On the accurate determination of absorption coefficient from reflectanceand transmittance measurements: Application to Fe-doped GaN

For light impinging normally on the surface of a double-side-polished sample of thickness d, the sample's absorption coefficient α can be determined from the well-known formula for fractional transmittance: Tmeas = (1 − R)2exp(−αd)/[1 − R2exp(−2αd)]. Here, R is a fundamental property of the air/samp... View More