Optical microprobe response of GaAs diodes

1 August 1967

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electron Devices

Vol. 14 (8) , 429-432
https://doi.org/10.1109/T-ED.1967.15976

Abstract

GaAs p-n junction photocurrent response is obtained from an optical microprobe with a dynamic range of at least three decades and a light-spot diameter of about 1.3 µm. The results are found to correlate well with the appropriate theoretical response which includes surface recombination and assumed infinite absorption coefficient. Minority-carrier diffusion lengths computed from the data are typically 3.5 and 0.7 µm for holes in n-type material doped 1017and 1.4×1018cm-3and 1 µm for electrons in >1018cm-3doped p-type material. Estimates of carrier lifetimes are made and the deviation of surface recombination velocity between devices is demonstrated.

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