Abstract

To determine accurately the absorption coefficient of GaAs <i>n</i>-doped crystals, we developed an apparatus which permits simultaneous measurement of the coefficients of absorption <i>K</i> and reflection <i>R</i><sub>12</sub> of samples. We have determined with high precision that the absorption edge is exponential, and thus brought to light that not only the concentration of the nt impurities, but also their nature changes the slope of the curve log <i>K</i> plotted as a function of the energy. We attribute this to stresses produced in the lattice by impurity atoms. Finally, we note that the reflection coefficients vary greatly from one sample to another.

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  1. T. S. Moss, Optical Properties of Semi-Conductors (Butter-worths Scientific Publications Ltd., London, 1961).
  2. W. E. Engeler and M. Garfinkel, J. Appl. Plhys. 34, 2746 (1963).
  3. R. E. Morrison, Phys. Rev. 124, 1314 (1961).
  4. J. I. Pankove, Phys. Rev. 140, 2059 (1965).
  5. D. E. Hill, Phys. Rev. 133, A866 (1964). 1230
  6. J. Lefevre, These Docteur es Sciences, Mention Sciences Appliquées, Lyon (1967).
  7. M. D. Sturge, Phys. Rev. 127, 768 (1962).
  8. W. J. Turner and W. E. Reese, J. Appl. Phys. 35, 350 (1964).
  9. T. S. Moss, J. Appl. Phys. (Suppl.) 32, 2136 (1961).
  10. E. Burstein, Phys. Rev. 93, 632 (1954).

Burstein, E.

E. Burstein, Phys. Rev. 93, 632 (1954).

Engeler, W. E.

W. E. Engeler and M. Garfinkel, J. Appl. Plhys. 34, 2746 (1963).

Garfinkel, M.

W. E. Engeler and M. Garfinkel, J. Appl. Plhys. 34, 2746 (1963).

Hill, D. E.

D. E. Hill, Phys. Rev. 133, A866 (1964). 1230

Lefevre, J.

J. Lefevre, These Docteur es Sciences, Mention Sciences Appliquées, Lyon (1967).

Morrison, R. E.

R. E. Morrison, Phys. Rev. 124, 1314 (1961).

Moss, T. S.

T. S. Moss, J. Appl. Phys. (Suppl.) 32, 2136 (1961).

T. S. Moss, Optical Properties of Semi-Conductors (Butter-worths Scientific Publications Ltd., London, 1961).

Pankove, J. I.

J. I. Pankove, Phys. Rev. 140, 2059 (1965).

Reese, W. E.

W. J. Turner and W. E. Reese, J. Appl. Phys. 35, 350 (1964).

Sturge, M. D.

M. D. Sturge, Phys. Rev. 127, 768 (1962).

Turner, W. J.

W. J. Turner and W. E. Reese, J. Appl. Phys. 35, 350 (1964).

Other

T. S. Moss, Optical Properties of Semi-Conductors (Butter-worths Scientific Publications Ltd., London, 1961).

W. E. Engeler and M. Garfinkel, J. Appl. Plhys. 34, 2746 (1963).

R. E. Morrison, Phys. Rev. 124, 1314 (1961).

J. I. Pankove, Phys. Rev. 140, 2059 (1965).

D. E. Hill, Phys. Rev. 133, A866 (1964). 1230

J. Lefevre, These Docteur es Sciences, Mention Sciences Appliquées, Lyon (1967).

M. D. Sturge, Phys. Rev. 127, 768 (1962).

W. J. Turner and W. E. Reese, J. Appl. Phys. 35, 350 (1964).

T. S. Moss, J. Appl. Phys. (Suppl.) 32, 2136 (1961).

E. Burstein, Phys. Rev. 93, 632 (1954).

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