Article
Physics, Fluids & Plasmas
P. Walch, L. Arantchouk, B. Mahieu, M. Lozano, Y. -B. Andre, A. Mysyrowicz, A. Houard
Summary: This study focuses on the creation and evolution of long-lived meter-scale laser-guided electric discharges and their interaction. The lifetime of guided discharges is extended to several milliseconds by injecting additional current from a Tesla high voltage generator. The discharge evolution is analyzed by recording the electric current and using Schlieren and fluorescence imaging. A thermodynamic model is developed to explain the gas evolution during the discharge. Furthermore, the succession of laser-guided discharges generated at 10 Hz is analyzed.
PHYSICS OF PLASMAS
(2023)
Review
Chemistry, Multidisciplinary
Joshua Saczek, Xiaoxue Yao, Vladimir Zivkovic, Mohamed Mamlouk, Dan Wang, Stevin S. Pramana, Steven Wang
Summary: Liquid marbles encapsulate various liquids with hydrophobic particles, providing isolation from the external environment, but face limitations in lifetime and robustness. By manipulating particle characteristics and environments, improvements in stability can be achieved. Emerging applications such as unconventional computing, cell mimicry, and soft lithography benefit from liquid marble technology.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Ezman Karabulut, Fatih Ahmet Celik, Ebru Tanboga Korkmaz
Summary: This study investigated the formation of long-lived reactive NO2 molecules in a dry and clean air environment under a high-temperature shock wave. The DFTB3 model was used to examine the related reactions, which showed that the hypothesis of geophysicists regarding the origin of NO2 formed in lightning flash events was disproved. It was proven that the presence of NO3 molecules that can withstand high temperatures should be evaluated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Neurosciences
Sulagna Das, Pablo J. Lituma, Pablo E. Castillo, Robert H. Singer
Summary: This study reveals that activity-dependent expression of immediate early genes (IEGs) is critical for long-term synaptic remodeling and memory. The researchers monitored the dynamics of Arc mRNA, an IEG essential for memory consolidation, and found that a single burst stimulation can induce cycles of transcriptional reactivation and subsequent transcription cycles require translation. This transcription-translation coupling sustains protein expression and provides a mechanism for short-lived events to support long-term memory.
Article
Materials Science, Multidisciplinary
Debsuvra Mukhopadhyay, Jayakrishnan M. P. Nair, G. S. Agarwal
Summary: In this paper, a scheme to substantially amplify the transfer efficiency of spin-wave excitations between separate magnetic samples through cavity-mediated magnon-magnon coupling is presented. The physical origin of the enhancement is explained, which is attributed to the recurrent multiphoton absorption by the cavity and the emergence of parametrically induced strong coherences. The enhancement can be considerably high within the stable dynamical region, leading to a significantly amplified spin-current response from one of the magnetic samples.
Article
Physics, Multidisciplinary
Diptesh Dey, Alexander I. Kuleff, Graham A. Worth
Summary: The study investigates the creation and dynamical fate of a coherent superposition of electronic states generated in a polyatomic molecule through broadband ionization, as well as the effect of nuclear dynamics on electronic coherence. The key goal of attosecond science is to control electronic motion and design laser control schemes to prolong coherence.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Pierre Walch, Benoit Mahieu, Victor Moreno, Thomas Produit, Ugo Andral, Yves-Bernard Andre, Laurent Bizet, Magali Lozano, Clemens Herkommer, Michel Moret, Robert Jung, Robert Bessing, Sandro Klingebiel, Yann Bertho, Thomas Metzger, Andre Mysyrowicz, Jean-Pierre Wolf, Jerome Kasparian, Aurelien Houard
Summary: In the framework of the Laser Lightning Rod project, the spatial evolution of laser-induced filaments is investigated over a distance of 140 m using different laser parameters.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Mario Gutierrez, Cristina Martin, Johan Hofkens, Jin-Chong Tan
Summary: Long-lived emissive materials based on room temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) are essential for the development of optical sensors, security systems, and solid-state lighting. By utilizing metal-organic frameworks (MOFs) to inhibit molecular motions/vibrations, researchers can design materials with RTP and TADF emissions. This study explores the relationship between linker arrangement and physicochemical properties in two isochemical MOFs with different crystalline structures, demonstrating their potential applicability in photonic technologies.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Review
Chemistry, Multidisciplinary
Truong-Son Dinh Le, Hoang-Phuong Phan, Soongeun Kwon, Sangbaek Park, Yeongju Jung, Jinki Min, Byung Jae Chun, Hana Yoon, Seung Hwan Ko, Seung-Woo Kim, Young-Jin Kim
Summary: Laser-induced graphene (LIG) is a newly emerging 3D porous material with high porosity, excellent electrical conductivity, and good mechanical flexibility. LIG can be directly fabricated on carbon materials using laser beam, offering controllable properties and wide application potentials.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Computer Science, Theory & Methods
Juan Carlos Salinas-Hilburg, Marina Zapater, Jose M. Moya, Jose L. Ayala
Summary: The text discusses a fast energy estimation framework for long-running applications in data center facilities, which uses application signatures to estimate CPU and memory energy consumption without complete execution. The framework achieves low estimation errors and high Compression Ratio values, demonstrating its effectiveness in improving energy efficiency.
FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF ESCIENCE
(2021)
Article
Optics
Zili Chen, Zhipeng Chen, Wei Jiang, Lianbo Guo, Ya Zhang
Summary: We propose a new simulation method for laser-induced breakdown spectroscopy in nonlocal thermodynamic equilibrium. Our method utilizes the particle-in-cell/Monte Carlo collision model to calculate dynamic processes and line intensity of nonequilibrium laser-induced plasma in the afterglow phase. The effects of ambient gas pressure and type on the plasma evolution are investigated. This simulation provides a more detailed understanding of the nonequilibrium processes compared to current fluid and collision radiation models. Our simulation results are in good agreement with experimental and SimulatedLIBS package results.
Article
Engineering, Electrical & Electronic
Abir Alabani, Prem Ranjan, Jun Jiang, Lujia Chen, Ian Cotton, Vidyadhar Peesapati
Summary: This article investigates the characteristics of high current arc faults generated at the ac frequencies expected in future rotating machines used for higher voltage aerospace systems. The results show that high-frequency arcs exhibit similar characteristics to lower-frequency arcs. Reducing pressure results in lower arc voltage and arc power.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Chemistry, Physical
Jun Cao, Chunjie Yan, Zefan Chai, Zhigang Wang, Minghe Du, Gen Li, Huanwen Wang, Heng Deng
Summary: This study presents a novel strategy to transform natural rhodochrosite into ultrafine manganese dioxide nanoparticles using a scalable and cost-effective laser process. The resulting MnO2/LIG composites exhibit high specific capacitance and excellent cycling stability, making them promising for micro-supercapacitors and lithium-ion batteries.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Editorial Material
Multidisciplinary Sciences
Deepak Adhikari, John Carroll
Summary: To ensure the health of the next generation and prevent unwanted mutations, egg cells have discovered a mechanism to avoid damage caused by harmful reactive oxygen species. The production of reactive oxygen species is minimized in oocytes.
Review
Chemistry, Multidisciplinary
Le Cheng, Weihua Guo, Xiaohu Cao, Yubing Dou, Libei Huang, Yun Song, Jianjun Su, Zhiyuan Zeng, Ruquan Ye
Summary: The successful exfoliation of few-layer graphene from monolith graphite in 2004 has led to an exponential growth in graphene research. A decade later, a cost-effective method to synthesize high-quality graphene, known as laser-induced graphene (LIG), was discovered. LIG has shown great potential in environmental applications, with advances in synthetic techniques and challenges in addressing different environmental issues.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Physics, Multidisciplinary
V. T. Tikhonchuk, Y. Liu, R. Danylo, A. Houard, A. Mysyrowicz
Summary: The article proposes a model to explain delayed cavity-free forward lasing observed in nitrogen, involving ionization and excitation of nitrogen molecules followed by emission of excited ions. The model identifies two regimes of signal amplification and demonstrates good agreement with experimental results.
NEW JOURNAL OF PHYSICS
(2021)
Article
Optics
Rostyslav Danylo, Guillaume Lambert, Yi Liu, Vladimir Tikhonchuk, Aurelien Houard, Andre Mysyrowicz
Summary: By double excitation of nitrogen molecules with intense femtosecond laser pulses, the time profile of a lasing signal at 391.4 nm was measured, showing an abrupt decrease in emission at the arrival of the second pulse. This decrease is attributed to electron transfer from the ground state to the first excited ionic level and disruption of coherence.
