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Design, fabrication, and evaluation of a multilevel spiral-phase Fresnel zone plate for optical trapping
Anand Vijayakumar,
Published in OSA - The Optical Society
2012
Volume: 51
   
Issue: 25
Pages: 6038 - 6044
Abstract
A compact optics configuration for the generation of donut beams for trapping atoms at the micrometer scale using a multilevel spiral-phase Fresnel zone plate (FZP) and a semiconductor laser is proposed. A FZP is designed and a multilevel spiral phase is integrated into it. A spiral-phase FZP with a radius of 1 mm and with more than 1300 half-period zones is designed with multiple angular levels for integer and fractional topological charges, and the device is fabricated using electron-beam lithography direct writing. The performance of the device is evaluated, and the generation of symmetric and asymmetric donut beams is successfully demonstrated. © 2012 Optical Society of America.
About the journal
JournalData powered by TypesetApplied Optics
PublisherData powered by TypesetOSA - The Optical Society
ISSN1559128X
Impact Factor1.230
Open AccessNo
Citation Styleunsrt
Sherpa RoMEO Archiving PolicyGreen
Concepts (8)
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    Atom lasers
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    ELECTRON BEAM LITHOGRAPHY DIRECT WRITINGS
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    FRESNEL ZONE PLATE
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    Micrometer scale
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    OPTICALTRAPPING
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    SPIRAL PHASE
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    TOPOLOGICAL CHARGES
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    Electron beam lithography