Polarization-multiplexed phase-only diffractive optical elements with subwavelength structures are proposed and fabricated. The differences among the phase modulations result from the differences among the effective indices exhibited in the subwavelength structures with various filling factors and surface profiles, and the phase retardations are obtained by the relief depth of the structures. The polarization-selective property is achieved by the polarization dependence of the effective indices exhibited in the one-dimensional subwavelength structures and the polarization independence exhibited in the two-dimensional structures. Additionally, the polarization contrast of our polarization-multiplexed elements, defined as the cross talk between the two polarization incidences, is independent of the relief depth. The principle of the polarization multiplexing by use of the subwavelength structures is described, and the fabrication results for the polarization-multiplexed computer-generated holograms are demonstrated.

© 2002 Optical Society of America

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2000 (1)

1999 (1)

1997 (1)

1996 (2)

1995 (2)

1994 (1)

1992 (1)

1990 (1)

1986 (1)

1956 (1)

S. M. Rytov, “Electromagnetic properties of a finely stratified medium,” Sov. Phys. JETP 2, 466–475 (1956).

Azzam, R. M. A.

Bräuer, R.

Bryngdahl, O.

Chen, F. T.

Cheng, C.

Craighead, H. G.

Davidson, N.

Fainman, Y.

Ford, J. E.

Friesem, A. A.

Habraken, S.

Hasman, E.

Huang, Y.

Ichioka, Y.

Kato, M.

Kirk, A.

Kley, E. B.

Konishi, T.

Kostuk, R. K.

Lion, Y.

Michaux, O.

Morlion, B.

Nieuborg, N.

Renotte, Y.

Rytov, S. M.

S. M. Rytov, “Electromagnetic properties of a finely stratified medium,” Sov. Phys. JETP 2, 466–475 (1956).

Scherer, A.

Schnabel, B.

Sun, P.

Takahara, K.

Thienpont, H.

Tyan, R.

Veretennicoff, I.

Wyrowski, F.

Xu, F.

Yotsuya, T.

Yu, W.

Zeitner, U. D.

Appl. Opt. (7)

Opt. Lett. (4)

Sov. Phys. JETP (1)

S. M. Rytov, “Electromagnetic properties of a finely stratified medium,” Sov. Phys. JETP 2, 466–475 (1956).

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Figures (5)

Fig. 1
Fig. 1

(a) One-dimensional and (b) two-dimensional subwavelength periodic gratings in an isotropic dielectric substrate.

Fig. 2
Fig. 2

Effective indices exhibited in the 1-D and the 2-D SWPSs relieved on the fused silica (n = 1.46) with period T = 0.679λ as a function of the filling factors.

Fig. 3
Fig. 3

Synthesized surface profiles for obtaining the desired phase modulations according to the polarization. (a) ϕ2 for both incidences, (b) ϕ1 for both incidences, (c) ϕ2 for vertical and ϕ1 for horizontal incidence, (d) ϕ2 for horizontal and ϕ1 for vertical incidence.

Fig. 4
Fig. 4

Scanning-electron-microscope photograph of the multiplexed CGH after etching process.

Fig. 5
Fig. 5

Reconstructed image captured by a camera when the fabricated multiplexed CGH is illuminated with (a) horizontal, (b) vertical, and (c) 45° incident light, where the wavelength λ = 0.633 µm.

Tables (1)

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Table 1 Filling Factors and Effective Indices for Fabrication of Polarization Multiplexed DOE in the Fused-Silica Substrate

Equations (5)

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