Abstract

We show that, by adding a π-phase shift to one-half of a linearly polarized beam, the roles of the transversal and longitudinal field components of the focused beam are interchanged, resulting in better focusing of the longitudinal component in the direction perpendicular to the phase jump line. For this component the scheme produces a spot with FWHM >15% smaller than a spot generated with either linearly or radially polarized light for any NA. The scheme has a similar advantage when applied to circularly polarized light, and it holds for both a plane wave and a realistic case of a Gaussian incident beam. This technique may find applications when using recording media responsive to the longitudinal field only, particularly in read/write for optical storage where the resolution in one transverse dimension is most important.

© 2011 Optical Society of America

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2010

2008

2007

2006

2005

2004

S. F. Pereira and A. S. van de Nes, Opt. Commun. 234, 119 (2004).
[CrossRef]

N. Davidson and N. Bokor, Opt. Lett. 29, 1318 (2004).
[CrossRef] [PubMed]

2003

R. Dorn, S. Quabis, and G. Leuchs, Phys. Rev. Lett. 91, 233901 (2003).
[CrossRef] [PubMed]

I. Moshe, S. Jackel, and A. Meir, Opt. Lett. 28, 807 (2003).
[CrossRef] [PubMed]

2002

2001

L. E. Helseth, Opt. Commun. 191, 161 (2001).
[CrossRef]

N. Huse, A. Schonle, and S. W. Hell, J. Biomed. Opt. 6, 273 (2001).
[CrossRef] [PubMed]

1997

1959

B. Richards and E. Wolf, Proc. R. Soc. London Ser. A 253, 358 (1959).
[CrossRef]

Bainier, C.

Banzer, P.

Biener, G.

Bokor, N.

Bomzon, Z.

Cheng, K.

Courjon, D.

Davidson, N.

Dorn, R.

R. Dorn, S. Quabis, and G. Leuchs, Phys. Rev. Lett. 91, 233901 (2003).
[CrossRef] [PubMed]

Golub, I.

Grosjean, T.

Hasman, E.

Hell, S. W.

N. Huse, A. Schonle, and S. W. Hell, J. Biomed. Opt. 6, 273 (2001).
[CrossRef] [PubMed]

Helseth, L. E.

L. E. Helseth, Opt. Commun. 256, 435 (2005).
[CrossRef]

L. E. Helseth, Opt. Commun. 191, 161 (2001).
[CrossRef]

Huse, N.

N. Huse, A. Schonle, and S. W. Hell, J. Biomed. Opt. 6, 273 (2001).
[CrossRef] [PubMed]

Jackel, S.

Jin, G.

Jouravlev, M. V.

Kalosha, V.

Khonina, S. N.

Kim, K. S.

Kleiner, V.

Kozawa, Y.

Lerman, G. M.

Leuchs, G.

Levy, V.

Mason, D.

Meir, A.

Morris, G. M.

Moshe, I.

Pereira, S. F.

S. F. Pereira and A. S. van de Nes, Opt. Commun. 234, 119 (2004).
[CrossRef]

Peschel, U.

Quabis, S.

Richards, B.

B. Richards and E. Wolf, Proc. R. Soc. London Ser. A 253, 358 (1959).
[CrossRef]

Sales, T. R. M.

Sato, S.

Schonle, A.

N. Huse, A. Schonle, and S. W. Hell, J. Biomed. Opt. 6, 273 (2001).
[CrossRef] [PubMed]

Tan, Q.

van de Nes, A. S.

S. F. Pereira and A. S. van de Nes, Opt. Commun. 234, 119 (2004).
[CrossRef]

Volotovsky, S. G.

Wolf, E.

B. Richards and E. Wolf, Proc. R. Soc. London Ser. A 253, 358 (1959).
[CrossRef]

Zhou, Z.

J. Biomed. Opt.

N. Huse, A. Schonle, and S. W. Hell, J. Biomed. Opt. 6, 273 (2001).
[CrossRef] [PubMed]

J. Opt. Soc. Am. A

Opt. Commun.

L. E. Helseth, Opt. Commun. 256, 435 (2005).
[CrossRef]

L. E. Helseth, Opt. Commun. 191, 161 (2001).
[CrossRef]

S. F. Pereira and A. S. van de Nes, Opt. Commun. 234, 119 (2004).
[CrossRef]

Opt. Express

Opt. Lett.

Phys. Rev. Lett.

R. Dorn, S. Quabis, and G. Leuchs, Phys. Rev. Lett. 91, 233901 (2003).
[CrossRef] [PubMed]

Proc. R. Soc. London Ser. A

B. Richards and E. Wolf, Proc. R. Soc. London Ser. A 253, 358 (1959).
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Effect of a binary phase plate adding a π-phase shift on focusing of linearly polarized light.

Fig. 2
Fig. 2

Distribution of the E x and E Z fields with the smallest FWHM from Table 1: | E x | 2 for linearly polarized light (bold curve), | E z | 2 for radial polarization (dashed curve), and | E z | 2 for a scheme with a phase plate generating a π-phase shift (dotted curve).

Fig. 3
Fig. 3

Comparison of focused spot of modified linear polarization versus radial polarization focused z-component spots as a function of the NA for (a) a uniform and (b) a Gaussian incident beam with waist ω = R / 2 .

Fig. 4
Fig. 4

Misalignment effect on transverse distribution of | E z | 2 for a scheme with a phase plate: ideal case (dashed curve), a 10 λ perpendicular shift of the phase plate (solid curve), and a 10 ° error in its angular position (dotted curve).

Tables (1)

Tables Icon

Table 1 Spot Size for Focusing by an NA = 0.99 Lens for a Linearly Polarized Light (Top Row), for a Scheme with a Phase Plate Generating a π-Phase Shift (Second Row), for Radial Polarization (Third Row), and for Circular Polarization Without and With the Phase Plate (Last Two Rows) a

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