MoS2 nanoflakes exhibit stronger harmonics compared to Mo bulk and MoS2 bulk. However, MoS2 with nickel nanoparticles and carbon nanotubes (MoS2-NiCNT) produces weaker coherent XUV emissions due to phase mismatch. The influence of heating and driving pulse intensities on harmonic yield and cut-off energies are investigated in MoS2 molecular structures.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Optics
Rashid A. Ganeev
Summary: We demonstrate the double-peak spectral splitting in high-order harmonics generated in graphite plasma, which is mainly due to the propagation effects of high harmonics in the ionizing medium. The splitting of high harmonics can also be explained as a result of the double-peak structure in the spectral profile of the propagated driving pulse. The shift and intensity of these peaks, compared with unshifted harmonics, depend on different parameters of the experiment such as plasma density, the position of the focal plane, and laser intensity.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2023)
Article
Optics
Kwang Jin Lee, Ran Wei, Ye Wang, Jihua Zhang, Wenchi Kong, Sandeep Kumar Chamoli, Tao Huang, Weili Yu, Mohamed ElKabbash, Chunlei Guo
Summary: Placing three-dimensional lead-halide perovskite films on hyperbolic metamaterials can significantly decrease the recombination rate and prolong the carrier lifetime. This decrease is attributed to the dominant in-plane transition dipole of the films. The insights gained from this study offer novel means to enhance the efficiency of perovskite-based optoelectronic and photonic devices.
Article
Materials Science, Multidisciplinary
Srinivasa Rao Konda, Rahul A. Rajan, Subhash Singh, Rashid A. Ganeev, Venugopal Rao Soma, Amit Srivastava, Mottamchetty Venkatesh, Chunlei Guo, Wei Li
Summary: In this work, the third-order nonlinear optical properties of pure tungsten disulfide (WS2) nanolayers decorated with NiO nanoparticles (NPs) were measured using femtosecond Z-scan measurements. The inclusion of NiO NPs increased the nonlinear absorption at 800 and 400 nm wavelengths. The nonlinear absorption mechanism of WS2 nanolayers can be switched from saturable absorption to two-photon absorption or reverse saturable absorption by changing the pump intensity with the embedded NiO NPs playing a crucial role.
Article
Optics
R. A. Ganeev
Summary: This study examines the generation of strong harmonics and sum and difference frequencies by propagating three pulses with different wavelengths and polarizations through Ag, Au, Pb, B, and C plasmas. The results demonstrate that difference frequency mixing is more efficient compared to the sum frequency mixing. Under optimal conditions for laser-plasma interaction, the intensities of the sum and difference components are almost equal to the intensities of neighboring harmonics attributed to the strong 806 nm pump.
Article
Chemistry, Multidisciplinary
Chi-Vinh Ngo, Yu Liu, Wei Li, Jianjun Yang, Chunlei Guo
Summary: Conversion of a regular metal surface to a superhydrophobic one using laser processing shows great potential for applications such as anti-fouling, anti-corrosion, and anti-icing. This study demonstrates a facile laser technique that can convert the wetting behavior of aluminum surface from hydrophilic to hydrophobic and superhydrophobic with single-shot nanosecond laser irradiation. This technique offers a fast and scalable method to produce laser-induced surface superhydrophobicity.
Article
Chemistry, Physical
Chaudry Sajed Saraj, Subhash C. Singh, Gopal Verma, Amged Alquliah, Wei Li, Chunlei Guo
Summary: Researchers developed a physical method of electric field-assisted pulsed laser ablation in liquid for the synthesis of pure CuMoO4 (CMO) electrocatalysts. This method can control the morphology, crystallinity, and composition of the catalysts and enhance their hydrogen evolution reaction performance.
APPLIED SURFACE SCIENCE ADVANCES
(2023)
Article
Optics
Rashid A. Ganeev, Vyacheslav V. Kim, Jelena Butikova, Aigars Atvars, Jurgis Grube, Anatolijs Sarakovskis, Arnolds Ubelis
Summary: We demonstrate the generation of high-order harmonics of laser pulses in palladium and cadmium plasmas. Resonance enhancement in different ranges of extreme ultraviolet region was investigated by adjusting the wavelength of driving pulses. The summation of incommensurate waves during the two-color pump of Pd and Cd plasmas allowed the generation of a broader range of harmonics. The theoretical aspects of the two-color pump of the laser-induced plasma are discussed.
Article
Chemistry, Multidisciplinary
Zihao Li, Luheng Tang, Hanbin Wang, Subhash C. Singh, Xiaoming Wei, Zhongmin Yang, Chunlei Guo
Summary: This paper reports a novel water collector design based on a nature-inspired hybrid superhydrophilic/superhydrophobic aluminum surface, which can provide a sustainable solution to global water shortage. The surface, fabricated by combining laser and chemical treatments, achieves a 163° contrast in contact angles between the superhydrophilic pattern and the superhydrophobic background. This unique superhydrophilic/superhydrophobic combination presents a self-pumped mechanism, providing the hybrid collector with highly efficient water harvesting performance. Based on simulations and experimental measurements, the water harvesting rate of the repeating units of the pattern was optimized, and the corresponding hybrid collector achieves a water harvesting rate of 0.85 kg m(-2) h(-1). Additionally, the hybrid collector exhibits good stability, flexibility, as well as thermal conductivity, showing great potential for practical application.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Computer Science, Information Systems
Fatemeh Bazouband, Mahdieh Hashemi, Elaheh Bazouband, Rashid A. Ganeev, Andra Naresh Kumar Reddy
Summary: In this study, a geometric metasurface with dielectric cross-shaped metaatoms is presented, which can transport the conjugate focal spot of the AFAB into real space and adjust the focal positions and intensities without redesigning metaatoms architecture. The cross-shaped meta-atoms with complete control of the incident light's amplitude and phase generate six focal spots with high adjustable intensities in free space.
Article
Nanoscience & Nanotechnology
Victor Kaercher, Vyacheslav V. Kim, Andra Naresh Kumar Reddy, Helmut Zacharias, Rashid A. Ganeev
Summary: This study reports the generation of vector and vortex high-order harmonic beams using phase-modifying optical elements. By combining two-color pump-enhanced harmonics with polarization-structured beams, spatially structured and twisted wavefront harmonics are generated.
