The Experts below are selected from a list of 1512 Experts worldwide ranked by ideXlab platform
Daniel M Neumark - One of the best experts on this subject based on the ideXlab platform.
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near resonant four wave mixing of attosecond extreme ultraviolet pulses with near infrared pulses in Neon detection of electronic coherences
Physical Review A, 2016Co-Authors: Wei Cao, Erika R Warrick, Ashley P Fidler, Stephen R Leone, Daniel M NeumarkAbstract:Coherent narrow-band extreme-ultraviolet (EUV) light is generated by a near-resonant four-wave mixing (FWM) process between attosecond pulse trains and near-infrared pulses in Neon gas. The near-resonant FWM process involves one vacuum-ultraviolet (VUV) photon and two near-infrared (NIR) photons and produces new higher-energy frequency components corresponding to the $ns/nd$ to ground-state $(2{s}^{2}2{p}^{6})$ transitions in the Neon Atom. The EUV emission exhibits small angular divergence (2 mrad) and monotonically increasing intensity over a pressure range of 0.5--16 Torr, suggesting phase matching in the production of the narrow-bandwidth coherent EUV light. In addition, time-resolved scans of the NIR nonlinear mixing process reveal the detection of a persistent, ultrafast bound electronic wave packet based on a coherent superposition initiated by the VUV pulse in the Neon Atoms. This FWM process using attosecond pulses offers a means for both efficient narrow-band EUV source generation and time-resolved investigations of ultrafast dynamics.
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near resonant four wave mixing of attosecond extreme ultraviolet pulses with near infrared pulses in Neon detection of electronic coherences
Physical Review A, 2016Co-Authors: Wei Cao, Erika R Warrick, Ashley P Fidler, Daniel M Neumark, S LeoneAbstract:Author(s): Cao, W; Warrick, ER; Fidler, A; Leone, SR; Neumark, DM | Abstract: © 2016 American Physical Society. Coherent narrow-band extreme-ultraviolet (EUV) light is generated by a near-resonant four-wave mixing (FWM) process between attosecond pulse trains and near-infrared pulses in Neon gas. The near-resonant FWM process involves one vacuum-ultraviolet (VUV) photon and two near-infrared (NIR) photons and produces new higher-energy frequency components corresponding to the ns/nd to ground-state (2s22p6) transitions in the Neon Atom. The EUV emission exhibits small angular divergence (2 mrad) and monotonically increasing intensity over a pressure range of 0.5-16 Torr, suggesting phase matching in the production of the narrow-bandwidth coherent EUV light. In addition, time-resolved scans of the NIR nonlinear mixing process reveal the detection of a persistent, ultrafast bound electronic wave packet based on a coherent superposition initiated by the VUV pulse in the Neon Atoms. This FWM process using attosecond pulses offers a means for both efficient narrow-band EUV source generation and time-resolved investigations of ultrafast dynamics.
Wei Cao - One of the best experts on this subject based on the ideXlab platform.
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near resonant four wave mixing of attosecond extreme ultraviolet pulses with near infrared pulses in Neon detection of electronic coherences
Physical Review A, 2016Co-Authors: Wei Cao, Erika R Warrick, Ashley P Fidler, Stephen R Leone, Daniel M NeumarkAbstract:Coherent narrow-band extreme-ultraviolet (EUV) light is generated by a near-resonant four-wave mixing (FWM) process between attosecond pulse trains and near-infrared pulses in Neon gas. The near-resonant FWM process involves one vacuum-ultraviolet (VUV) photon and two near-infrared (NIR) photons and produces new higher-energy frequency components corresponding to the $ns/nd$ to ground-state $(2{s}^{2}2{p}^{6})$ transitions in the Neon Atom. The EUV emission exhibits small angular divergence (2 mrad) and monotonically increasing intensity over a pressure range of 0.5--16 Torr, suggesting phase matching in the production of the narrow-bandwidth coherent EUV light. In addition, time-resolved scans of the NIR nonlinear mixing process reveal the detection of a persistent, ultrafast bound electronic wave packet based on a coherent superposition initiated by the VUV pulse in the Neon Atoms. This FWM process using attosecond pulses offers a means for both efficient narrow-band EUV source generation and time-resolved investigations of ultrafast dynamics.
