Polarisatie van kleine halfgeleiderlasers

Uiterst kleine halfgeleiderlasers (vertical-cavity surface-emitting lasers) worden steeds vaker gebruikt voor allerlei toepassingen in optische communicatie, laserprinters en optische dataopslag. Vanuit wetenschappelijk oogpunt zijn met name de polarisatie eigenschappen van de lasertjes interessant. Het blijkt dat de polarisatie dominant bepaald wordt door de lineaire anisotropie: dubbele breking en dichroisme. De invloed van de niet-lineaire anisotropie is echter ook meetbaar.

Download Fotonica nr. 1, 1999

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References

Order of frictions and stiffnesses…

For lumped systems consisting of different frictions and stiffnesses, there has been confusion in literature about hysteresis curves and virtual play for many decades.

Make it clean

In mid-April, the second edition of the Manufacturing Technology Conference and the fifth edition of the Clean Event were held together, for the first time, at the Koningshof in Veldhoven (NL).

Bringing particles to light

Particle contamination monitoring and cleanliness control are fundamental to micromanufacturing processes across diverse industries to achieve cost-effective production of high-quality and reliable microscale devices and components.