There are established methods for calculating optical constants from measurements using a broadband terahertz (THz) source. Applications to ultrafast THz spectroscopy have adopted the key assumption that the THz beam is treated as a normal incidence plane-wave. We show that this assumption results in a frequency-dependent systematic error, which is compounded by distortion of the beam on introduction of the sample.
The consequences of diffractively spreading beams in ultrafast THz spectroscopy
01.01.2004
171261 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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