Piotr Grodzinski

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The National Science and Technology Council (NSTC) is the principal means by which the Executive Branch coordinates science and technology policy across the diverse entities that make up the Federal research and development enterprise. A primary objective of the NSTC is establishing clear national goals for Federal science and technology investments. The(More)
A fully integrated biochip device that consists of microfluidic mixers, valves, pumps, channels, chambers, heaters, and DNA microarray sensors was developed to perform DNA analysis of complex biological sample solutions. Sample preparation (including magnetic bead-based cell capture, cell preconcentration and purification, and cell lysis), polymerase chain(More)
—Dynamic beam switching of vertical-cavity surface-emitting lasers (VCSEL's) have been demonstrated for the first time using integrated optical beam routers. The output beam of the VCSEL is switched electrically between two different emission angles. High-speed switching up to 2 GHz has been achieved with an 8 m 2 8 m device. Such beam-steering devices are(More)
the modulation between 0 V and-4.3 V, in light of chirp and saturation considerations. The first mode of operation yields slightly negative chirp, whereas the second yields positive chirp. The optical saturation and carrier accumulation effects are much weaker in the first due to reduced coupling between optical fields and excitons, and due to more(More)
We report the first fabrication of a vertical three-dimensional 8 x 1 micro-Fresnel lens array by surface micromachining technique and we also demonstrate the hybrid integration of the micro-Fresnel lens array with a passively aligned 8 x 1 vertical cavity surface emitting laser (VCSEL) array on the same silicon substrate. The fabrication and(More)
shaped erbium-doped fibre amplifier with broad spectral bandwidth'. A record wide continuous wavelength tuning range of IO.lnm is demonstrated in vertical-cavity surface-emitting lasers (VCSELs) with monolithically integrated thin-film metal heaters. Single longitudinal mode and single transverse mode are maintained throughout the tuning range. The(More)
Absb-uct-Surface micromachining technique has been successfully applied to the fabrications of a three-dimensional 8 x 1 micro-Fresnel lens array and other novel three-dimensional alignment structures. With the help of these three-dimensional structures, self-aligned integration of the micro-Fresnel lens array and an 8 x 1 vertical-cavity surface-emitting(More)
An ultra-dense optical interconnection network is proposed for massively parallel processors. Using two-dimensional arrays of beam-steering vertical cavity surface-emitting lasers (VCSEL) as space-division switching elements, a single-chip, free-space photonic banyan network (or other multi-stage networks) can be constructed. Our scheme does not require(More)
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