Article
Optics
O. Kosareva, N. Panov, D. Shipilo, D. Mokrousova, I Nikolaeva, E. Mitina, A. Koribut, A. Reutov, G. Rizaev, A. Couairon, A. Houard, D. Skryabin, A. Saletskiy, A. Savel'ev, L. Seleznev, A. Ionin, S. L. Chin
Summary: The study revealed that pulses at 744 nm can generate filaments and high-intensity light channels during propagation, forming spectral humps up to 850 nm. Simulations showed that these spectral humps indicate the formation of a train of femtosecond pulses at predictable positions in the propagation path.
Article
Physics, Applied
O. G. Kosareva, D. V. Mokrousova, N. A. Panov, I. A. Nikolaeva, D. E. Shipilo, E. V. Mitina, A. V. Koribut, G. E. Rizaev, A. Couairon, A. Houard, A. B. Savel'ev, L. V. Seleznev, A. A. Ionin, S. L. Chin
Summary: Experimental observation of laser-induced remote high-voltage discharge triggering between needle electrodes with half-a-cm spacing was carried out, showing a high triggering probability in the 45-60 m range from the laser output.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Daria V. Mokrousova, Dmitrii V. Pushkarev, Nikolay A. Panov, Irina A. Nikolaeva, Daniil E. Shipilo, Nikita A. Zhidovtsev, Georgy E. Rizaev, Daria S. Uryupina, Arnaud Couairon, Aurelien Houard, Dmitry V. Skryabin, Andrey B. Savel'ev, Olga G. Kosareva, Leonid V. Seleznev, Andrey A. Ionin
Summary: The study investigates the postfilamentation channel resulting from the filamentation of 744-nm, 5-mJ, 110-fs pulse in the corridor air. It was found that the postfilament extends longitudinally from the compressor output to a distance of 55-95 m. The spectral changes in the postfilamentation channel increase with distance, while the beam divergence and pulse duration show stability within certain ranges of the propagation distance.
Article
Optics
V Jukna, S. Albert, C. Millon, B. Mahieu, R. Guillermin, G. Rabau, D. Fattaccioli, A. Mysyrowicz, A. Couairon, A. Houard
Summary: Experiments and simulations were conducted to investigate filamentation and generation of acoustic waves in water using loosely focused multi-millijoules laser pulses. The results showed a transition from filamentary propagation to localized breakdown when the laser pulse duration increased, indicating the significant role of Kerr self-focusing in the beam propagation dynamics. Furthermore, the shape, amplitude, and spectrum of the resulting pressure wave strongly depended on the laser pulse duration.
Article
Optics
U. Andral, P. Walch, V Moreno, B. Mahieu, T. Produit, M. Lozano, L. Bizet, C. Herkommer, M. Moret, Y-B Andre, P. Krotz, T. Metzger, K. Michel, A. Mysyrowicz, J. Kasparian, D. Lupinski, A. Houard, J-P Wolf
Summary: This paper reports the high energy conversion efficiencies of up to 59% for second harmonic generation (SHG) and 27% for third harmonic generation (THG) achieved by laser pulses with high peak power in the sub-TW range and average powers in the sub-kW range. No damage or efficiency decrease is observed after more than 100 hours of operation. The resulting high-energy visible and near-UV pulses are suitable for various applications.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
Article
Optics
Liang Xu, Qi Lu, Vladimir T. Tikhonchuk, Bin Zhou, Runzhe Yang, Qingqing Liang, Feng He, Rostyslav Danylo, Aurelien Houard, Andre Mysyrowicz, Yi Liu
Summary: This paper investigates the population distribution in N-2(+) under the excitation of pump laser using a quantum-mechanical time-domain incoherent superposition model and a quasi-classical model. The results show that the quasi-classical model underestimates the population inversions corresponding to certain optical transitions, and a fast and accurate correction is proposed. This work solidifies the theoretical models for population distribution in N-2(+) and paves the way for understanding its lasing mechanism.
Article
Optics
Silin Fu, Benoit Mahieu, Andre Mysyrowicz, Aurelien Houard
Summary: This study investigates the filamentation of optical vortices in air and compares them with the classical filamentation regime. It is found that optical vortices generate a more uniform heating effect along the propagation axis and the resulting low-density channel is less sensitive to the laser input power due to filamentation intensity clamping and phase vorticity.
