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

Research output: Contribution to journalArticle

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 languageEnglish (US)
Article number8660645
Pages (from-to)599-602
Number of pages4
JournalIEEE Photonics Technology Letters
Volume31
Issue number8
DOIs
StatePublished - Apr 15 2019

Fingerprint

Microoptics
printing
Printing
Vortex flow
optics
vortices
Angular momentum
angular momentum
orbitals
Photons
photons
Photonic devices
light beams
microbalances
Lasers
lasers
Optical resolving power
Wavefronts
interferometry
polymerization

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

Cite this

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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.",
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3D Printing of Micro-Optic Spiral Phase Plates for the Generation of Optical Vortex Beams. / Wei, Heming; Amrithanath, Abhishek K.; Krishnaswamy, Sridhar.

In: IEEE Photonics Technology Letters, Vol. 31, No. 8, 8660645, 15.04.2019, p. 599-602.

Research output: Contribution to journalArticle

TY - JOUR

T1 - 3D Printing of Micro-Optic Spiral Phase Plates for the Generation of Optical Vortex Beams

AU - Wei, Heming

AU - Amrithanath, Abhishek K.

AU - Krishnaswamy, Sridhar

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Y1 - 2019/4/15

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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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