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Title: Generation of radially polarized beam with a segmented spiral varying retarder
Authors: Lai, W.J.
Lim, B.C.
Phua, P.B.
Tiaw, K.S.
Teo, H.H.
Hong, M.H. 
Issue Date: 29-Sep-2008
Citation: Lai, W.J., Lim, B.C., Phua, P.B., Tiaw, K.S., Teo, H.H., Hong, M.H. (2008-09-29). Generation of radially polarized beam with a segmented spiral varying retarder. Optics Express 16 (20) : 15694-15699. ScholarBank@NUS Repository.
Abstract: We convert a linearly polarized Gaussian beam into a radially polarized doughnut beam with an eight-segment spirally varying retarder (SVR) at wavelength of 808 nm. The SVR is designed based on the linear birefringence of α-barium borate (α-BBO) crystal and fabricated using a dry etching process. Radially polarized light of high purity (> 96% at farfield distribution) was generated experimentally using the segmented SVR positioned between two quarter waveplates with orthogonal slow axes. The emergent polarization can be switched between radially and azimuthally polarized cylindrical vector beams with a pair of half-wave plates. © 2008 Optical Society of America.
Source Title: Optics Express
ISSN: 10944087
DOI: 10.1364/OE.16.015694
Appears in Collections:Staff Publications

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