Daniel Stock

Universität Siegen

p>Graphene antennas operating at mm-wave and THz frequencies enable miniaturization by being smaller than its metallic counterparts, while additionally providing frequency tunability capabilities. These characteristics are interesting for 6G short-range communication applications, where the antenna size is still one of the largest and, consequently...

p>Graphene antennas operating at mm-wave and THz frequencies enable miniaturization by being smaller than its metallic counterparts, while additionally providing frequency tunability capabilities. These characteristics are interesting for 6G short-range communication applications, where the antenna size is still one of the largest and, consequently...

Non-homogeneous, bi-directional glass fabric reinforced thermoplastic (GFRT) composites are used in the automobile industry to produce economic and environmentally friendly vehicles. Despite the fact that GFRT materials have superior mechanical characteristics and lower manufacturing cost compared with traditional materials, they are prone to signi...

Non-homogeneous, bi-directional glass fabric reinforced thermoplastic (GFRT) composites are used in the automobile industry to produce economic, environmentally friendly and recyclable vehicles. Despite the fact that GFRT materials have superior mechanical characteristics and lower manufacturing cost compared with traditional materials, they are pr...

Graphene supports surface plasmon polaritons with comparatively slow propagation velocities in the THz region, which becomes increasingly interesting for future communication technologies. This ability can be used to realize compact antennas, which are up to two orders of magnitude smaller than their metallic counterparts. For a proper functionalit...

We demonstrate a reduction of THz material parameter estimation errors by a factor of 40, using a time-domain material-model-based extraction method, in comparison with the respective frequency-domain approach. Based on simulated and experimentally measured THz time-domain spectroscopy data with different levels of the signal-to-noise ratios (SNR),...

We show the first THz emission of a graphene based plasmonic antenna structure. Furthermore we present the minimum material requirements for an operational graphene antenna in terms of chemical potential μc and relaxation time τ.

We investigate quantitatively the error of physical material-model based schemes for time-domain and frequency-domain analyses used to extract material-parameters from measurements acquired by THz time-domain spectroscopy (TDS) systems. An analytic analysis of the noise induced error and its effect on both methods is presented. Especially critical...

We compare physical material-model based schemes for time-domain and frequency-domain analysis of measurement data. Such approaches can be used to extract material-parameters from measurements acquired by THz time-domain spectroscopy (TDS) systems. A detailed intercomparison of both analytic methods is presented. Cases with resonance features and l...

Terahertz waves can be guided with low losses along thin layers of a strongly absorbing medium embedded in a dielectric. By means of end-fire coupling experiments, we demonstrate the polarization dependent excitation, propagation, and detection of this loss-guided mode, demonstrating long propagation lengths for terahertz radiation along thin water...