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Knab, J.R. (author), Adam, A.J.L. (author), Chakkittakandy, R. (author), Planken, P.C.M. (author)
Using near-field, terahertz time-domain spectroscopy (THz-TDS), we investigate how the addition of a dielectric material into a subwavelength-diameter, cylindrical waveguide affects its transmission properties. The THz electric near-field is imaged with deep subwavelength resolution as it emerges from filled and unfilled waveguides....
journal article 2010
document
Wang, K. (author), Mittleman, D.M. (author), Van der Valk, N.C.J. (author), Planken, P.C.M. (author)
We have performed measurements on terahertz (THz) apertureless near-field microscopy that show that the temporal shape of the observed near-field signals is approximately proportional to the time-integral of the incident field. Associated with this signal change is a bandwidth reduction by approximately a factor of 3 which is observed using both...
journal article 2004