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SQIF-based dc SQUID amplifier with intrinsic negative feedback
We report on a two-stage system consisting of a dc SQUID magnetometer inductively coupled to an amplifying second stage realized by a SQIF. The SQIF is a series or parallel connection of dc SQUIDs with...
PublikationenMagnetic core-shell fluorescent pH ratiometric nanosensor using a stöber coating method
We describe the use of a modified Stöber method for coating maghemite ( -Fe2O3) nanocrystals with silica shells in order to built magnetic fluorescent sensor nanoparticles in the 50–70 nm diameter range....
PublikationenCryogenic ultra-low noise SiGe transitor amplifier
An ultra-low-noise one-stage SiGe heterojunction bipolar transistor amplifier was designed for cryogenic temperatures and a frequency range of 10 kHz-100 MHz. A noise temperature T N ≈ 1.4...
PublikationenBi-SQUIDs with submicron cross-type Josephson tunnel junctions
We report on the development and experimental evaluation of bi-SQUIDs with sub-micron cross-type shunted Josephson tunnel junctions characterized by low capacitance. Such a technology meant for SQUID sensors,...
PublikationenMolecular Gating of Silicon Nanowire Field-Effect Transistors with Nonpolar Analytes
Silicon Nanowire Field Effect Transistors (Si NW FETs) have been used as powerful sensors for chemical and biological species. The detection of polar species has been attributed to variations in the electric...
PublikationenInvestigation of hydrogen implantation-induced blistering phenomenon in Si0.7Ge0.30
The blistering phenomenon in hydrogen implanted and annealed Si0.70Ge0.30(0 0 1) layers was investigated. The implantation was performed with 240 keV H2 + ions with a fluence of 5 × 1016 cm−2. The blistering...
PublikationenQuantitative phase and refractive index measurements with point-source digital in-line holographic microscopy
Point source Digital In-line Holographic Microscopy with numerical reconstructio is ideally suited for quantitative phase measurements to determine optical path lengths and to extract changes in refractive...
PublikationenGeneration of high quality, 1.3 cycle pulses by active phase control of an octave spanning supercontinuum
Nonlinear pulse compression based on the generation of ultra-broadband supercontinuum (SC) in an all-normal dispersion photonic crystal fiber (ANDi PCF) is demonstrated. The highly coherent and smooth...
PublikationenIdentification of primary tumors of brain metastases by Raman imaging and support vector machines
Vibrational spectroscopic imaging techniques are new tools for visualizing chemical components in tissue without staining. The spectroscopic signature can be used as a molecular fingerprint of pathological...
PublikationenRaman and FTIR Microspectroscopy for Detection of Brain Metastasis
Vibrational spectroscopic imaging methods are novel tools to visualise chemical component in tissue without staining. Fourier transform infrared (FTIR) imaging is more frequently applied than Raman imaging...
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