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  1. Article ; Online: Contrast enhancement in near-infrared electro-optic imaging.

    Mamaikin, Mikhail / Ridente, Enrico / Altwaijry, Najd / Weidman, Matthew / Karpowicz, Nicholas

    Optics express

    2022  Volume 30, Issue 11, Page(s) 18179–18188

    Abstract: Access to subtle ultrafast effects of light-matter interaction often requires highly sensitive field detection schemes. Electro-optic sampling, being an exemplary technique in this regard, lacks high sensitivity in an imaging geometry. We demonstrate a ... ...

    Abstract Access to subtle ultrafast effects of light-matter interaction often requires highly sensitive field detection schemes. Electro-optic sampling, being an exemplary technique in this regard, lacks high sensitivity in an imaging geometry. We demonstrate a straightforward method to significantly improve the contrast of electric field images in spatially resolved electro-optic sampling. A thin-film polarizer is shown to be an effective tool in enhancing the sensitivity of the electro-optic imaging system, enabling an adjustment of the spectral response. We show a further increase of the signal-to-noise ratio through the direct control of the carrier envelope phase of the imaged field.
    Language English
    Publishing date 2022-10-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.455413
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Femtosecond symmetry breaking and coherent relaxation of methane cations via x-ray spectroscopy.

    Ridente, Enrico / Hait, Diptarka / Haugen, Eric A / Ross, Andrew D / Neumark, Daniel M / Head-Gordon, Martin / Leone, Stephen R

    Science (New York, N.Y.)

    2023  Volume 380, Issue 6646, Page(s) 713–717

    Abstract: Understanding the relaxation pathways of photoexcited molecules is essential to gain atomistic-level insight into photochemistry. We performed a time-resolved study of ultrafast molecular symmetry breaking through geometric relaxation (Jahn-Teller ... ...

    Abstract Understanding the relaxation pathways of photoexcited molecules is essential to gain atomistic-level insight into photochemistry. We performed a time-resolved study of ultrafast molecular symmetry breaking through geometric relaxation (Jahn-Teller distortion) on the methane cation. Attosecond transient absorption spectroscopy with soft x-rays at the carbon K-edge revealed that the distortion occurred within 10 ± 2 femtoseconds after few-femtosecond strong-field ionization of methane. The distortion activated coherent oscillations in the asymmetric scissoring vibrational mode of the symmetry-broken cation, which were detected in the x-ray signal. These oscillations were damped within 58 ± 13 femtoseconds because vibrational coherence was lost with the energy redistributing into lower-frequency vibrational modes. This study completely reconstructs the molecular relaxation dynamics of this prototypical example and opens avenues for exploring complex systems.
    Language English
    Publishing date 2023-05-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.adg4421
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Electro-optic characterization of synthesized infrared-visible light fields.

    Ridente, Enrico / Mamaikin, Mikhail / Altwaijry, Najd / Zimin, Dmitry / Kling, Matthias F / Pervak, Vladimir / Weidman, Matthew / Krausz, Ferenc / Karpowicz, Nicholas

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 1111

    Abstract: The measurement and control of light field oscillations enable the study of ultrafast phenomena on sub-cycle time scales. Electro-optic sampling (EOS) is a powerful field characterization approach, in terms of both sensitivity and dynamic range, but it ... ...

    Abstract The measurement and control of light field oscillations enable the study of ultrafast phenomena on sub-cycle time scales. Electro-optic sampling (EOS) is a powerful field characterization approach, in terms of both sensitivity and dynamic range, but it has not reached beyond infrared frequencies. Here, we show the synthesis of a sub-cycle infrared-visible pulse and subsequent complete electric field characterization using EOS. The sampled bandwidth spans from 700 nm to 2700 nm (428 to 110 THz). Tailored electric-field waveforms are generated with a two-channel field synthesizer in the infrared-visible range, with a full-width at half-maximum duration as short as 3.8 fs at a central wavelength of 1.7 µm (176 THz). EOS detection of the complete bandwidth of these waveforms extends it into the visible spectral range. To demonstrate the power of our approach, we use the sub-cycle transients to inject carriers in a thin quartz sample for nonlinear photoconductive field sampling with sub-femtosecond resolution.
    Language English
    Publishing date 2022-03-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-28699-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Jahn-Teller distortion and dissociation of CCl

    Ross, Andrew D / Hait, Diptarka / Scutelnic, Valeriu / Haugen, Eric A / Ridente, Enrico / Balkew, Mikias B / Neumark, Daniel M / Head-Gordon, Martin / Leone, Stephen R

    Chemical science

    2022  Volume 13, Issue 32, Page(s) 9310–9320

    Abstract: X-ray Transient Absorption Spectroscopy (XTAS) and theoretical calculations are used to study ... ...

