Christian Haffner

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Plasmonic modulators might pave the way for a new generation of compact low-power high-speed optoelectronic devices. We introduce an extremely compact transmitter based on plasmonic Mach-Zehnder modulators offering a capacity of 4 × 36 Gbit/s on a footprint that is only limited by the size of the high-speed contact pads. The transmitter array is contacted(More)
We report on high-speed plasmonic-organic hybrid Mach-Zehnder modulators comprising ultra-compact phase shifters with lengths as small as 19 µm. Choosing an optimum phase shifter length of 29 µm, we demonstrate 40 Gbit/s on-off keying (OOK) modulation with direct detection and a BER < 6 × 10(-4). Furthermore, we report on a 29 µm long binary-phase shift(More)
A scheme for the direct conversion of millimeter and THz waves to optical signals is introduced. The compact device consists of a plasmonic phase modulator that is seamlessly cointegrated with an antenna. Neither high-speed electronics nor electronic amplification is required to drive the modulator. A built-in enhancement of the electric field by a factor(More)
In this paper, we demonstrate an integrated microwave phoneeded for beamtonics phased array antenna feeder at 60 GHz with a record-low footprint. Our design is based on ultra-compact plasmonic phase modulators (active area <2.5µm<sup>2</sup>) that not only provide small size but also ultra-fast tuning speed. In our design, the integrated circuit footprint(More)
Speed, footprint, power consumption and economiy of costs are key factors in the field of communications. The new field of plasmonics promises THz bandwidth devices with a micrometer footprint operating with fJ/bit at prices that scale similar to what is known from the CMOS industry. In this paper we will review recent advances in the field of plasmonics.(More)
Scientific evaluation is a fundamental tool of effective quality assurance of continuing medical education (CME). The analysis of the evaluation system of the CME academy of one the German Regional Medical Associations has revealed both the strengths and weaknesses of this system, thus enabling the installation of a model-like quality control system. Of(More)
The arrival of the Single-Atom Transistor (SAT) in 2004, a quantum device operated at room temperature, allowed for the first controlled switching of an electrical current by the reproducible relocation of one single metal atom [1]. At the same time this component established the feasibility of transistors completely made of metals. Meanwhile, many(More)
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