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Broadband Spectral Amplitude Control in High-Order Harmonic Generation
UPC-Polytechnic University of Catalonia, Colom 11, 08222 Terrassa (Barcelona), Spain
Received: 26 October 2012; in revised form: 1 December 2012 / Accepted: 7 December 2012 / Published: 19 December 2012
Abstract: A technique for broadband spectral amplitude control of light pulses produced in high-order harmonic generation (HHG) is presented. It has been shown elsewhere that broadband spectral phase control in HHG is achievable using a computerized feedback loop scheme by coherently adding a filtered region of the HHG emission to the intense IR driving pulse with optimal attenuation and time delay parameters. In the present study, further computational evidence of the capabilities of this control scheme is provided by considering the spectral amplitude in a broadband region of the HHG spectrum as the control target for the production of isolated attosecond pulses. Different spectral widths and central photon energies are examined, such as a spectral width of 30 eV centered at 36 eV, well in the plateau, and a width of 20 eV centered at 60 eV in the cutoff region. An iterative procedure of the method is implemented and optimal isolated single cycle pulses at a central photon energy of 36 eV are obtained. This control scheme is a fundamental tool that can be implemented for amplitude and phase shaping of any suitable spectral region in HHG.
Keywords: ultrashort pulses; attosecond pulses; coherent control; high-order harmonic generation; strong field
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MDPI and ACS Style
Serrat, C. Broadband Spectral Amplitude Control in High-Order Harmonic Generation. Appl. Sci. 2012, 2, 816-830.
Serrat C. Broadband Spectral Amplitude Control in High-Order Harmonic Generation. Applied Sciences. 2012; 2(4):816-830.
Serrat, Carles. 2012. "Broadband Spectral Amplitude Control in High-Order Harmonic Generation." Appl. Sci. 2, no. 4: 816-830.