Far-infrared second-harmonic generation and pulse characterization with the organic salt DAST.
We generated the second harmonics of pulses in the far-infrared region (30-55 microm), using the organic salt dimethylamino-4-N-methylstilbazolium tosylate (DAST). We demonstrate that DAST can be used to characterize ultrashort pulses in a spectral region where no other materials are available. To illustrate the need for such characterizations, we show the effects of propagation through air on the shape of ultrashort far-infrared pulses.
van Dantzig
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NA
Planken
P C
PC
Bakker
H J
HJ