Calculation and manipulation of the chirp rates of high-order harmonics

Murakami, M; Mauritsson, J; Schafer, K J; Gaarde, M B; L'Huillier, A

doi:10.1103/PhysRevA.71.013410

Title: Calculation and manipulation of the chirp rates of high-order harmonics

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Abstract

We calculate the linear chirp rates of high-order harmonics in argon, generated by intense, 810 nm laser pulses, and explore the dependence of the chirp rate on harmonic order, driving laser intensity, and pulse duration. By using a time-frequency representation of the harmonic fields we can identify several different linear chirp contributions to the plateau harmonics. Our results, which are based on numerical integration of the time-dependent Schroedinger equation, are in good agreement with the adiabatic predictions of the strong field approximation for the chirp rates. Extending the theoretical analysis in the recent paper by Mauritsson et al. [Phys. Rev. A 70, 021801(R) (2004)], we also manipulate the chirp rates of the harmonics by adding a chirp to the driving pulse. We show that the chirp rate for harmonic q is given by the sum of the intrinsic chirp rate, which is determined by the new duration and peak intensity of the chirped driving pulse, and q times the external chirp rate.

Authors:

Murakami, M; Mauritsson, J; Schafer, K J; Gaarde, M B ^[1]; L'Huillier, A ^[2]

Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001 (United States)
Department of Physics, Lund Institute of Technology, P. O. Box 118, S-22100 Lund (Sweden)

Publication Date:: Sat Jan 01 00:00:00 EST 2005

OSTI Identifier:: 20650263

Resource Type:: Journal Article

Journal Name:: Physical Review. A

Additional Journal Information:: Journal Volume: 71; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.71.013410; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS; ARGON; HARMONICS; LASER RADIATION; PULSES; SCHROEDINGER EQUATION; TIME DEPENDENCE

Citation Formats


                    Murakami, M, Mauritsson, J, Schafer, K J, Gaarde, M B, and L'Huillier, A. Calculation and manipulation of the chirp rates of high-order harmonics.  United States: N. p., 2005. 
        Web.  doi:10.1103/PhysRevA.71.013410.

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                    Murakami, M, Mauritsson, J, Schafer, K J, Gaarde, M B, & L'Huillier, A. Calculation and manipulation of the chirp rates of high-order harmonics.  United States.  https://doi.org/10.1103/PhysRevA.71.013410

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                    Murakami, M, Mauritsson, J, Schafer, K J, Gaarde, M B, and L'Huillier, A. 2005.  
        "Calculation and manipulation of the chirp rates of high-order harmonics".  United States.  https://doi.org/10.1103/PhysRevA.71.013410.

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@article{osti_20650263,

  title        = {Calculation and manipulation of the chirp rates of high-order harmonics},

  author       = {Murakami, M and Mauritsson, J and Schafer, K J and Gaarde, M B and L'Huillier, A},

  abstractNote = {We calculate the linear chirp rates of high-order harmonics in argon, generated by intense, 810 nm laser pulses, and explore the dependence of the chirp rate on harmonic order, driving laser intensity, and pulse duration. By using a time-frequency representation of the harmonic fields we can identify several different linear chirp contributions to the plateau harmonics. Our results, which are based on numerical integration of the time-dependent Schroedinger equation, are in good agreement with the adiabatic predictions of the strong field approximation for the chirp rates. Extending the theoretical analysis in the recent paper by Mauritsson et al. [Phys. Rev. A 70, 021801(R) (2004)], we also manipulate the chirp rates of the harmonics by adding a chirp to the driving pulse. We show that the chirp rate for harmonic q is given by the sum of the intrinsic chirp rate, which is determined by the new duration and peak intensity of the chirped driving pulse, and q times the external chirp rate.},

  doi          = {10.1103/PhysRevA.71.013410},

  url          = {https://www.osti.gov/biblio/20650263},
  journal      = {Physical Review. A},

  issn         = {1050-2947},

  number       = 1,

  volume       = 71,

  place        = {United States},

  year         = {Sat Jan 01 00:00:00 EST 2005},

  month        = {Sat Jan 01 00:00:00 EST 2005}

}

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