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near resonant four wave mixing of attosecond extreme ultraviolet pulses with near infrared pulses in Neon detection of electronic coherences
Physical Review A, 2016Co-Authors: Wei Cao, Erika R Warrick, Ashley P Fidler, Daniel M Neumark, S LeoneAbstract:Author(s): Cao, W; Warrick, ER; Fidler, A; Leone, SR; Neumark, DM | Abstract: © 2016 American Physical Society. Coherent narrow-band extreme-ultraviolet (EUV) light is generated by a near-resonant four-wave mixing (FWM) process between attosecond pulse trains and near-infrared pulses in Neon gas. The near-resonant FWM process involves one vacuum-ultraviolet (VUV) photon and two near-infrared (NIR) photons and produces new higher-energy frequency components corresponding to the ns/nd to ground-state (2s22p6) transitions in the Neon Atom. The EUV emission exhibits small angular divergence (2 mrad) and monotonically increasing intensity over a pressure range of 0.5-16 Torr, suggesting phase matching in the production of the narrow-bandwidth coherent EUV light. In addition, time-resolved scans of the NIR nonlinear mixing process reveal the detection of a persistent, ultrafast bound electronic wave packet based on a coherent superposition initiated by the VUV pulse in the Neon Atoms. This FWM process using attosecond pulses offers a means for both efficient narrow-band EUV source generation and time-resolved investigations of ultrafast dynamics.
Ashley P Fidler - One of the best experts on this subject based on the ideXlab platform.
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near resonant four wave mixing of attosecond extreme ultraviolet pulses with near infrared pulses in Neon detection of electronic coherences
Physical Review A, 2016Co-Authors: Wei Cao, Erika R Warrick, Ashley P Fidler, Stephen R Leone, Daniel M NeumarkAbstract:Coherent narrow-band extreme-ultraviolet (EUV) light is generated by a near-resonant four-wave mixing (FWM) process between attosecond pulse trains and near-infrared pulses in Neon gas. The near-resonant FWM process involves one vacuum-ultraviolet (VUV) photon and two near-infrared (NIR) photons and produces new higher-energy frequency components corresponding to the $ns/nd$ to ground-state $(2{s}^{2}2{p}^{6})$ transitions in the Neon Atom. The EUV emission exhibits small angular divergence (2 mrad) and monotonically increasing intensity over a pressure range of 0.5--16 Torr, suggesting phase matching in the production of the narrow-bandwidth coherent EUV light. In addition, time-resolved scans of the NIR nonlinear mixing process reveal the detection of a persistent, ultrafast bound electronic wave packet based on a coherent superposition initiated by the VUV pulse in the Neon Atoms. This FWM process using attosecond pulses offers a means for both efficient narrow-band EUV source generation and time-resolved investigations of ultrafast dynamics.
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near resonant four wave mixing of attosecond extreme ultraviolet pulses with near infrared pulses in Neon detection of electronic coherences
Physical Review A, 2016Co-Authors: Wei Cao, Erika R Warrick, Ashley P Fidler, Daniel M Neumark, S LeoneAbstract:Author(s): Cao, W; Warrick, ER; Fidler, A; Leone, SR; Neumark, DM | Abstract: © 2016 American Physical Society. Coherent narrow-band extreme-ultraviolet (EUV) light is generated by a near-resonant four-wave mixing (FWM) process between attosecond pulse trains and near-infrared pulses in Neon gas. The near-resonant FWM process involves one vacuum-ultraviolet (VUV) photon and two near-infrared (NIR) photons and produces new higher-energy frequency components corresponding to the ns/nd to ground-state (2s22p6) transitions in the Neon Atom. The EUV emission exhibits small angular divergence (2 mrad) and monotonically increasing intensity over a pressure range of 0.5-16 Torr, suggesting phase matching in the production of the narrow-bandwidth coherent EUV light. In addition, time-resolved scans of the NIR nonlinear mixing process reveal the detection of a persistent, ultrafast bound electronic wave packet based on a coherent superposition initiated by the VUV pulse in the Neon Atoms. This FWM process using attosecond pulses offers a means for both efficient narrow-band EUV source generation and time-resolved investigations of ultrafast dynamics.
Erika R Warrick - One of the best experts on this subject based on the ideXlab platform.
