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.


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    Title :

    The consequences of diffractively spreading beams in ultrafast THz spectroscopy


    Contributors:
    Bowen, J.W. (author) / Walker, G.C. (author) / Hadjiloucas, S. (author) / Berry, E. (author)


    Publication date :

    2004-01-01


    Size :

    171261 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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