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Nanophotonic code embedded in embossed hologram for hierarchical information retrieval
Naoya Tate1, Makoto Naruse, Takashi Yatsui
1Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-8656, Japan. tate@nanophotonics.t.u-tokyo.ac.jp
Optics Express
|April 15, 2010
Summary
This study introduces a hierarchical hologram capable of storing information in both far-field and near-field optical interactions. This novel approach embeds a nanophotonic code within a conventional hologram for advanced data retrieval.
Area of Science:
- Optics and Photonics
- Nanotechnology
- Holography
Background:
- Conventional holograms provide optical far-field imaging.
- Optical near-fields offer access to nanometric structures for advanced information encoding.
- Hierarchical holography combines both far-field and near-field information retrieval.
Purpose of the Study:
- To propose and demonstrate a hierarchical hologram embedding a nanophotonic code.
- To investigate the polarization dependence in retrieving the embedded code.
- To present the fabrication and optical characterization of a prototype hierarchical hologram.
Main Methods:
- Numerical simulations of light-matter interactions at the nanoscale.
- Fabrication of embossed hierarchical holograms.
- Optical characterization using near-field and far-field techniques.
- Analysis of polarization-dependent code retrieval.
Main Results:
- Successful embedding of a nanophotonic code within a hierarchical hologram.
- Demonstration of code retrieval via optical near-field interactions.
- Observation of significant polarization dependence in the retrieval process.
- Validation of the hierarchical hologram concept through experimental results.
Conclusions:
- Hierarchical holograms offer a dual-mode information storage and retrieval system.
- Nanophotonic codes embedded in holograms are accessible through optical near-field interactions.
- The proposed technology shows potential for advanced optical data storage and security applications.
