Ionization coefficients of electrons and holes in InP

Abstract
The ionization coefficients of electrons and holes in InP have been determined from photomultiplication measurements on abrupt‐junction low‐leakage n p + InP avalanche photodiodes. The ionization rate of holes ( β) was found to be greater than that for electrons (α), the ratio varying with peak electric fieldE m from β/α=3.8 at E m =4.85×105 V cm−1 to β/α=2.7 at E m =6.37×105 V cm−1.