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Ganeev RA. Quasi-phase-matching of resonance-enhanced high-order harmonics in laser plasmas. OPTICS EXPRESS 2023; 31:43748-43763. [PMID: 38178464 DOI: 10.1364/oe.502847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 11/15/2023] [Indexed: 01/06/2024]
Abstract
The resonance-enhanced harmonics in laser-induced arsenic and selenium plasmas are studied at the quasi-phase-matching (QPM) conditions. We demonstrate that the enhancement of these harmonics was significantly smaller than the one of the neighboring harmonics. Though the enhancement factors of the harmonics in the vicinity of resonance-enhanced harmonics were in the range of 5× to 18×, the resonance-enhanced harmonics were almost unenhanced at QPM conditions. The most probable reason for such restriction in the enhancement of specific harmonics at the conditions of QPM was a stronger influence of free electrons on the phase-matching conditions of the resonance-enhanced single harmonic compared to the QPM-enhanced group of harmonics.
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Ganeev RA. High-order harmonics enhancement in laser-induced plasma. Sci Rep 2023; 13:13951. [PMID: 37626128 PMCID: PMC10457400 DOI: 10.1038/s41598-023-41239-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 08/23/2023] [Indexed: 08/27/2023] Open
Abstract
The methods of enhancement of the strong high-order harmonics of femtosecond pulses in laser-induced plasma are demonstrated. It comprises the application of the four techniques allowing the enhancement of harmonics in different spectral ranges. Among them are the selection of targets for ablation to create the conditions for resonance enhancement of single harmonic, formation of the quasi-phase-matching of a spectrally tunable group of harmonics, application of the two-color pump of plasma, and the formation of nanoparticles-contained plasmas. The number of generated coherent XUV photons increased in the region of single resonantly enhanced harmonic (62 nm) and the shorter-wavelength region (30-50 nm). The above techniques of harmonics enhancement allowed a significant (up to 50 times) growth in a whole harmonic yield in the case of indium plasma. We discuss the reasons preventing the joint implementation of the four methods of harmonics enhancement in the same spectral region.
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Affiliation(s)
- Rashid A Ganeev
- Laboratory of Nonlinear Optics, Institute of Astronomy, University of Latvia, Riga, 1004, Latvia.
- Institute of Fundamental and Applied Research, TIIAME National Research University, Kori Niyazov Street 39, 100000, Tashkent, Uzbekistan.
- Chirchik State Pedagogical University, 104 Amir Temur, 111700, Chirchik, Uzbekistan.
- Department of Physics, Voronezh State University, Voronezh, 394006, Russia.
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Singh M, Fareed MA, Birulia V, Magunov A, Grum-Grzhimailo AN, Lassonde P, Laramée A, Marcelino R, Shirinabadi RG, Légaré F, Ozaki T, Strelkov V. Ultrafast Resonant State Formation by the Coupling of Rydberg and Dark Autoionizing States. PHYSICAL REVIEW LETTERS 2023; 130:073201. [PMID: 36867796 DOI: 10.1103/physrevlett.130.073201] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 01/11/2023] [Indexed: 06/18/2023]
Abstract
Studying the dynamics of dark states is challenging due to their inability to undergo single-photon emission or absorption. This challenge is made even more difficult for dark autoionizing states owing to their ultrashort lifetime of a few femtoseconds. High-order harmonic spectroscopy recently appeared as a novel method to probe the ultrafast dynamics of a single atomic or molecular state. Here, we demonstrate the emergence of a new type of ultrafast resonance state as a manifestation of coupling between Rydberg and a dark autoionizing state dressed by a laser photon. Through high-order harmonic generation, this resonance results in extreme ultraviolet light emission that is more than one order of magnitude stronger than for the off-resonance case. The induced resonance can be leveraged to study the dynamics of a single dark autoionizing state and the transient changes in the dynamics of real states due to their overlap with the virtual laser-dressed states. In addition, the present results allow the generation of coherent ultrafast extreme ultraviolet light for advanced ultrafast science applications.
