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Optical Anisotropy of Er Centers in GaAs:Er,O

  • R. A. Hogg (a1), K. Takahei (a1), A. Taguchi (a1) and Y. Horikoshi (a1)


For GaAs:Er,O the anisotropic photoluminescence (PL) properties of the Er-20 center and its preferential alignment within the GaAs matrix have been revealed by the polarization dependence of host-excited PL when detecting emission polarized along certain crystallographic directions. In the present paper, a polarized intra-4f-shell photoluminescence excitation (PLE) spectroscopic study of Er centers incorporated in GaAs is reported. This technique is not only sensitive to those centers which luminesce under host-excitation, but also to other Er centers incorporated in the host, thus allowing the polarized PL properties of most Er centers to be studied. A comparison of the polarization characterisitcs of host-excited PL and direct intra-4f-shell PLE, due to the difference in the excitation mechanisms, is made and the information which may be gained from such measurements is discussed. For the Er-20 center, we confirm the optical anisotropy and preferential alignment of the center previously observed in host-excited PL. Incorporation mechanisms for the Er-20 center which could result in the observed polarization dependence are discussed.



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[I] Rare Earth Doped Semiconductors, Materials Research Society Symposium Proceedings 1993, edited by Pomrenke, G.S., Klein, P.B., and Langer, D.W. (Materials Research Society, Pittsburgh, PA, 1993), Vol.301.
[2] Takahei, K., Taguchi, A., J. Appl. Phys. 74, 1979, (1993).
[3] Takahei, K., Taguchi, A., Jpn. J Appl. Phys. 33, 709, (1994).
[4] Takahei, K., Taguchi, A., J. Appl. Phys. 77, 1735, (1995).
[5] Takahei, K., Taguchi, A., Horikoshi, Y., Nakata, J.. J. Appl. Phys. 76, 4332, (1994).
[6] Haase, D., Dörnen, A., Takahei, K., Taguchi, A.. Presented at this conference.
[7] Taguchi, A., Takahei, K.. Proceedings to the 18th International Conference on Defects in Semiconductors. Materials Science Forum, 197, 633, (1995).
[8] Feofilov, P.P., Kaplyanskii, A.A.. Sov. Phys. Uspekhi. 5, 79, (1962).
[9] Buyanova, I.A., Neuhalfen, A.J., Wessels, B W. Appl. Phys. Lett. 61, 2461, (1992).
[10] Hogg, R.A., Takahei, K., Taguchi, A., Horikoshi, Y.. Appl. Phys. Lett. In Press.
[11] Takahei, K.. Unpublished results.
[12] Neave, J.H., Joyce, B.A., Dobson, P.J., Norton, N.. Appl. Phys. A31, 1, (1983).
[13] Skolnick, M.S., Harris, T.D., Tu, C.W., Brennan, T.M., Sturge, M.D.. Appl. Phys. Lett. 46, 427, (1985). M.S. Skolnick, C.W. Tu, T.D. Harris. Phys. Rev. B33, 8468, (1986).
[14] Davidson, B.R., Newman, R.C., Kaneko, T., Naji, O.. Phys Rev. B50, 12250, (1994).B.R. Davidson, R.C. Newman, K.H. Bachem. Phys. Rev. B52, 5179, (1995).


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