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Publication

Intrinsic spatial chirp of subcycle terahertz pulsed beams...

by George A Hine, Marc M Doleans
Publication Type
Journal
Journal Name
Physical Review A
Publication Date
Page Number
032229
Volume
104
Issue
3

We present an analysis of spatial chirp in subcycle pulsed beams corroborated by spatiotemporal electro-optic sampling measurements of terahertz radiation. Modeling the subcycle pulsed beam as a superposition of monochromatic Gaussian beams, free-space propagation is shown to directly lead to lateral spatial chirp with the spectrum on-axis substantially bluer than the overall energy spectrum. The two-transverse + one-temporal dimensional profile of terahertz subcycle pulsed beams from organic crystals DSTMS and OH1 are measured and compared with observed spatiospectral correlations consistent with the model.