2008
DOI: 10.1002/mop.23344
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Characterization of microstrip transmission lines at IR frequencies—Modeling, fabrication and measurements

Abstract: We report the complete characterization of microstrip lines at an infrared frequency of 28.3 THz (10.6‐μm wavelength) through modeling, fabrication, and measurement. The transmission‐line parameters of interest can not be directly measured at infrared frequencies—the only measurable quantity is the voltage response of the antenna‐coupled bolometric sensor. We validate the computational approach for transmission‐line parameters by verifying the computed and measured response of the antenna connected to microstr… Show more

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Cited by 13 publications
(7 citation statements)
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“…The index of refraction is less than zero, therefore the phase velocity is orientated the opposite direction of energy flow. This was later followed by numerous analytical formulations [10][11][12] of the LH medium.…”
Section: Received 4 July 2012mentioning
confidence: 99%
“…The index of refraction is less than zero, therefore the phase velocity is orientated the opposite direction of energy flow. This was later followed by numerous analytical formulations [10][11][12] of the LH medium.…”
Section: Received 4 July 2012mentioning
confidence: 99%
“…Extending previous efforts based on bolometric measurements [9,11], here we demonstrate the measurement of the attenuation and propagation constants of individual antenna-coupled CPSs at long-wave IR frequencies using scattering-type scanning near-field optical microscopy (s-SNOM), which we have previously used to characterize IR dipole antenna modes [13,15]. Reflection of propagating optical excitation upon an open-circuit or short-circuit load at the terminal of the CPS provides a standing wave [16], which is mapped through the phase-sensitive measurement of the associated surface-normal E z electric nearfield component at the metal-air interface.…”
Section: Introductionmentioning
confidence: 91%
“…The size of the guiding structure can be reduced by either replacing the dielectric core with a negative index dielectric material to reduce the spatial extent of the guided mode [7], or by replacing the dielectric waveguide by a transmission line. Applying concepts adapted from the radio frequency (RF) regime, the transmission line can be constructed of nanoinductors and nanocapacitors based on metamaterials [8], a metal strip separated from a ground plane by a dielectric standoff layer creating a microstrip [9], or two parallel metal wires forming a coplanar strip (CPS) transmission line. The latter stands out for its structural simplicity and the ease with which it can be integrated with planar antenna designs [10][11][12].…”
Section: Introductionmentioning
confidence: 99%
“…Conventional waveguide geometries developed for the microwave regime, such as microstrip transmission lines [8,9] also support hybrid SPP like modes at optical wavelengths. Nanostrip waveguides with geometry similar to conventional microwave microstrip transmission lines have been demonstrated at λ = 10.6 µm [10] and have been proposed for use at λ = 1.55 µm in components such as branch couplers and filters [11].…”
Section: Introductionmentioning
confidence: 99%