Open AccessBar code reader for the THz region
Author(s) -
Yasith Amarasinghe,
Hichem Guerboukha,
Yaseman Shiri,
Daniel M. Mittleman
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.428547
Subject(s) - barcode , bar (unit) , optics , strips , code (set theory) , computer science , encoding (memory) , terahertz radiation , computer hardware , physics , set (abstract data type) , artificial intelligence , meteorology , programming language , operating system
We demonstrate a bar code sensing system for the THz region using leaky parallel plate waveguide and an off-axis parabolic mirror. The bars of the bar code are made from metal with air as gaps between them. We use up to 6 bars in the barcode system which can store up to 64 bits. Because the system employs coherent detection, we can further increase the bit density by adding Teflon strips to the barcode, encoding information in both amplitude and phase delay. These bar codes can be manufactured easily and inexpensively, offering a versatile alternative to RFID tags.