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Ivan P. Christov
Researcher at Sofia University
Publications - 136
Citations - 5991
Ivan P. Christov is an academic researcher from Sofia University. The author has contributed to research in topics: High harmonic generation & Ultrashort pulse. The author has an hindex of 35, co-authored 134 publications receiving 5745 citations. Previous affiliations of Ivan P. Christov include Max Planck Society & Washington State University.
Papers
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Shaped-pulse optimization of coherent emission of high-harmonic soft X-rays
Randy A. Bartels,Sterling Backus,E. Zeek,Lino Misoguti,Gleb Vdovin,Ivan P. Christov,Margaret M. Murnane,Henry C. Kapteyn +7 more
TL;DR: By carefully tailoring the shape of intense light pulses, this work can control the interaction of light with an atom during ionization, improving the efficiency of X-ray generation by an order of magnitude.
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High-Harmonic Generation of Attosecond Pulses in the “Single-Cycle” Regime
TL;DR: In this article, a 3D model for high-harmonic generation with excitation pulses shorter than 25fs was proposed, where the temporal coherence of adjacent harmonic orders was improved compared with longer excitation pulse.
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Generation of spatially coherent light at extreme ultraviolet wavelengths.
Randy A. Bartels,Ariel Paul,Hans Green,Henry C. Kapteyn,Margaret M. Murnane,Sterling Backus,Ivan P. Christov,Yanwei Liu,Yanwei Liu,David Attwood,David Attwood,Chris Jacobsen +11 more
TL;DR: This work demonstrates the capability to perform EUV holography with a tabletop experimental setup and presents spatial coherence measurements of extreme ultraviolet (EUV) light generated through the process of high-harmonic up-conversion of a femtosecond laser.
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Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum
Tenio Popmintchev,Ming-Chang Chen,Alon Bahabad,Michael Gerrity,Pavel Sidorenko,Oren Cohen,Ivan P. Christov,Margaret M. Murnane,Henry C. Kapteyn +8 more
TL;DR: The rapidly decreasing microscopic single-atom yield, predicted for harmonics driven by longer-wavelength lasers, is compensated macroscopically by an increased optimal pressure for phase matching and a rapidly decreasing reabsorption of the generated X-rays, making tabletop, fully coherent, multi-keV X-ray sources feasible.
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Coherent Soft X-ray Generation in the Water Window with Quasi-Phase Matching
Emily A. Gibson,Ariel Paul,Nicholas L. Wagner,Ra'anan Tobey,David M. Gaudiosi,Sterling Backus,Ivan P. Christov,Andrew Aquila,Eric M. Gullikson,David Attwood,David Attwood,Margaret M. Murnane,Henry C. Kapteyn +12 more
TL;DR: Enhanced generation of coherent light in the “water window” region of the soft x-ray spectrum at 4.4 nanometers is demonstrated, using quasi–phase-matched frequency conversion of ultrafast laser pulses to use neon gas as the nonlinear medium to coherently convert light up to the water window.