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Affiliation(s)
- Mangaljit Singh
- Institut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - Muhammad Ashiq Fareed
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
| | - Valeryia Birulia
- Moscow Institute of Physics and Technology (National Research University), Institutskiy pereulok. 9, Dolgoprudny 141701, Russia
| | - Alexander Magunov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilova Street, 38, Moscow 119991, Russia
| | - Alexei N Grum-Grzhimailo
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Philippe Lassonde
- Institut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - Antoine Laramée
- Institut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - Romain Marcelino
- Institut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - Ramin Ghahri Shirinabadi
- Institut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - François Légaré
- Institut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - Tsuneyuki Ozaki
- Institut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, Canada
| | - Vasily Strelkov
- Moscow Institute of Physics and Technology (National Research University), Institutskiy pereulok. 9, Dolgoprudny 141701, Russia
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilova Street, 38, Moscow 119991, Russia
- Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Street, Nizhny Novgorod 603950, Russia
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High-order harmonics generation in the laser-induced lead-free perovskites-containing plasmas. Sci Rep 2022; 12:9128. [PMID: 35650247 PMCID: PMC9160093 DOI: 10.1038/s41598-022-13010-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 05/19/2022] [Indexed: 11/26/2022] Open
Abstract
High-order harmonics generation in the laser-induced plasmas produced on the surfaces of lead-free perovskites is studied. We analyze the harmonics generation in (CH3NH3)2CuCl4 and (CH3NH3)2CuBr4 plasmas during their ablation by the femtosecond, picosecond, and nanosecond pulses. The modifications of the high-order harmonics spectra are studied using the -color pump scheme (800 nm and 400 nm, 40 fs pulses). The influence of the variations of laser chirp and pulse duration on the dynamics of high-order harmonics generation is examined. The spectral shift, chirp-related harmonic cutoff scaling, and the role of the pulse duration of converting and heating laser radiation are examined at different conditions of plasma formation and harmonic generation. The dependencies of the pulse duration and the fluence of heating pulses on the harmonic’s blue shift are found. The effect of harmonics broadening and splitting on the two red- and blue-shifted components is demonstrated.
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Kim VV, Ganeev RA, Rao KS, Yu W, Li W. Analysis of laser plasma dynamics using the time resolved nonlinear optical response of ablated carbon nanocomposites mixed with epoxy resin. OPTICS EXPRESS 2021; 29:35877-35890. [PMID: 34809012 DOI: 10.1364/oe.438075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
Nonlinear optical properties of carbon nanostructures attract attention due to the unique response of these materials during interactions with ultrashort laser pulses. Here we probe the carbon nanocomposites mixed with epoxy resin in laser-induced plasmas using the high-order harmonics generation (HHG) method. We analyze the nanosecond pulses induced plasmas containing three carbon nanostructures (fullerenes, multiwalled carbon nanotubes and diamond nanoparticles) using 40 fs pulses propagating through these plasmas. HHG efficiencies in ablated graphite and nanocomposites are compared. We utilize two digitally synchronized (nanosecond and femtosecond) laser sources allowing for the HHG-based analysis of the evolution of different plasma plumes up to 10 µs delay from the beginning of ablation. The role of different carbon-containing nanocomposites is analyzed and the evidence for the presence of various nanomaterials in laser-induced plasma at the moment of propagation of the driving femtosecond pulses is demonstrated.
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Liang J, Lai YH, Fu W, Guo C, Li W. Distinguishing monomer and nanoparticle contributions to high-harmonic emission from laser-ablated plumes. OPTICS EXPRESS 2021; 29:23421-23429. [PMID: 34614607 DOI: 10.1364/oe.428652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/05/2021] [Indexed: 06/13/2023]
Abstract
Nano-clusters and nano-particles (NPs) are attractive media for high-harmonic generation (HHG) since they combine the advantages of using atomic media (for the low average density) and bulk solid media (for the high local density). Recently, laser ablated plumes from metal nano-powders have been used as HHG media and it has been often assumed that the harmonics mainly come from the NPs in the plumes but not by the isolated atoms/ions. However, this assumption is yet to be fully justified. Here, we show that in fact both NPs and isolated monomers could dominate the harmonic spectrum, depending on which part of the plume is interacting with the driving laser. From the ablated plume of indium NPs, it is found that the harmonic spectra from the region where monomers dominate are distinctively different from the region where NPs dominate. Our results demonstrate that accurately capturing the contribution of NPs in HHG processes requires precise selection of the laser-plasma interaction region, a factor that had not been carefully considered in previous studies.
