SiGeC/Si superlattice microcoolers

SiGeCÕSi superlattice microcoolers

Monolithically integrated active cooling is an attractive way for thermal management and temperature stabilization of microelectronic and optoelectronic devices. SiGeC can be lattice matched to Si and is a promising material for integrated coolers. SiGeC/Si superlattice structures were grown on Si substrates by molecular beam epitaxy. Thermal conductivity was measured by the 3v method. SiGeC/Si...

Design and characterization of thin film microcoolers

Thin film coolers can provide large cooling power densities compared to bulk thermoelectrics due to the close spacing of hot and cold junctions. Important parameters in the design of such coolers are investigated theoretically and experimentally. A three-dimensional ~3D! finite element simulator ~ANSYS! is used to model self-consistently thermal and electrical properties of a complete device st...

Thermal Transient Characterozation of Packaged Thin Film Microcoolers

A network identification by deconvolution (NID) method is applied to the thermal transient response of packaged and unpackaged microcoolers. A thin film resistor on top of the device is used as the heat source and the temperature sensor. The package and the bonding thermal resistances can be easily identified by comparing structure functions. High-speed coplanar probes are used to achieve a sho...

Superlattice Optical Elements

ZnSe/ZnSeTe Superlattice Nanotips

The authors report the growth of ZnSe/ZnSeTe superlattice nanotips on oxidized Si(100) substrate. It was found the nanotips exhibit mixture of cubic zinc-blende and hexagonal wurtzite structures. It was also found that photoluminescence intensities observed from the ZnSe/ZnSeTe superlattice nanotips were much larger than that observed from the homogeneous ZnSeTe nanotips. Furthermore, it was fo...