Modern InGaAs PIN photodiodes are panchromatic. The regular sensitivity range is 500 nm to 1700 nm; for extended InGaAs diodes, this range extends to 2600 nm.
Si PIN Photodiodes. Si photodiodes are reverse-biased PIN diodes. They detect light in a range from 250 nm to 1.1 µm. The incident radiation results in a measurable photocurrent.