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Mével E, Shutter JA, Ding X, Mattingly BT, Williams JN, Li Y, Huls A, Kambrath AV, Trippel SB, Wagner D, Allen MR, O'Keefe R, Thompson WR, Burr DB, Sankar U. Systemic inhibition or global deletion of CaMKK2 protects against post-traumatic osteoarthritis. Osteoarthritis Cartilage 2022; 30:124-136. [PMID: 34506942 PMCID: PMC8712369 DOI: 10.1016/j.joca.2021.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 08/17/2021] [Accepted: 09/01/2021] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate the role of Ca2+/calmodulin-dependent protein kinase 2 (CaMKK2) in post-traumatic osteoarthritis (PTOA). METHODS Destabilization of the medial meniscus (DMM) or sham surgeries were performed on 10-week-old male wild-type (WT) and Camkk2-/- mice. Half of the DMM-WT mice and all other cohorts (n = 6/group) received tri-weekly intraperitoneal (i.p.) injections of saline whereas the remaining DMM-WT mice (n = 6/group) received i.p. injections of the CaMKK2 inhibitor STO-609 (0.033 mg/kg body weight) thrice a week. Study was terminated at 8- or 12-weeks post-surgery, and knee joints processed for microcomputed tomography imaging followed by histology and immunohistochemistry. Primary articular chondrocytes were isolated from knee joints of 4-6-day-old WT and Camkk2-/- mice, and treated with 10 ng/ml interleukin-1β (IL)-1β for 24 or 48 h to investigate gene and protein expression. RESULTS CaMKK2 levels and activity became elevated in articular chondrocytes following IL-1β treatment or DMM surgery. Inhibition or absence of CaMKK2 protected against DMM-associated destruction of the cartilage, subchondral bone alterations and synovial inflammation. When challenged with IL-1β, chondrocytes lacking CaMKK2 displayed attenuated inflammation, cartilage catabolism, and resistance to suppression of matrix synthesis. IL-1β-treated CaMKK2-null chondrocytes displayed decreased IL-6 production, activation of signal transducer and activator of transcription 3 (Stat3) and matrix metalloproteinase 13 (MMP13), indicating a potential mechanism for the regulation of inflammatory responses in chondrocytes by CaMKK2. CONCLUSIONS Our findings reveal a novel function for CaMKK2 in chondrocytes and highlight the potential for its inhibition as an innovative therapeutic strategy in the prevention of PTOA.
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Affiliation(s)
- E Mével
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - J A Shutter
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - X Ding
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - B T Mattingly
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - J N Williams
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - Y Li
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - A Huls
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - A V Kambrath
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - S B Trippel
- Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - D Wagner
- Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Department of Mechanical and Energy Engineering, School of Engineering and Technology, Indianapolis, IN, 46202, USA.
| | - M R Allen
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - R O'Keefe
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - W R Thompson
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Department of Physical Therapy, School of Health and Rehabilitation Sciences, Indianapolis, IN, 46202, USA.
| | - D B Burr
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - U Sankar
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA; Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
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2
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Veyrinas K, Vábek J, Valentin C, Descamps D, Péjot C, Burgy F, Constant E, Mével E, Catoire F. Spectral filtering of high-order harmonics via optics-free focusing. Opt Express 2021; 29:29813-29827. [PMID: 34614719 DOI: 10.1364/oe.436086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 08/20/2021] [Indexed: 06/13/2023]
Abstract
Controlling the wavefront of an extreme ultraviolet (XUV) high-order harmonic beam during the generation process offers the capability of modifying the beam properties without resorting to any XUV optics. By characterizing the XUV intensity profile and wavefront, we quantitatively retrieve both the size and the position of the waist of each harmonic generated in an argon jet. We show that optics-free focusing can occur under specific generating conditions leading to XUV focii of micrometer size. We also demonstrate that each focus is located at distinct longitudinal positions. Using this remarkable XUV wavefront control combined with near focus spatial selection, we experimentally demonstrate efficient and adjustable spectral filtering of the XUV beam, along with a strong rejection of the fundamental beam, without using any XUV optics. The experimental results are compared with simulations providing the impact of the filtering on the temporal profile of the XUV field. It shows that the attosecond structure is preserved and that the beam is more homogeneous after the filtering, thereby reducing the longitudinal focii shift. This is a major step to achieve high XUV intensity and probing ultrafast processes with an improved resolution.
