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https://hdl.handle.net/2440/63705
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Type: | Journal article |
Title: | Direct probing of evanescent field for characterization of porous terahertz fibers |
Author: | Atakaramians, S. Afshar Vahid, S. Nagel, M. Rasmussen, H. Bang, O. Monro, T. Abbott, D. |
Citation: | Applied Physics Letters, 2011; 98(12):1-3 |
Publisher: | Amer Inst Physics |
Issue Date: | 2011 |
ISSN: | 0003-6951 1077-3118 |
Statement of Responsibility: | Shaghik Atakaramians, Shahraam Afshar V., Michael Nagel, Henrik K. Rasmussen, Ole Bang, Tanya M. Monro, and Derek Abbott |
Abstract: | We develop a technique based on a micromachined photoconductive probe-tip to characterize a terahertz (THz) porous fiber. Losses less than 0.08 cm-1 are measured in the frequency range from 0.2 to 0.35 THz, with the minimum of 0.003 cm-1 at 0.24 THz. Normalized group velocity greater than 0.8, which corresponds to dispersion values in between -1.3 and -0.5 ps/m/μm for 0.2<f<0.35 THz are obtained. Moreover, we directly measure the evanescent electric field as a function of frequency. Good agreement between the measured curves and expected theoretical values indicates the low invasiveness of the applied probe-tip. © 2011 American Institute of Physics. |
Rights: | © 2011 American Institute of Physics |
DOI: | 10.1063/1.3568892 |
Grant ID: | http://purl.org/au-research/grants/arc/DP0556112 http://purl.org/au-research/grants/arc/DP0880436 |
Published version: | http://dx.doi.org/10.1063/1.3568892 |
Appears in Collections: | Aurora harvest IPAS publications |
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