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near resonant four wave mixing of attosecond extreme ultraviolet pulses with near infrared pulses in Neon detection of electronic coherences
Physical Review A, 2016Co-Authors: Wei Cao, Erika R Warrick, Ashley P Fidler, Stephen R Leone, Daniel M NeumarkAbstract:Coherent narrow-band extreme-ultraviolet (EUV) light is generated by a near-resonant four-wave mixing (FWM) process between attosecond pulse trains and near-infrared pulses in Neon gas. The near-resonant FWM process involves one vacuum-ultraviolet (VUV) photon and two near-infrared (NIR) photons and produces new higher-energy frequency components corresponding to the $ns/nd$ to ground-state $(2{s}^{2}2{p}^{6})$ transitions in the Neon Atom. The EUV emission exhibits small angular divergence (2 mrad) and monotonically increasing intensity over a pressure range of 0.5--16 Torr, suggesting phase matching in the production of the narrow-bandwidth coherent EUV light. In addition, time-resolved scans of the NIR nonlinear mixing process reveal the detection of a persistent, ultrafast bound electronic wave packet based on a coherent superposition initiated by the VUV pulse in the Neon Atoms. This FWM process using attosecond pulses offers a means for both efficient narrow-band EUV source generation and time-resolved investigations of ultrafast dynamics.
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near resonant four wave mixing of attosecond extreme ultraviolet pulses with near infrared pulses in Neon detection of electronic coherences
Physical Review A, 2016Co-Authors: Wei Cao, Erika R Warrick, Ashley P Fidler, Daniel M Neumark, S LeoneAbstract:Author(s): Cao, W; Warrick, ER; Fidler, A; Leone, SR; Neumark, DM | Abstract: © 2016 American Physical Society. Coherent narrow-band extreme-ultraviolet (EUV) light is generated by a near-resonant four-wave mixing (FWM) process between attosecond pulse trains and near-infrared pulses in Neon gas. The near-resonant FWM process involves one vacuum-ultraviolet (VUV) photon and two near-infrared (NIR) photons and produces new higher-energy frequency components corresponding to the ns/nd to ground-state (2s22p6) transitions in the Neon Atom. The EUV emission exhibits small angular divergence (2 mrad) and monotonically increasing intensity over a pressure range of 0.5-16 Torr, suggesting phase matching in the production of the narrow-bandwidth coherent EUV light. In addition, time-resolved scans of the NIR nonlinear mixing process reveal the detection of a persistent, ultrafast bound electronic wave packet based on a coherent superposition initiated by the VUV pulse in the Neon Atoms. This FWM process using attosecond pulses offers a means for both efficient narrow-band EUV source generation and time-resolved investigations of ultrafast dynamics.
Sergey I Bokarev - One of the best experts on this subject based on the ideXlab platform.
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multireference quantum chemistry protocol for simulating autoionization spectra test of ionization continuum models for the Neon Atom
Physical Review A, 2019Co-Authors: Gilbert Grell, Oliver Kuhn, Sergey I BokarevAbstract:In this contribution we present a protocol to evaluate partial and total Auger decay rates combining the restricted active space self-consistent field electronic structure method for the bound part of the spectrum and numerically obtained continuum orbitals in the single-channel scattering theory framework. On top of that, the two-step picture is employed to evaluate the partial rates. The performance of the method is exemplified for the prototypical Auger decay of the Neon $1s^{-1}3p$ resonance. Different approximations to obtain the continuum orbitals, the partial rate matrix elements, and the electronic structure of the bound part are tested against theoretical and experimental reference data. It is demonstrated that the partial and total rates are most sensitive to the accuracy of the continuum orbitals. For instance, it is necessary to account for the direct Coulomb potential of the ion for the determination of the continuum wave functions. The Auger energies can be reproduced quite well already with a rather small active space. Finally, perspectives of the application of the proposed protocol to molecular systems are discussed.
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multireference quantum chemistry protocol for simulating autoionization spectra test of ionization continuum models for the Neon Atom
Physical Review A, 2019Co-Authors: Gilbert Grell, Oliver Kuhn, Sergey I BokarevAbstract:In this paper we present a protocol to evaluate partial and total Auger decay rates combining the restricted active space self-consistent field electronic structure method for the bound part of the spectrum and numerically obtained continuum orbitals in the single-channel scattering theory framework. Additionally, the two-step picture is employed to evaluate the partial rates. The performance of the method is exemplified for the prototypical Auger decay of the Neon $1s{\phantom{\rule{0.16em}{0ex}}}^{\ensuremath{-}1}3p$ resonance. Different approximations to obtain the continuum orbitals, the partial rate matrix elements, and the electronic structure of the bound part are tested against theoretical and experimental reference data. It is demonstrated that the partial and total rates are most sensitive to the accuracy of the continuum orbitals. For instance, it is necessary to account for the direct Coulomb potential of the ion for the determination of the continuum wave functions. The Auger energies can be reproduced quite well already with a rather small active space. Finally, perspectives of the application of the proposed protocol to molecular systems are discussed.
