Abstract
Structured plasmas are employed in order to realize the quasi-phase-matched generation of high harmonics. The plasma originates from laser ablated solids leading to the appearance of multiple separated jets. By altering the shape of the solid the dimensions of the plasma structure are easily optimized. Combining optimal jet widths and spacing the maximum enhancement of the harmonic intensity by a factor of 16 is observed after four plasma jets.
Highlights
High-harmonic generation (HHG) is an important process in attosecond-science [1]
Only about a factor of 10-6 of the power of the initial driving radiation is converted into a single harmonic in conventional HHG setups [2]
Since the plasma formation is dependent on the shape and spatial dimensions of a solid target, different plasma extensions and modulations are realizable
Summary
High-harmonic generation (HHG) is an important process in attosecond-science [1]. only about a factor of 10-6 of the power of the initial driving radiation is converted into a single harmonic in conventional HHG setups [2]. Structured plasmas are employed in order to realize the quasiphase-matched generation of high harmonics. Combining optimal jet widths and spacing the maximum enhancement of the harmonic intensity by a factor of 16 is observed after four plasma jets. Since the plasma formation is dependent on the shape and spatial dimensions of a solid target, different plasma extensions and modulations are realizable.
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