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Reexamining Different Factors of the Resonance-Enhanced High-Order Harmonic Generation in Atomic and Nanoparticle Laser-Induced Tin Plasmas. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11052193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We reexamine the resonance enhancement of a single harmonic emission during the propagation of ultrafast pulses through atomic and nanoparticle tin-containing laser-induced plasma (LIP). We compare the single atomic Sn and Sn nanoparticle plasmas to demonstrate a distinction in the enhancement factor of the single harmonic in the case of fixed and tunable near-infrared pulses. The analysis of the dynamics of Sn LIP shows the range of optimal delays between heating and driving pulses (130–180 ns), at which the maximal harmonic yield can be achieved. The enhancements of the 17th and 18th harmonics of 806 nm pulses were analyzed in the case of single-color and two-color pumps of LIP, showing up to a 12-fold enhancement of even harmonics in the two-color pump case. We show the enhancement of a single harmonic in the vicinity of the 4d105s25p2P3/2→4d95s25p2 transitions of Sn II ions and demonstrate how this process depends on the constituency of the plasma components at different conditions of target ablation. The application of tunable (1280–1440 nm) radiation allows for demonstrating the variations of single harmonic enhancement using a two-color pump of Sn-containing LIP.
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Abstract
We demonstrate the variations of single harmonic resonance enhancement during high-order harmonics generation in zinc-containing atomic and molecular species at the conditions of single-color and two-color pumps of laser-induced plasmas by applying different laser sources. We show how selenides of this metal notably modify the enhancement of single (9th, 15th or 16th) harmonic compared with purely atomic zinc plasmas. The variations of single harmonic enhancement are demonstrated using fixed (806 nm) and tunable (1280–1440 nm) radiation.
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Sarantseva TS, Silaev AA, Romanov AA, Vvedenskii NV, Frolov MV. Time-frequency analysis of high harmonic generation using a probe XUV pulse. OPTICS EXPRESS 2021; 29:1428-1440. [PMID: 33726358 DOI: 10.1364/oe.413768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 12/18/2020] [Indexed: 06/12/2023]
Abstract
Interpretation of strong-field phenomena is mostly based on the analysis of classical electron trajectories in an intense laser field, whose specific properties determine general features of nonlinear laser-matter interaction. Currently, the visualization of closed electron trajectories contributing to high harmonic generation (HHG) of the laser field is the prerogative of a theoretical analysis based on the time-frequency spectrogram of the induced dipole acceleration. Here, we propose a method for direct reconstruction of the HHG time-frequency spectrogram using a time-delayed probe XUV pulse. Our analytical theory and ab initio numerical simulations demonstrate that the XUV-assisted HHG yield as a function of time delay and harmonic energy mimics the short-time Fourier transform of the dipole acceleration induced by the laser field, thereby providing possible in-situ experimental access for tracing electron dynamics in strong-field phenomena.
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Application of 150 kHz Laser for High-Order Harmonic Generation in Different Plasmas. PHOTONICS 2020. [DOI: 10.3390/photonics7030066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Application of high pulse repetition rate lasers opens the way for increasing the average flux of the high-order harmonics generating in the ions- and nanoparticles-containing plasmas ablated on the surfaces of various metal targets. We demonstrate the harmonic generation of 37 fs, 150 kHz, 1030 nm, 0.5 mJ pulses in different plasmas. The formation of plasma plumes on the surfaces of carbon, titanium, boron, zinc, and manganese targets was performed during laser ablation, using 250 fs pulses from the same laser. The ablation of the mixed powder of boron nanoparticles and silver microparticles was used for generation of harmonics with high yield. Harmonics up to the fortieth orders from the carbon plasma were obtained. The estimated conversion efficiencies in laser-produced plasmas were ≤10−5. The photon flux for a single harmonic generating in carbon plasma was estimated to be 8 × 1013 photons/s.
