Abstract
High harmonic generation is studied in gas species, namely pure H2, pure N2 and their mixture in 1:1 ratio. Observation of harmonic orders from 17H to 35H orders are well resolved. Harmonic spectrum produced from pure H2 are obtained, but the harmonic signal is weaker compared to that produced from pure N2 and from their mixture. Harmonic yield in gas mixture is enhanced compared to that from pure H2. The maximum photon energy that harmonic orders can reach is calculated with the well know cutoff formula. The experiment and the calculation results are in close agreement. In mixture of N2:H2, the higher harmonics are enhanced compared the plateau region harmonics. The enhancement of 35H orders in pure N2 or H2-N2 mixture is observed compared to pure H2.
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