Hiding images with multi-color THz metasurfaces

We demonstrate a novel approach for encoding images using onto a metasurface design composed of resonant dipole based unit cells. This is accomplished by varying the conductivity of individual dipole, resulting in amplitude modulation of the transmitted THz beam. However, since only a narrow regime...

Full description

Saved in:
Bibliographic Details
Main Authors: Chanana, Ashish, Paulsen, Andrew, Nahata, Ajay
Format: Conference Proceeding
Language:English
Subjects:
Conductivity
Encoding
Image color analysis
Imaging
Ink
Modulation
Silver
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We demonstrate a novel approach for encoding images using onto a metasurface design composed of resonant dipole based unit cells. This is accomplished by varying the conductivity of individual dipole, resulting in amplitude modulation of the transmitted THz beam. However, since only a narrow regime of conductivity variation was used, the dipole array appears to be uniform visually. Thus, this offers an interesting approach for hiding information. Using one to three dipoles per unit cell, we experimentally demonstrate 9 level encoding of information using simple dipole and 64 (4 3 ) color encoding per bit with RGB color metasurface as demonstrated via THz imaging.
ISSN:2162-2035
DOI:10.1109/IRMMW-THz.2016.7758874