Abstract

Backscattering signals at small grazing angles are important for space vehicle atmospheric reentrance and subsurface radar sensing applications. They are also useful in Fourier-transform infrared grazing-angle microscopy. Recently we performed an experimental study of far-field scattering at small grazing angles, in particular, of enhanced backscattering at grazing angles. For a randomly weak rough dielectric film upon a reflecting metal substrate, a large enhanced backscattering peak was measured. Experimental results are compared with small perturbation theoretical predictions.

© 2002 Optical Society of America

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References

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  1. Isaac Newton, Opticks (London, 1704; new edition, Dover, New York, 1952), pp. 289 ff.
  2. T. Young, Philos. Trans. R. Soc. London Ser. A 12–48 (1802).
    [Crossref]
  3. John Herschel, Encylopedia Metropolitana, 1828.
  4. Z.-H. Gu, M. Josse, and M. Ciftan, Opt. Eng. 35, 370 (1996).
    [Crossref]
  5. J. Q. Lu, J. A. Sanchez-Gil, E. Maendez, Z.-H. Gu, and A. A. Maradudin, J. Opt. Soc. Am. A 15, 185 (1998).
    [Crossref]
  6. I. M. Fuks and V. G. Voronovich, Waves Random Media 10, 253 (2000).
  7. I. M. Fuks, IEEE Trans. Antennas Propag. 49, 630 (2001).
    [Crossref]

2001 (1)

I. M. Fuks, IEEE Trans. Antennas Propag. 49, 630 (2001).
[Crossref]

2000 (1)

I. M. Fuks and V. G. Voronovich, Waves Random Media 10, 253 (2000).

1998 (1)

1996 (1)

Z.-H. Gu, M. Josse, and M. Ciftan, Opt. Eng. 35, 370 (1996).
[Crossref]

1802 (1)

T. Young, Philos. Trans. R. Soc. London Ser. A 12–48 (1802).
[Crossref]

Ciftan, M.

Z.-H. Gu, M. Josse, and M. Ciftan, Opt. Eng. 35, 370 (1996).
[Crossref]

Fuks, I. M.

I. M. Fuks, IEEE Trans. Antennas Propag. 49, 630 (2001).
[Crossref]

I. M. Fuks and V. G. Voronovich, Waves Random Media 10, 253 (2000).

Gu, Z.-H.

Herschel, John

John Herschel, Encylopedia Metropolitana, 1828.

Josse, M.

Z.-H. Gu, M. Josse, and M. Ciftan, Opt. Eng. 35, 370 (1996).
[Crossref]

Lu, J. Q.

Maendez, E.

Maradudin, A. A.

Newton, Isaac

Isaac Newton, Opticks (London, 1704; new edition, Dover, New York, 1952), pp. 289 ff.

Sanchez-Gil, J. A.

Voronovich, V. G.

I. M. Fuks and V. G. Voronovich, Waves Random Media 10, 253 (2000).

Young, T.

T. Young, Philos. Trans. R. Soc. London Ser. A 12–48 (1802).
[Crossref]

IEEE Trans. Antennas Propag. (1)

I. M. Fuks, IEEE Trans. Antennas Propag. 49, 630 (2001).
[Crossref]

J. Opt. Soc. Am. A (1)

Opt. Eng. (1)

Z.-H. Gu, M. Josse, and M. Ciftan, Opt. Eng. 35, 370 (1996).
[Crossref]

Philos. Trans. R. Soc. London (1)

T. Young, Philos. Trans. R. Soc. London Ser. A 12–48 (1802).
[Crossref]

Waves Random Media (1)

I. M. Fuks and V. G. Voronovich, Waves Random Media 10, 253 (2000).

Other (2)

John Herschel, Encylopedia Metropolitana, 1828.

Isaac Newton, Opticks (London, 1704; new edition, Dover, New York, 1952), pp. 289 ff.

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Figures (3)

Fig. 1
Fig. 1

Schematic of scattering from a dielectric film on a reflecting substrate: (a) indicatrix scattering, (b) near-backscattering direction.

Fig. 2
Fig. 2

Experimental results for (a) p polarization and (b) s polarization.

Fig. 3
Fig. 3

Backscattering peak enhancement γ.

Equations (11)

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σαβ0ks,ki=πk04-12fαβ2Sζq,
fss=1+Rθi1+Rθs.
R=R0+R1 expiφ1+R0R1 expiφ-1.
Kss=σss0/σ¯ss=CθiCθs,
Cθ=1+r121+2r01-r0r12-1.
σss01+Rθi4,
K0ss=1=r121+r121+A+8r12r0+2r121-A2+2A3-A1-A-3,
γ=K0ss/Kss.
K0ss=23-r01-r0-3.
γ=0.53-r01-r0-1.
γ=0.5-sin2 θi1/2/cos θi1.

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