Optical image encryption with an ultrathin nonlinear metasurface

Walter, Felicitas1; Li, Guixin2; Meier, Cedrik1; Zhang, Shuang3; Zentgraf, Thomas1

10.1109/CLEOE-EQEC.2017.8087656

2017

978-1-5090-6737-4

2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)

Part F81-EQEC 2017

1-1

25-29 June 2017

Munich, Germany

345 E 47TH ST, NEW YORK, NY 10017 USA

IEEE

Summary form only given. Recently, the concept of the geometric Pancharatnam-Berry (P-B) phase has been successfully extended to optical metasurfaces operating in the nonlinear regime1-3. It was shown that the nonlinear geometric P-B phase of each meta-atom is determined by the spin of the fundamental wave, the spin of the nonlinear signal, and the order of the nonlinear process1. By manipulating the interferences of SHG waves from two meta-atoms within one unit-cell, we demonstrate a grey-scale image encryption in the nonlinear signal. We successfully demonstrate spatially variant SHG for real space image generation directly from the metasurface interface by controlling the phase difference of the nonlinear polarization between neighboring meta-atoms.

Nonlinear optics Optical device fabrication Optical harmonic generation Optical imaging Optical polarization Polarization Encryption

其他

英语

CPCI-S ; EI

Engineering ; Optics

Engineering, Electrical & Electronic ; Optics

WOS:000432564601417

20180104605485

Geometrical optics

Light/Optics:741.1

Web of Science

1.Univ Paderborn, Dept Phys, Warburger Str 100, D-33098 Paderborn, Germany
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, 1088 Xueyuan Ave, Shenzhen 518055, Peoples R China
3.Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

Walter, Felicitas,Li, Guixin,Meier, Cedrik,et al. Optical image encryption with an ultrathin nonlinear metasurface[C]. 345 E 47TH ST, NEW YORK, NY 10017 USA:IEEE,2017:1-1.