Hybrid Refractive-Diffractive Optical Vortex Microlens

We report a novel hybrid refractive-diffractive microlens combined with spiral phase for the generation of optical vortex, which is fabricated via femtosecond laser direct writing technology. The unique optical performance of focusing capability is demonstrated. At the focus position, the hollow foc...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 28; no. 21; pp. 2299 - 2302
Main Authors Tian, Zhen-Nan, Cao, Xiao-Wen, Yao, Wen-Gang, Li, Pei-Xin, Yu, Yan-Hao, Li, Gen, Chen, Qi-Dai, Sun, Hong-Bo
Format Journal Article
LanguageEnglish
Published IEEE 01.11.2016
Subjects
Femtosecond laser
hybrid refractive-diffractive
Laser beams
Lenses
microlens
Microoptics
Optical device fabrication
optical vortex
Optical vortices
Spirals
Ultrafast optics
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Summary:We report a novel hybrid refractive-diffractive microlens combined with spiral phase for the generation of optical vortex, which is fabricated via femtosecond laser direct writing technology. The unique optical performance of focusing capability is demonstrated. At the focus position, the hollow focus with different integer topological charges is investigated. Moreover, experimental results are supported by finite-element calculation. The novel microlens generating an optical vortex will fulfill important applications in optical manipulation, multistate information encoding, quantum communication, and computation, particularly in the compaction, integration, and simplification of optical vortex generation system.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2016.2591238