313 citations · 1.4k across the 30 of their papers we have counts for
8 papers · 1 filter
High-power photoconductive THz emitters for fast parallel electro-optic detection
Mohsen Khalili, Robin Löscher, Anna Martinez +3
The terahertz (THz) region is highly attractive for imaging because it penetrates many optically opaque materials and can distinguish them by composition. Among the various methods…
Ultra-Broadband Visible and Infrared Light Generation Driven by Far Infrared Light in the Broad Region from 8μm to 240μm
Nils W. Rosemann, Robin C. Döring, Eike Dornsiepen +12
The most commonly used nonlinear optical process is the conversion of infrared light at 1064nm to green light at 532nm, as performed in common laser pointers. However, more relevan…
Up to 70 THz bandwidth from implanted Ge photoconductive antenna excited by a fibre laser
Abhishek Singh, Alexej Pashkin, Stephan Winnerl +6
Phase-stable electromagnetic pulses in the THz frequency range offer several unique capabilities in time-resolved spectroscopy. However, the diversity of their application is limit…
Infrared/Terahertz Spectra of the Photogalvanic Effect in (Bi,Sb)Te based Three Dimensional Topological Insulators
H. Plank, J. Pernul, S. Gebert +9
We report on the systematic study of infrared/terahertz spectra of photocurrents in (Bi,Sb)Te based three dimensional topological insulators. We demonstrate that in a wide range of…
Terahertz Nonlinearity in Graphene Plasmons
Mohammad M. Jadidi, Jacob C. König-Otto, Stephan Winnerl +4
Sub-wavelength graphene structures support localized plasmonic resonances in the terahertz and mid-infrared spectral regimes. The strong field confinement at the resonant frequency…
Ultrafast graphene-based broadband THz detector
Martin Mittendorff, Stephan Winnerl, Josef Kamann +4
We present an ultrafast graphene-based detector, working in the THz range at room temperature. A logarithmic-periodic antenna is coupled to a graphene flake that is produced by exf…
Ultra-fast transistor-based detectors for precise timing of near infrared and THz signals
S. Preu, M. Mittendorff, S. Winnerl +3
A whole class of two-color experiments involves intense, short Terahertz radiation pulses. A fast detector that is sensitive and able to resolve both near-infrared and Terahertz pu…
Universal phase relation between longitudinal and transverse fields observed in focused terahertz beams
S. Winnerl, R. Hubrich, M. Mittendorff +2
We directly observe longitudinal electromagnetic fields in focused freely propagating terahertz beams of radial and linear polarization. In accordance with theory, the longitudinal…