3D Printing of Micro-Optic Spiral Phase Plates for the Generation of Optical Vortex Beams

Heming Wei; Abhishek K. Amrithanath; Sridhar Krishnaswamy

doi:10.1109/LPT.2019.2903151

3D Printing of Micro-Optic Spiral Phase Plates for the Generation of Optical Vortex Beams

Heming Wei^*, Abhishek K. Amrithanath, Sridhar Krishnaswamy

^*Corresponding author for this work

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Optical vortex is a type of structured beam with helical phase wavefronts that carry orbital-angular momentum (OAM) with different topological charge numbers. Optical vortex beams are of use in a wide range of areas ranging from communications to biomedical applications. In this letter, we demonstrate that microscale polymer spiral phase plates (SPPs) with different topological charges can be fabricated through two-photon polymerization by femtosecond 3D direct laser writing. These micro-optical SPPs can modify input light beams carrying no OAM into optical vortex beams carrying an OAM of lh per photon. Intensity patterns and interferograms of the vortex beams are experimentally obtained, showing good agreement with numerical simulations. The two-photon direct laser writing technique with a high resolution of 100 nm enables easy fabrication of micro-optic devices such as SPPs with broad applications in mesoscale photonic devices.

Original language	English (US)
Article number	8660645
Pages (from-to)	599-602
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	31
Issue number	8
DOIs	https://doi.org/10.1109/LPT.2019.2903151
State	Published - Apr 15 2019

Keywords

Optical vortices
micro-optics
spiral phase plate
three-dimensional lithography
two-photon polymerization

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1109/LPT.2019.2903151

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title = "3D Printing of Micro-Optic Spiral Phase Plates for the Generation of Optical Vortex Beams",

abstract = "Optical vortex is a type of structured beam with helical phase wavefronts that carry orbital-angular momentum (OAM) with different topological charge numbers. Optical vortex beams are of use in a wide range of areas ranging from communications to biomedical applications. In this letter, we demonstrate that microscale polymer spiral phase plates (SPPs) with different topological charges can be fabricated through two-photon polymerization by femtosecond 3D direct laser writing. These micro-optical SPPs can modify input light beams carrying no OAM into optical vortex beams carrying an OAM of lh per photon. Intensity patterns and interferograms of the vortex beams are experimentally obtained, showing good agreement with numerical simulations. The two-photon direct laser writing technique with a high resolution of 100 nm enables easy fabrication of micro-optic devices such as SPPs with broad applications in mesoscale photonic devices.",

keywords = "Optical vortices, micro-optics, spiral phase plate, three-dimensional lithography, two-photon polymerization",

author = "Heming Wei and Amrithanath, {Abhishek K.} and Sridhar Krishnaswamy",

note = "Funding Information: Manuscript received January 11, 2019; revised February 8, 2019; accepted March 1, 2019. Date of publication March 5, 2019; date of current version March 27, 2019. This work was supported by the Office of Naval Research under Grant N00014-16-1-3021 and Grant N00014-15-12935. (Corresponding author: Heming Wei.) The authors are with the Department of Mechanical Engineering, Center for Smart Structures and Materials, Northwestern University, Evanston, IL 60208 USA (e-mail: hmwei@northwestern.edu; abhishekamrithanath2020@u.northwestern.edu; sridhar.krishnaswamy@ northwestern.edu). Publisher Copyright: {\textcopyright} 2019 IEEE.",

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N1 - Funding Information: Manuscript received January 11, 2019; revised February 8, 2019; accepted March 1, 2019. Date of publication March 5, 2019; date of current version March 27, 2019. This work was supported by the Office of Naval Research under Grant N00014-16-1-3021 and Grant N00014-15-12935. (Corresponding author: Heming Wei.) The authors are with the Department of Mechanical Engineering, Center for Smart Structures and Materials, Northwestern University, Evanston, IL 60208 USA (e-mail: hmwei@northwestern.edu; abhishekamrithanath2020@u.northwestern.edu; sridhar.krishnaswamy@ northwestern.edu). Publisher Copyright: © 2019 IEEE.

PY - 2019/4/15

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N2 - Optical vortex is a type of structured beam with helical phase wavefronts that carry orbital-angular momentum (OAM) with different topological charge numbers. Optical vortex beams are of use in a wide range of areas ranging from communications to biomedical applications. In this letter, we demonstrate that microscale polymer spiral phase plates (SPPs) with different topological charges can be fabricated through two-photon polymerization by femtosecond 3D direct laser writing. These micro-optical SPPs can modify input light beams carrying no OAM into optical vortex beams carrying an OAM of lh per photon. Intensity patterns and interferograms of the vortex beams are experimentally obtained, showing good agreement with numerical simulations. The two-photon direct laser writing technique with a high resolution of 100 nm enables easy fabrication of micro-optic devices such as SPPs with broad applications in mesoscale photonic devices.

AB - Optical vortex is a type of structured beam with helical phase wavefronts that carry orbital-angular momentum (OAM) with different topological charge numbers. Optical vortex beams are of use in a wide range of areas ranging from communications to biomedical applications. In this letter, we demonstrate that microscale polymer spiral phase plates (SPPs) with different topological charges can be fabricated through two-photon polymerization by femtosecond 3D direct laser writing. These micro-optical SPPs can modify input light beams carrying no OAM into optical vortex beams carrying an OAM of lh per photon. Intensity patterns and interferograms of the vortex beams are experimentally obtained, showing good agreement with numerical simulations. The two-photon direct laser writing technique with a high resolution of 100 nm enables easy fabrication of micro-optic devices such as SPPs with broad applications in mesoscale photonic devices.

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3D Printing of Micro-Optic Spiral Phase Plates for the Generation of Optical Vortex Beams

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