Abstract

A radially polarized beam with an annular intensity pattern was generated through a second-harmonic-generation process by focusing an azimuthally polarized Ti:sapphire pulsed laser beam to a c-cut β-barium borate (BBO) crystal. The annular intensity pattern of the second-harmonic wave had a nearly sixfold symmetry as a result of the nonlinear susceptibility tensor of the BBO crystal. The width of the annulus was as narrow as less than 1/40th of its radius.

© 2009 Optical Society of America

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References

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2008 (1)

2007 (3)

2006 (2)

2004 (1)

2003 (1)

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

2000 (1)

1998 (1)

P. Becker, Adv. Mater. 10, 979 (1998).
[CrossRef]

1965 (1)

J. E. Midwinter and J. Warner, Br. J. Appl. Phys. 16, 1135 (1965).
[CrossRef]

1872 (1)

L. Rayleigh, Mon. Not. R. Astron. Soc. 33, 59 (1872).

Baida, F.

Bainier, C.

Becker, P.

P. Becker, Adv. Mater. 10, 979 (1998).
[CrossRef]

Bisson, J. -F.

Brown, T. G.

Choudhury, A.

Courjon, D.

Dorn, R.

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

Grosjean, T.

Kawakami, S.

Kawauchi, H.

Kozawa, Y.

Leuchs, G.

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

Li, J.

Midwinter, J. E.

J. E. Midwinter and J. Warner, Br. J. Appl. Phys. 16, 1135 (1965).
[CrossRef]

Quabis, S.

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

Rayleigh, L.

L. Rayleigh, Mon. Not. R. Astron. Soc. 33, 59 (1872).

Sato, S.

Sato, T.

Senatsky, Yu.

Sheppard, C. J. R.

Ueda, K.

Warner, J.

J. E. Midwinter and J. Warner, Br. J. Appl. Phys. 16, 1135 (1965).
[CrossRef]

Yonezawa, K.

Youngworth, K. S.

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Figures (4)

Fig. 1
Fig. 1

Schematic of the experimental setup. An arrow in the cross-sectional view of a segmented half-wave-plate shows the direction of the fast axis of each wave plate.

Fig. 2
Fig. 2

Intensity patterns of the second-harmonic wave generated from a c-cut BBO crystal by a Ti:sapphire pulsed laser beams with (a) azimuthal and (b) radial polarization. (c) is a sketch of (a), indicating an intensity pattern and an instantaneous electric field by arc and arrow, respectively.

Fig. 3
Fig. 3

Intensity patterns of the second-harmonic wave from a c-cut BBO crystal by a Ti:sapphire pulsed laser beams with azimuthal polarization. (a) is the total intensity pattern and (b)–(d) are the intensity patterns after passing through a linear polarizer. Each arrow indicates the direction of the polarizer.

Fig. 4
Fig. 4

Variation of the annulus of second-harmonic wave as the position of a screen is moved. (a)–(d) intensity patterns, (e) the radius of the annulus plotted as a function of the distance from the focal point.

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