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
2004-01-01
171261 byte
Conference paper
Electronic Resource
English
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