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Boltaev GS, Ganeev RA, Kim VV, Abbasi NA, Iqbal M, Alnaser AS. High-order harmonics generation in the plasmas produced on different rotating targets during ablation using 1 kHz and 100 kHz lasers. OPTICS EXPRESS 2020; 28:18859-18875. [PMID: 32672176 DOI: 10.1364/oe.393054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 06/04/2020] [Indexed: 06/11/2023]
Abstract
We analyze the high-order harmonics generation using 1 kHz and 100 kHz lasers by ablating different rotating targets. We demonstrate the high average flux of short-wavelength radiation using the latter laser, while comparing the plasma formation conditions at different pulse repetition rates. The analysis of harmonic stability in the case of the 100 kHz experiments showed the two-fold decay of the 27th harmonic generating in silver plasma after 3.5×106 shots. The advantages of shorter pulse-induced ablation for the improvement of harmonic generation stability are demonstrated. Two-color pump of plasma, resonance enhancement of single harmonic, and quasi-phase matching studies are presented for 1 kHz laser applications. The formation of modulated multi-jet plasma on the plane and curved surfaces during ablation by 100 kHz pulses is demonstrated. In the case of the 25th harmonic of 1030 nm radiation (E=30 eV) generated during experiments in carbon plasma, at 100 kHz and 40 W average power of driving pulses, 0.4 mW of average power for single harmonic in the 40 nm spectral range was achieved.
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Mofared M, Irani E, Sadighi-Bonabi R. Enhancing high harmonic generation by the global optimization of a two-color chirped laser field. Phys Chem Chem Phys 2019; 21:9302-9309. [PMID: 30993269 DOI: 10.1039/c8cp07619g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enhanced high harmonics are generated by local and global optimization approaches to achieve a supercontinuum spectrum. Based on time-dependent density functional theory calculations, the optimum convolution of a two-color chirped pulse from an N2O molecule implements a significant enhancement of cutoff frequency and high harmonic yield. The optimization is done by controlling the effective chirp parameters and the carrier-envelope phase of the designed laser field. Indeed, all of the effective parameters are adjusted simultaneously for the global optimization; whereas, just two variables are tuned to obtain the desired cutoff frequency based on the local optimization. The results show that the global optimization approach extends the cutoff frequency by 96% compared to the single-color field, which could produce an isolated 25 as output pulse. This method opens up a valuable route by a pulse shaping mechanism for the control of high harmonic generation and ultrafast measurements for reducing the computational time and repeatability of an experiment with high accuracy.
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Affiliation(s)
- Mohammad Mofared
- Department of Physics, Sharif University of Technology, P.O. Box 11365-9567, Tehran, Iran.
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Han JX, Wang J, Qiao Y, Liu AH, Guo FM, Yang YJ. Significantly enhanced conversion efficiency of high-order harmonic generation by introducing chirped laser pulses into scheme of spatially inhomogeneous field. OPTICS EXPRESS 2019; 27:8768-8776. [PMID: 31052689 DOI: 10.1364/oe.27.008768] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 02/21/2019] [Indexed: 06/09/2023]
Abstract
An effective scheme to enhance the yield of high-order harmonic generation originated from spatially inhomogeneous field through the interaction between few-cycle chirped laser pulses and a nano-tip structure is demonstrated. The conversion efficiency of harmonics from chirped laser pulses was significantly improved by nearly three more orders of magnitude than that of chirp-free pulses, and the cutoff energy of the corresponding harmonics was dramatically enhanced. By superimposing a series of properly selected orders of harmonics, isolated attosecond pulses of high intensity can be obtained. Furthermore, we compared the effects of different types of chirps on harmonics.
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