H. Fukano et al., EDGE-ILLUMINATED REFRACTING-FACET PHOTODIODE WITH HIGH RESPONSIVITY AND LOW-OPERATION VOLTAGE, Electronics Letters, 32(25), 1996, pp. 2346-2348
The authors propose a novel edge-illuminated refracting-facet photodio
de (RFPD), where the incident light parallel to the upside surface is
refracted at an angled facet and absorbed in a thin absorption layer.
Fabricated RFPDs with an absorption layer thickness of 1.5 mu m show a
responsivity as high as 0.96 A/W even at a bias voltage of 0.5 V for
a flat-ended singlemode fibre.