  Light-concentrating truncated Si micropyramidal arrays with 54.7 degree
sidewall angles were successfully integrated with PtSi Schottky barrier
photodetectors. Four different devices consisting of 10 x 10 photodetectors
with 60 um pitch combined in parallel were tested, where significant
enhancement capability was demonstrated by the Si micropyramids. The device
consisting of one hundred 22 um square detectors monolithically integrated with
the light-concentrating micropyramidal array displayed signal enhancement of up
to 4 times compared to the same size 22 um square photodetector device without
the light concentrators.
