Fractional high-order harmonic combs and energy tuning by attosecond-precision split-spectrum pulse control
We experimentally control high-order harmonic generation by applying a versatile few-cycle pulse-shape control method: splitting up a single broadband continuous laser spectrum into two sections and applying sub-femtosecond relative time delays. For certain time delays, fractional high-harmonic comb...
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| Main Authors: | , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
19 March 2012
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| In: |
Applied physics letters
Year: 2012, Volume: 100, Issue: 12 |
| ISSN: | 1077-3118 |
| DOI: | 10.1063/1.3693615 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1063/1.3693615 Verlag, Volltext: https://aip.scitation.org/doi/10.1063/1.3693615 
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| Author Notes: | Philipp Raith, Christian Ott, Christopher P. Anderson, Andreas Kaldun, Kristina Meyer, Martin Laux, Yizhu Zhang, Thomas Pfeifer |
| Summary: | We experimentally control high-order harmonic generation by applying a versatile few-cycle pulse-shape control method: splitting up a single broadband continuous laser spectrum into two sections and applying sub-femtosecond relative time delays. For certain time delays, fractional high-harmonic combs (noninteger harmonics) are generated which we find to result from the controlled interference of two attosecond pulse trains. We also observe time-delay-dependent energy-tunability of the high-order harmonics for an asymmetrically split spectrum consisting of a strong and a weak component. The tuning mechanism is quantitatively understood by the controlled modulation of the instantaneous driver frequency at the peak of the shaped laser pulse. |
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| Item Description: | Gesehen am 27.11.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1077-3118 |
| DOI: | 10.1063/1.3693615 |