Volkov transform generalized projection algorithm for attosecond pulse characterization

Keathley, Phillip D.; Bhardwaj, S. B.; Moses, Jeffrey; Laurent, Guillaume; Kärtner, Franz X.

doi:10.1088/1367-2630/18/7/073009

Cited by 67 publications

(48 citation statements)

References 24 publications

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“…In fact, the chirp modifies the spectrogram features in such a way that the FROG-CRAB algorithms based on the central momentum approximation (CMA) cannot correctly retrieve the spectral phase. Most recently, Keathley et al 7 published an algorithm, which does not rely on the CMA and could therefore overcome this limitation.…”

mentioning

confidence: 99%

Comparison of attosecond streaking and RABBITT

et al. 2016

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confidence: 99%

Comparison of attosecond streaking and RABBITT

et al. 2016

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“…In their work, they were unable to overcome these limitations to fully recover the phase of the photoelectron wavepacket. While others have shown the ability to circumvent the central-momentum approximation [23], to our knowledge the wavepacket approximation remains the limiting factor in accurate photoelectron retrieval. In the following sections, we define the wavepacket approximation and demonstrate why it is so problematic.…”

Section: Xuv Phase Retrieval Techniques For Photoelectron Wavepacket mentioning

confidence: 99%

Complete phase retrieval of photoelectron wavepackets

et al. 2020

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Coherent, broadband pulses of extreme ultraviolet (XUV) light provide a new and exciting tool for exploring attosecond electron dynamics. Using photoelectron streaking, interferometric spectrograms can be generated that contain a wealth of information about the phase properties of the photoionization process. If properly retrieved, this phase information reveals attosecond dynamics during photoelectron emission such as multielectron dynamics and resonance processes. However, until now, the full retrieval of the continuous electron wavepacket phase from isolated attosecond pulses has remained challenging. Here, after elucidating key approximations and limitations that hinder one from extracting the coherent electron wavepacket dynamics using available retrieval algorithms, we present a new method called Absolute Complex Dipole transmission matrix element reConstruction (ACDC). We apply the ACDC method to experimental spectrograms to resolve the phase and group delay difference between photoelectrons emitted from Ne and Ar. Our results reveal subtle dynamics in this group delay difference of photoelectrons emitted form Ar. These group delay dynamics were not resolvable with prior methods that were only able to extract phase information at discrete energy levels, emphasizing the importance of a complete and continuous phase retrieval technique such as ACDC. Here we also make this new ACDC retrieval algorithm available with appropriate citation in return.

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“…Nowadays, the tool box for the characterization of asec pulses is quite rich. To our knowledge, it contains approaches like 2-IVAC [45,47,159], XUV-IR cross-correlation named RABBITT (applicable for asec pulse trains) [146], Streaking (applicable for isolated asec pulses) [160], FROG-CRAB (applicable for arbitrary asec fields) [161], PROOF (applicable for asec pulses with bandwidth >70 eV) [162,163], Terahertz streaking (applicable for FEL sources) [164], XUV-SPIDER [165,166], and in-situ cross-correlation [167].…”

Section: Characterization Of Xuv Sourcesmentioning

confidence: 99%

Generation of Attosecond Light Pulses from Gas and Solid State Media

et al. 2017

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Real-time observation of ultrafast dynamics in the microcosm is a fundamental approach for understanding the internal evolution of physical, chemical and biological systems. Tools for tracing such dynamics are flashes of light with duration comparable to or shorter than the characteristic evolution times of the system under investigation. While femtosecond (fs) pulses are successfully used to investigate vibrational dynamics in molecular systems, real time observation of electron motion in all states of matter requires temporal resolution in the attosecond (1 attosecond (asec) = 10 −18 s) time scale. During the last decades, continuous efforts in ultra-short pulse engineering led to the development of table-top sources which can produce asec pulses. These pulses have been synthesized by using broadband coherent radiation in the extreme ultraviolet (XUV) spectral region generated by the interaction of matter with intense fs pulses. Here, we will review asec pulses generated by the interaction of gas phase media and solid surfaces with intense fs IR laser fields. After a brief overview of the fundamental process underlying the XUV emission form these media, we will review the current technology, specifications and the ongoing developments of such asec sources.

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Volkov transform generalized projection algorithm for attosecond pulse characterization

Cited by 67 publications

References 24 publications

Comparison of attosecond streaking and RABBITT

Comparison of attosecond streaking and RABBITT

Complete phase retrieval of photoelectron wavepackets

Generation of Attosecond Light Pulses from Gas and Solid State Media

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