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3
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Hort O, Dubrouil A, Khokhlova MA, Descamps D, Petit S, Burgy F, Mével E, Constant E, Strelkov VV. High-order parametric generation of coherent XUV radiation. Opt Express 2021; 29:5982-5992. [PMID: 33726129 DOI: 10.1364/oe.418449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Extreme ultraviolet (XUV) radiation finds numerous applications in spectroscopy. When the XUV light is generated via high-order harmonic generation (HHG), it may be produced in the form of attosecond pulses, allowing access to unprecedented ultrafast phenomena. However, the HHG efficiency remains limited. Here we present an observation of a new regime of coherent XUV emission which has a potential to provide higher XUV intensity, vital for applications. We explain the process by high-order parametric generation, involving the combined emission of THz and XUV photons, where the phase matching is very robust against ionization. This introduces a way to use higher-energy driving pulses, thus generating more XUV photons.
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Quintard L, Strelkov V, Vabek J, Hort O, Dubrouil A, Descamps D, Burgy F, Péjot C, Mével E, Catoire F, Constant E. Optics-less focusing of XUV high-order harmonics. Sci Adv 2019; 5:eaau7175. [PMID: 30972360 PMCID: PMC6450687 DOI: 10.1126/sciadv.aau7175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 02/12/2019] [Indexed: 05/23/2023]
Abstract
By experimentally studying high-order harmonic beams generated in gases, we show how the spatial characteristics of these ultrashort extreme-ultraviolet (XUV) beams can be finely controlled when a single fundamental beam generates harmonics in a thin gas medium. We demonstrate that these XUV beams can be emitted as converging beams and thereby get focused after generation. We study this optics-less focusing using a spatially chirped beam that acts as a probe located inside the harmonic generation medium. We analyze the XUV beam evolution with an analytical model and obtain very good agreement with experimental measurements. The XUV foci sizes and positions vary strongly with the harmonic order, and the XUV waist can be located at arbitrarily large distances from the generating medium. We discuss how intense XUV fields can be obtained with optics-less focusing and how the order-dependent XUV beam characteristics are compatible with broadband XUV irradiation and attosecond science.
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Affiliation(s)
- L. Quintard
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
| | - V. Strelkov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilova Street, Moscow 119991, Russia
- Moscow Institute of Physics and Technology (State University), 141700 Dolgoprudny, Moscow Region, Russia
| | - J. Vabek
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
| | - O. Hort
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
| | - A. Dubrouil
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
| | - D. Descamps
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
| | - F. Burgy
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
| | - C. Péjot
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
| | - E. Mével
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
| | - F. Catoire
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
| | - E. Constant
- Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière (ILM), 69622 Villeurbanne, France
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5
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Ferré A, Soifer H, Pedatzur O, Bourassin-Bouchet C, Bruner BD, Canonge R, Catoire F, Descamps D, Fabre B, Mével E, Petit S, Dudovich N, Mairesse Y. Two-Dimensional Frequency Resolved Optomolecular Gating of High-Order Harmonic Generation. Phys Rev Lett 2016; 116:053002. [PMID: 26894708 DOI: 10.1103/physrevlett.116.053002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Indexed: 06/05/2023]
Abstract
Probing electronic wave functions of polyatomic molecules is one of the major challenges in high-harmonic spectroscopy. The extremely nonlinear nature of the laser-molecule interaction couples the multiple degrees of freedom of the probed system. We combine two-dimensional control of the electron trajectories and vibrational control of the molecules to disentangle the two main steps in high-harmonic generation-ionization and recombination. We introduce a new measurement scheme, frequency-resolved optomolecular gating, which resolves the temporal amplitude and phase of the harmonic emission from excited molecules. Focusing on the study of vibrational motion in N_{2}O_{4}, we show that such advanced schemes provide a unique insight into the structural and dynamical properties of the underlying mechanism.
