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Electro-luminescence and photo-luminescence from strained SiGe/Si quantum well

Photo-luminescence and electro-luminescence from step-graded index SiGe/Si quantum well grown by molecular beam epitaxy is reported. The SiGe/Si step-graded index quantum well structure is beneficial to the enhancing of electro-luminescence. The optical and electrical properties of this structure are discussed.

Noise measurement method for luminaires with tubular fluorescent lamps

The aim of this project has been to propose a method to determine sound power level produced by luminaires with tubular fluorescent lamps. Because fluorescent lamps are very low-level noise sources the requirements for the measurement method concerning the measuring site, equipment and carrying out the measurements have to be defined more explicitl...

RECRYSTALLIZATION, IMPURITY MIGRATION AND OPTICAL ACTIVATION OF YB-IMPLANTED SILICON INDUCED BY RAPID THERMAL ANNEALING

The rapid thermal annealing temperature dependence of the recrystallization, Yb migration and its optical activation were studied for Yb-implanted silicon. For the annealing regime 800-1000-degrees-C, the Yb segregates both at the crystal/amorphous interface and at the surface, which is different from the usual segregation of Er at the crystal/amor...

Crashes into road structures and equipment

The aim of the study was to find out the number of crashes into guardrails, electricity-, telephone-, lamp posts and other road structures so that preventive measures could be focused in a relevant way. For this purpose, the accident costs caused by a crash into guardrails and lamp posts were calculated. Calculations were based on a sample of accid...

Plantengroei in kunstlicht : literatuuroverzicht ten behoeve van verlichting nieuwe klimaatkamers CABO

Light valve projector for HDTV with 1600 lm light output using a 400 W lamp

Describes an improved light-valve system for color picture projection. An increased resolution is achieved by using finer carrier gratings regarding the deformation behaviour of the control layer. The efficiency of the light-valve is amended by applying cylindric lenses for illumination and use of interference filter stripes in the dark-filter syst...

Mededeling betreffende de toepassing van TL - buislampen voor de verlichting van landbouwbedrijfsgebouwen