Abstract
The refractive indices and the coefficients of optical absorption by free charge carriers and local vibrations in porous silicon (por-Si) films, comprising nanometer-sized silicon residues (nanocrystals) separated by nanometer-sized pores (nanopores) formed in the course of electrochemical etching of the initial single crystal silicon, have been studied by polarization-resolved IR absorption spectroscopy techniques. It is shown that the birefringence observed in por-Si is related to the anisotropic shapes of nanocrystals and nanopores, while the anisotropy (dichroism) of absorption by the local vibrational modes is determined predominantly by the microrelief of the surface of nanocrystals. It is demonstrated that silicon-hydrogen surface bonds in nanocrystals can be restored by means of selective hydrogen thermodesorption with the formation of a considerable number of H-terminated surface Si-Si dimers.
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References
A. G. Cullis, L. T. Canham, and P. D. J. Calcott, J. Appl. Phys. 82, 909 (1997).
W. Theiß, Surf. Sci. Rep. 29, 91 (1997).
O. Bisi, S. Ossicini, and L. Pavesi, Surf. Sci. Rep. 38, 1 (2000).
N. Künzner, D. Kovalev, J. Diener, et al., Opt. Lett. 26, 16 (2001).
P. K. Kashkarov, L. A. Golovan, A. B. Fedotov, et al., J. Opt. Soc. Am. B 19, 2273 (2002).
P. K. Kashkarov, L. A. Golovan’, S. V. Zabotnov, et al., Fiz. Tverd. Tela (St. Petersburg) 47, 153 (2005) [Phys. Solid State 47, 159 (2005)].
L. Boarino, C. Boratto, F. Geobaldo, et al., Mater. Sci. Eng. B 69–70, 210 (2000).
L. Pancheri, C. J. Oton, Z. Caburro, et al., Sens. Actuators B: Chem. 89, 237 (2003).
A. V. Pavlikov, L. A. Osminkina, I. A. Belogorokhov, et al., Fiz. Tekh. Poluprovodn. (St. Petersburg) 39, 1385 (2005) [Semiconductors 39, 1338 (2005)].
L. P. Kuznetsova, A. I. Efimova, L. A. Osminkina, et al., Fiz. Tverd. Tela (St. Petersburg) 44, 780 (2002) [Phys. Solid State 44, 811 (2002)].
Tables of Physical Data: Reference Book, Ed. by I. K. Kikoin (Atomizdat, Moscow, 1976) [in Russian].
V. Yu. Timoshenko, L. A. Osminkina, A. I. Efimova, et al., Phys. Rev. B 67, 113405 (2003).
V. Yu. Timoshenko, L. A. Osminkina, A. I. Efimova, et al., Phys. Status Solidi C 2, 3461 (2005).
N. Künzner, J. Diener, E. Gross, et al., Phys. Rev. B 71, 195304 (2005).
P. Gupta, V. T. Colvin, and S. M. George, Phys. Rev. B 37, 8234 (1988).
T. Ito, Y. Kato, and A. Hiraki, in The Structure of Surfaces II, Ed. by J. F. Van der Veen and M. A. Van Hove (Springer, Berlin, 1988), p. 378.
J. J. Boland, Surf. Sci. 261, 17 (1992).
M. I. Strashnikova, Opt. Spektrosk. 93, 142 (2002) [Opt. Spectrosc. 93, 132 (2002)].
J. E. Spanier and I. P. Herman, Phys. Rev. B 61, 10437 (2000).
J. A. Osborn, Phys. Rev. 67, 351 (1945).
Yu. A. Petrov, Physics of Small Particles (Nauka, Moscow, 1982) [in Russian].
Y. J. Chabal and K. Raghavachari, Phys. Rev. Lett. 53, 282 (1984).
H. Noda and T. Urusi, Chem. Phys. Lett. 326, 163 (2000).
Y. J. Chabal, G. S. Higashi, K. Raghavachari, et al., J. Vac. Sci. Technol. A 7, 2104 (1989).
T. Tsuboi, T. Sakka, and Y. H. Ogata, Solid State Commun. 109, 195 (1999).
M. Nakamura, M.-B. Song, and M. Ito, Electrochem. Acta 41, 681 (1995).
Y. Kimura, Y. Kondo, and M. Niwano, Appl. Surf. Sci. 175–176, 157 (2001).
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Original Russian Text © A.I. Efimova, E.Yu. Krutkova, L.A. Golovan’, M.A. Fomenko, P.K. Kashkarov, V.Yu. Timoshenko, 2007, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 132, No. 3, pp. 680–693.
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Efimova, A.I., Krutkova, E.Y., Golovan’, L.A. et al. Birefringence and anisotropic optical absorption in porous silicon. J. Exp. Theor. Phys. 105, 599–609 (2007). https://doi.org/10.1134/S1063776107090178
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DOI: https://doi.org/10.1134/S1063776107090178