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Affiliation(s)
- A Ferré
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France
| | - H Soifer
- Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel
| | - O Pedatzur
- Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel
| | | | - B D Bruner
- Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel
| | - R Canonge
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France
| | - F Catoire
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France
| | - D Descamps
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France
| | - B Fabre
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France
| | - E Mével
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France
| | - S Petit
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France
| | - N Dudovich
- Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Y Mairesse
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F33405 Talence, France
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6
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Dubrouil A, Hort O, Catoire F, Descamps D, Petit S, Mével E, Strelkov VV, Constant E. Spatio–spectral structures in high-order harmonic beams generated with Terawatt 10-fs pulses. Nat Commun 2014; 5:4637. [DOI: 10.1038/ncomms5637] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 07/09/2014] [Indexed: 11/09/2022] Open
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7
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Strelkov VV, Mével E, Constant E. Short pulse carrier-envelope phase absolute single-shot measurement by photoionization of gases with a guided laser beam. Opt Express 2014; 22:6239-6248. [PMID: 24663972 DOI: 10.1364/oe.22.006239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present an all optical approach to measure the value of the carrier-envelope phase (CEP) of a short intense laser pulse. This method relies on photo-ionization of gases with a guided laser beam. This approach that provides the absolute value of the CEP, is compatible with single shot characterization, is scalable in wavelength, does not suffer from bandwidth limitation and is largely intensity independent. It has also the potential to provide a full characterization of the pulse profile via high order autocorrelation on a single shot basis.
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8
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Hort O, Dubrouil A, Fourcade-Dutin C, Petit S, Mével E, Descamps D, Constant E. Terawatt Post compression of high energy fs pulses using ionization: A way to overcome the conventional limitation in energy of few optical cycle pulses. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134110021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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9
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Ruf H, Handschin C, Cireasa R, Thiré N, Ferré A, Petit S, Descamps D, Mével E, Constant E, Blanchet V, Fabre B, Mairesse Y. Inhomogeneous high harmonic generation in krypton clusters. Phys Rev Lett 2013; 110:083902. [PMID: 23473148 DOI: 10.1103/physrevlett.110.083902] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 12/21/2012] [Indexed: 06/01/2023]
Abstract
High order harmonic generation from clusters is a controversial topic: conflicting theories exist, with different explanations for similar experimental observations. From an experimental point of view, separating the contributions from monomers and clusters is challenging. By performing a spectrally and spatially resolved study in a controlled mixture of clusters and monomers, we are able to isolate a region of the spectrum where the emission purely originates from clusters. Surprisingly, the emission from clusters is depolarized, which is the signature of statistical inhomogeneous emission from a low-density source. The harmonic response to laser ellipticity shows that this generation is produced by a new recollisional mechanism, which opens the way to future theoretical studies.
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Affiliation(s)
- H Ruf
- CELIA, Université de Bordeaux-CNRS-CEA, UMR5107, F33405 Talence, France
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10
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Ruf H, Handschin C, Ferré A, Thiré N, Bertrand JB, Bonnet L, Cireasa R, Constant E, Corkum PB, Descamps D, Fabre B, Larregaray P, Mével E, Petit S, Pons B, Staedter D, Wörner HJ, Villeneuve DM, Mairesse Y, Halvick P, Blanchet V. High-harmonic transient grating spectroscopy of NO2 electronic relaxation. J Chem Phys 2012; 137:224303. [DOI: 10.1063/1.4768810] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- H Ruf
- Université de Bordeaux-CNRS-CEA, CELIA, UMR5107, F-33400 Talence, France
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11
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Shafir D, Fabre B, Higuet J, Soifer H, Dagan M, Descamps D, Mével E, Petit S, Wörner HJ, Pons B, Dudovich N, Mairesse Y. Role of the ionic potential in high harmonic generation. Phys Rev Lett 2012; 108:203001. [PMID: 23003145 DOI: 10.1103/physrevlett.108.203001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Indexed: 06/01/2023]
Abstract
Recollision processes provide direct insight into the structure and dynamics of electronic wave functions. However, the strength of the process sets its basic limitations--the interaction couples numerous degrees of freedom. In this Letter we decouple the basic steps of the process and resolve the role of the ionic potential which is at the heart of a broad range of strong field phenomena. Specifically, we measure high harmonic generation from argon atoms. By manipulating the polarization of the laser field we resolve the vectorial properties of the interaction. Our study shows that the ionic core plays a significant role in all steps of the interaction. In particular, Coulomb focusing induces an angular deflection of the electrons before recombination. A complete spatiospectral analysis reveals the influence of the potential on the spatiotemporal properties of the emitted light.
