Publication result detail

Invited Article: Direct phase mapping of broadband Laguerre-Gaussian metasurfaces

FAßBENDER, A.; BABOCKÝ, J.; DVOŘÁK, P.; KŘÁPEK, V.; VAN DER LINDEN, S.

Original Title

Invited Article: Direct phase mapping of broadband Laguerre-Gaussian metasurfaces

English Title

Invited Article: Direct phase mapping of broadband Laguerre-Gaussian metasurfaces

Type

WoS Article

Original Abstract

We report on the fabrication of metasurface phase plates consisting of gold nanoantenna arrays that generate Laguerre-Gaussian modes from a circularly polarized Gaussian input beam. The corresponding helical phase profiles with radial discontinuities are encoded in the metasurfaces by the orientation of the nanoantennas. A commonpath interferometer is used to determine the orbital angular momentum of the generated beams. Additionally, we employ digital holography to record the detailed phase profiles of the Laguerre-Gaussian modes. This method allows a simple and direct quantitative comparison of the measured phase profiles of the generated Laguerre-Gaussian beams with the theoretically expected phase profiles. Experiments with different laser sources demonstrate the broadband operation of the metasurfaces

English abstract

We report on the fabrication of metasurface phase plates consisting of gold nanoantenna arrays that generate Laguerre-Gaussian modes from a circularly polarized Gaussian input beam. The corresponding helical phase profiles with radial discontinuities are encoded in the metasurfaces by the orientation of the nanoantennas. A commonpath interferometer is used to determine the orbital angular momentum of the generated beams. Additionally, we employ digital holography to record the detailed phase profiles of the Laguerre-Gaussian modes. This method allows a simple and direct quantitative comparison of the measured phase profiles of the generated Laguerre-Gaussian beams with the theoretically expected phase profiles. Experiments with different laser sources demonstrate the broadband operation of the metasurfaces

Keywords

Gaussian distribution, Nanoantennas

Key words in English

Gaussian distribution, Nanoantennas

Authors

FAßBENDER, A.; BABOCKÝ, J.; DVOŘÁK, P.; KŘÁPEK, V.; VAN DER LINDEN, S.

RIV year

2019

Released

01.11.2018

Publisher

AIP Publishing

ISBN

2378-0967

Periodical

APL Photonics

Volume

3

Number

11

State

United States of America

Pages from

110803-1

Pages to

110803-7

Pages count

7

URL

http://dx.doi.org/10.1063/1.5049368

Full text in the Digital Library

http://hdl.handle.net/11012/85365

Documents

Direct phase