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High capacity nano-optical diffraction barcode tagging for biological and chemical applications

High capacity nano-optical diffraction barcode tagging for biological and chemical applications
High capacity nano-optical diffraction barcode tagging for biological and chemical applications
Here we describe a new method for encoding small beads which allows for non-contact reading. The tagging technique is based on fabricating a nano-structured pattern on the surface of the particle, which is only a few microns in size. The pattern is read by detecting the spatial distribution of laser light diffracted by the tag.

Encoding information on the tag therefore requires creating many different patterns, which can produce large numbers of unique distributions of diffracted light. In the simplest implementation, the pattern is a miniature diffraction grating, where information is coded in the pitch or spatial dimensions of the grating. The encoding capacity of such a tag can be greatly increased, up to million unique codes by fabricating tags with several overlapping gratings and up to 1012 codes by using two-dimensional diffraction.

In order to demonstrate this tagging concept, a chip library of chromium gratings was manufactured on a glass substrate using e-beam lithography. We have been able to demonstrate tags up to order three (containing three superimposed gratings) that are fully distinguishable by diffraction. This provides a capacity of about 68,000 distinguishable tags.
We have also created biologically compatible barcodes on SU8 photopolymer, patterned using photolithography.
diffraction, optical tagging, medical optics, biotechnology
Banu, S.
ccf7dbae-dce6-4c1e-ab40-860cc3aee72a
Birtwell, S.
b1d014b6-4286-49cf-925d-c33b409e4147
Chen, Y.
aa3aa967-2aa4-499c-9265-8e6a7e7fb9e5
Galitonov, G.
604cc0ec-21b4-459b-b378-eb01dc63de2b
Morgan, H.
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Zheludev, N.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Banu, S.
ccf7dbae-dce6-4c1e-ab40-860cc3aee72a
Birtwell, S.
b1d014b6-4286-49cf-925d-c33b409e4147
Chen, Y.
aa3aa967-2aa4-499c-9265-8e6a7e7fb9e5
Galitonov, G.
604cc0ec-21b4-459b-b378-eb01dc63de2b
Morgan, H.
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Zheludev, N.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Banu, S., Birtwell, S., Chen, Y., Galitonov, G., Morgan, H. and Zheludev, N. (2006) High capacity nano-optical diffraction barcode tagging for biological and chemical applications. Nano Science and Technology Institute Nanotech - Conference on Nano Electronics & Photonics, United States. 07 - 11 May 2006.

Record type: Conference or Workshop Item (Paper)

Abstract

Here we describe a new method for encoding small beads which allows for non-contact reading. The tagging technique is based on fabricating a nano-structured pattern on the surface of the particle, which is only a few microns in size. The pattern is read by detecting the spatial distribution of laser light diffracted by the tag.

Encoding information on the tag therefore requires creating many different patterns, which can produce large numbers of unique distributions of diffracted light. In the simplest implementation, the pattern is a miniature diffraction grating, where information is coded in the pitch or spatial dimensions of the grating. The encoding capacity of such a tag can be greatly increased, up to million unique codes by fabricating tags with several overlapping gratings and up to 1012 codes by using two-dimensional diffraction.

In order to demonstrate this tagging concept, a chip library of chromium gratings was manufactured on a glass substrate using e-beam lithography. We have been able to demonstrate tags up to order three (containing three superimposed gratings) that are fully distinguishable by diffraction. This provides a capacity of about 68,000 distinguishable tags.
We have also created biologically compatible barcodes on SU8 photopolymer, patterned using photolithography.

Full text not available from this repository.

More information

Published date: 9 May 2006
Venue - Dates: Nano Science and Technology Institute Nanotech - Conference on Nano Electronics & Photonics, United States, 2006-05-07 - 2006-05-11
Keywords: diffraction, optical tagging, medical optics, biotechnology

Identifiers

Local EPrints ID: 70984
URI: https://eprints.soton.ac.uk/id/eprint/70984
PURE UUID: 33e69e02-47a2-43e6-b59a-8a591834fd56
ORCID for H. Morgan: ORCID iD orcid.org/0000-0003-4850-5676
ORCID for N. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 11 Dec 2009
Last modified: 06 Jun 2018 13:09

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Contributors

Author: S. Banu
Author: S. Birtwell
Author: Y. Chen
Author: G. Galitonov
Author: H. Morgan ORCID iD
Author: N. Zheludev ORCID iD

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