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Affiliation(s)
- D Shafir
- Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel
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12
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Wörner HJ, Bertrand JB, Fabre B, Higuet J, Ruf H, Dubrouil A, Patchkovskii S, Spanner M, Mairesse Y, Blanchet V, Mével E, Constant E, Corkum PB, Villeneuve DM. Conical Intersection Dynamics in NO
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Probed by Homodyne High-Harmonic Spectroscopy. Science 2011; 334:208-12. [DOI: 10.1126/science.1208664] [Citation(s) in RCA: 201] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- H. J. Wörner
- Joint Laboratory for Attosecond Science, National Research Council of Canada and University of Ottawa, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
- Laboratorium für Physikalische Chemie, Eidgenössische Technische Hochschule Zürich, Wolfgang-Pauli-Strasse 10, 8093 Zürich, Switzerland
| | - J. B. Bertrand
- Joint Laboratory for Attosecond Science, National Research Council of Canada and University of Ottawa, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
| | - B. Fabre
- Centre Lasers Intenses et Applications, Université de Bordeaux, CEA, CNRS, UMR5107, 351 Cours de la Libération, 33405 Talence, France
| | - J. Higuet
- Centre Lasers Intenses et Applications, Université de Bordeaux, CEA, CNRS, UMR5107, 351 Cours de la Libération, 33405 Talence, France
| | - H. Ruf
- Centre Lasers Intenses et Applications, Université de Bordeaux, CEA, CNRS, UMR5107, 351 Cours de la Libération, 33405 Talence, France
| | - A. Dubrouil
- Centre Lasers Intenses et Applications, Université de Bordeaux, CEA, CNRS, UMR5107, 351 Cours de la Libération, 33405 Talence, France
| | - S. Patchkovskii
- Joint Laboratory for Attosecond Science, National Research Council of Canada and University of Ottawa, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
| | - M. Spanner
- Joint Laboratory for Attosecond Science, National Research Council of Canada and University of Ottawa, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
| | - Y. Mairesse
- Centre Lasers Intenses et Applications, Université de Bordeaux, CEA, CNRS, UMR5107, 351 Cours de la Libération, 33405 Talence, France
| | - V. Blanchet
- Laboratoire Collisions Agrégats Réactivité (IRSAMC), UPS, Université de Toulouse, F-31062 Toulouse, France and CNRS, UMR 5589, F-31062 Toulouse, France
| | - E. Mével
- Centre Lasers Intenses et Applications, Université de Bordeaux, CEA, CNRS, UMR5107, 351 Cours de la Libération, 33405 Talence, France
| | - E. Constant
- Centre Lasers Intenses et Applications, Université de Bordeaux, CEA, CNRS, UMR5107, 351 Cours de la Libération, 33405 Talence, France
| | - P. B. Corkum
- Joint Laboratory for Attosecond Science, National Research Council of Canada and University of Ottawa, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
| | - D. M. Villeneuve
- Joint Laboratory for Attosecond Science, National Research Council of Canada and University of Ottawa, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
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Loch RA, Dubrouil A, Sobierajski R, Descamps D, Fabre B, Lidon P, van de Kruijs RWE, Boekhout F, Gullikson E, Gaudin J, Louis E, Bijkerk F, Mével E, Petit S, Constant E, Mairesse Y. Phase characterization of the reflection on an extreme UV multilayer: comparison between attosecond metrology and standing wave measurements. Opt Lett 2011; 36:3386-3388. [PMID: 21886219 DOI: 10.1364/ol.36.003386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We characterize the phase shift induced by reflection on a multilayer mirror in the extreme UV range (80-93 eV) using two techniques: one based on high order harmonic generation and attosecond metrology (reconstruction of attosecond beating by interference of two-photon transitions), and a second based on synchrotron radiation and measurements of standing waves (total electron yield). We find an excellent agreement between the results from the two measurements and a flat group delay shift (±40 as) over the main reflectivity peak of the mirror.