Article
Chemistry, Analytical
Yuri E. Geints, Olga V. Minina, Ilia Yu. Geints, Leonid V. Seleznev, Dmitrii V. Pushkarev, Daria V. Mokrousova, Georgy E. Rizaev, Daniil E. Shipilo, Irina A. Nikolaeva, Maria V. Kurilova, Nikolay A. Panov, Olga G. Kosareva, Aurelien Houard, Arnaud Couairon, Andrey A. Ionin, Weiwei Liu
Summary: This study delays the appearance of the high-intensity region by inserting metal-wire meshes with different cell sizes and confirms the delay effect as the cell size decreases.
Article
Optics
Aurelien Houard, Pierre Walch, Thomas Produit, Victor Moreno, Benoit Mahieu, Antonio Sunjerga, Clemens Herkommer, Amirhossein Mostajabi, Ugo Andral, Yves-Bernard Andre, Magali Lozano, Laurent Bizet, Malte C. Schroeder, Guillaume Schimmel, Michel Moret, Mark Stanley, W. A. Rison, Oliver Maurice, Bruno Esmiller, Knut Michel, Walter Haas, Thomas Metzger, Marcos Rubinstein, Farhad Rachidi, Vernon Cooray, Andre Mysyrowicz, Jerome Kasparian, Jean-Pierre Wolf
Summary: This study demonstrates for the first time that laser-induced filaments can guide lightning discharges over considerable distances. Field trials on the Santis mountain in Switzerland recorded the guiding of a negative lightning leader for a distance of 50 m, and this phenomenon was confirmed by interferometric measurements. This breakthrough has significant implications for lightning protection and opens up new possibilities for atmospheric applications of ultrashort lasers.
Article
Optics
Qi Lu, Xiang Zhang, Santiago Lopez, Haicheng Mei, Liang Xu, Qingqing Liang, Aurelien Houard, Vladimir Tikhonchuk, Andre Mysyrowicz, Eduardo Oliva, Yi Liu
Summary: We report a spectral splitting effect in the cavity-less lasing emission of nitrogen ions at 391.4 nm when pumped by 800-nm femtosecond laser pulses. The R and P branches both experience spectral splitting with increased nitrogen gas pressure and pump pulse energy. Similar split spectral line is observed for the amplified emission with external injected seeding pulse, but no such phenomenon is observed for fluorescence radiation with more abundant R branch structures. Our theoretical model considers gas ionization, excitation competition, and amplification in the plasma to explain this spectral splitting effect.
Article
Physics, Applied
R. Danylo, X. Zhang, A. Lisova, A. Houard, Y. Liu, V. Tikhonchuk, A. Mysyrowicz
Summary: In this study, the lasing characteristics of N(2)(+) under 428nm pumping are investigated by varying the time delay between two 800nm ultrashort pumping pulses. It is observed that the laser emission is significantly reduced when the time delay is in the range of -20ps < dt < +20ps. From the analysis of the quenching results, it is concluded that the mechanism of lasing corresponds to a coherent two-photon amplification scheme, rather than the common population-inverted one-photon amplification mechanism.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Shixiang Wang, Chenhui Lu, Zhengquan Fan, Aurelien Houard, Vladimir Tikhonchuk, Andre Mysyrowicz, Songlin Zhuang, Vasily A. Kostin, Yi Liu
Summary: The study demonstrates coherent control of nitrogen molecules ionization by femtosecond laser, with phase shifts between three laser colors affecting ionization degree. The observations suggest competition between different parametric channels influencing the ionization process.
Article
Physics, Applied
Thomas Produit, Pierre Walch, Clemens Herkommer, Amirhossein Mostajabi, Michel Moret, Ugo Andral, Antonio Sunjerga, Mohammad Azadifar, Yves-Bernard Andre, Benoit Mahieu, Walter Haas, Bruno Esmiller, Gilles Fournier, Peter Kroetz, Thomas Metzger, Knut Michel, Andre Mysyrowicz, Marcos Rubinstein, Farhad Rachidi, Jerome Kasparian, Jean-Pierre Wolf, Aurelien Houard
Summary: Lightning is highly destructive due to its high power density and unpredictable character. Laser technology is being developed to control and guide lightning for the protection of sensitive sites. The research project focuses on the propagation of laser in the multiple filamentation regime and its ability to control high-voltage discharges.
EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
(2021)