    Abstract X-ray Transient Absorption Spectroscopy (XTAS) and theoretical calculations are used to study CCl
    Language English
    Publishing date 2022-07-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 2559110-1
    ISSN 2041-6539 ; 2041-6520
    ISSN (online) 2041-6539
    ISSN 2041-6520
    DOI 10.1039/d2sc02402k
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Correction: Jahn-Teller distortion and dissociation of CCl

    Ross, Andrew D / Hait, Diptarka / Scutelnic, Valeriu / Haugen, Eric A / Ridente, Enrico / Balkew, Mikias B / Neumark, Daniel M / Head-Gordon, Martin / Leone, Stephen R

    Chemical science

    2022  Volume 13, Issue 35, Page(s) 10581

    Abstract: This corrects the article DOI: 10.1039/D2SC02402K.]. ...

    Abstract [This corrects the article DOI: 10.1039/D2SC02402K.].
    Language English
    Publishing date 2022-08-24
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2559110-1
    ISSN 2041-6539 ; 2041-6520
    ISSN (online) 2041-6539
    ISSN 2041-6520
    DOI 10.1039/d2sc90172b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Temporally Resolved Intensity Contouring (TRIC) for characterization of the absolute spatio-temporal intensity distribution of a relativistic, femtosecond laser pulse.

    Haffa, Daniel / Bin, Jianhui / Speicher, Martin / Allinger, Klaus / Hartmann, Jens / Kreuzer, Christian / Ridente, Enrico / Ostermayr, Tobias M / Schreiber, Jörg

    Scientific reports

    2019  Volume 9, Issue 1, Page(s) 7697

    Abstract: Today's high-power laser systems are capable of reaching photon intensities up to ... ...

    Abstract Today's high-power laser systems are capable of reaching photon intensities up to 10
    Language English
    Publishing date 2019-05-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-019-42683-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: I-BEAT: Ultrasonic method for online measurement of the energy distribution of a single ion bunch.

    Haffa, Daniel / Yang, Rong / Bin, Jianhui / Lehrack, Sebastian / Brack, Florian-Emanuel / Ding, Hao / Englbrecht, Franz S / Gao, Ying / Gebhard, Johannes / Gilljohann, Max / Götzfried, Johannes / Hartmann, Jens / Herr, Sebastian / Hilz, Peter / Kraft, Stephan D / Kreuzer, Christian / Kroll, Florian / Lindner, Florian H / Metzkes-Ng, Josefine /
    Ostermayr, Tobias M / Ridente, Enrico / Rösch, Thomas F / Schilling, Gregor / Schlenvoigt, Hans-Peter / Speicher, Martin / Taray, Derya / Würl, Matthias / Zeil, Karl / Schramm, Ulrich / Karsch, Stefan / Parodi, Katia / Bolton, Paul R / Assmann, Walter / Schreiber, Jörg

    Scientific reports

    2019  Volume 9, Issue 1, Page(s) 6714

    Abstract: The shape of a wave carries all information about the spatial and temporal structure of its source, given that the medium and its properties are known. Most modern imaging methods seek to utilize this nature of waves originating from Huygens' principle. ... ...

    Abstract The shape of a wave carries all information about the spatial and temporal structure of its source, given that the medium and its properties are known. Most modern imaging methods seek to utilize this nature of waves originating from Huygens' principle. We discuss the retrieval of the complete kinetic energy distribution from the acoustic trace that is recorded when a short ion bunch deposits its energy in water. This novel method, which we refer to as Ion-Bunch Energy Acoustic Tracing (I-BEAT), is a refinement of the ionoacoustic approach. With its capability of completely monitoring a single, focused proton bunch with prompt readout and high repetition rate, I-BEAT is a promising approach to meet future requirements of experiments and applications in the field of laser-based ion acceleration. We demonstrate its functionality at two laser-driven ion sources for quantitative online determination of the kinetic energy distribution in the focus of single proton bunches.
    Language English
    Publishing date 2019-04-30
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-019-42920-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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