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Affiliation(s)
- R A Loch
- FOM Institute for Plasma Physics Rijnhuizen, Nieuwegein, The Netherlands.
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14
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Dubrouil A, Mairesse Y, Fabre B, Descamps D, Petit S, Mével E, Constant E. Controlling high harmonics generation by spatial shaping of high-energy femtosecond beam. Opt Lett 2011; 36:2486-2488. [PMID: 21725453 DOI: 10.1364/ol.36.002486] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We demonstrate controlled high-order harmonic generation in gas using high-energy femtosecond pulses (50 fs-50 mJ on target) by performing spatial shaping of the terrawatt fundamental laser beam. We have developed a two optical paths mirror that can withstand high power and shape the pump beam into a quasi-flat-top profile (super Gaussian) near focus. We observe clear signatures of the spatial shaping on the harmonic beam in terms of profile, divergence, level of signal, and spectrum. The harmonic generation in neon with a quasi-flat-top beam results in a broadband extreme UV beam with extremely low divergence (~340 μrad).
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Affiliation(s)
- A Dubrouil
- Centre Lasers Intenses et Applications, Université de Bordeaux-CNRS-CEA, 351, cours de la Libération, 33405 Talence Cedex, France. ‐bordeaux1.fr
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15
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Mairesse Y, Higuet J, Dudovich N, Shafir D, Fabre B, Mével E, Constant E, Patchkovskii S, Walters Z, Ivanov MY, Smirnova O. High harmonic spectroscopy of multichannel dynamics in strong-field ionization. Phys Rev Lett 2010; 104:213601. [PMID: 20867095 DOI: 10.1103/physrevlett.104.213601] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Indexed: 05/29/2023]
Abstract
We perform high harmonic generation spectroscopy of aligned nitrogen molecules to characterize the attosecond dynamics of multielectron rearrangement during strong-field ionization. We use the spectrum and ellipticity of the harmonic light to reconstruct the relative phase between different ionization continua participating in the ionization, and thus determine the shape and location of the hole left in the molecule by strong-field ionization. Our interferometric technique uses transitions between the ionic states, induced by the laser field on the subcycle time scale.
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Affiliation(s)
- Y Mairesse
- CELIA, Université Bordeaux 1, UMR5107 (CNRS, Bordeaux 1, CEA), 351 Cours de la Libération, 33405 Talence, France
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Dutin CF, Dubrouil A, Petit S, Mével E, Constant E, Descamps D. Post-compression of high-energy femtosecond pulses using gas ionization. Opt Lett 2010; 35:253-255. [PMID: 20081985 DOI: 10.1364/ol.35.000253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We present a new optical post-compression technique designed for high-energy ultrashort pulses. A large spectral broadening is achieved through rapid ionization of helium by an intense pulse (>10(15) W/cm(2)) propagating in a capillary filled with low-pressure helium. The blueshifted pulses are re-compressed with chirped mirrors and silica plates. From a terawatt Ti:sapphire laser chain providing pulses of 40 fs, 70 mJ, we demonstrate the compression of pulses down to 11.4 fs (FWHM) with a total output energy of 13.7 mJ.
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Affiliation(s)
- C Fourcade Dutin
- Centre Lasers Intenses et Applications, Université de Bordeaux-CNRS-CEA, 351, cours de la Libération,33105 Talence Cedex, France
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Constant E, Mével E, Zaïr A, Bagnoud V, Salin F. Toward sub-femtosecond pump-probe experiments : A dispersionless autocorrelator with attosecond resolution. ACTA ACUST UNITED AC 2001. [DOI: 10.1051/jp4:20012105] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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