US
Post date: Jan 12, 2013 11:12:26 AM
Talks and Discussions in US in January 2013.
(1) Tuesday 15 January 2013, University of Connecticut
Optical security based on optical near-field processes
Makoto Naruse, Naoya Tate, and Motoichi Ohtsu
(2) Wednesday 16 January 2013, Princeton University
Information Systems based on Optical Near-Field Processes at the Nanoscale
Makoto Naruse, Naoya Tate, Masashi Aono, and Motoichi Ohtsu
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(1) Tuesday 15 January 2013, University of Connecticut
Optical security based on optical near-field processes
Makoto Naruse1,2, Naoya Tate2,3, and Motoichi Ohtsu2,3
1 National Institute of Information and Communications Technology, 4-2-1 Nukui-kita, Koganei, Tokyo 184-8795, Japan
2 Nanophotonics Research Center, School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
3 Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
Abstract
Optics has been playing crucial roles in security applications ranging from authentication and watermarks to anti-counterfeiting. However, conventional security technologies in use today have been facing increasingly stringent demands to safeguard against threats such as counterfeiting of holograms, requiring innovative physical principles and technologies to overcome their limitations. Nanophotonics, which utilizes interactions between light and matter at the nanometer scale via optical near-field interactions, can break through the diffraction limit of conventional propagating light. Moreover, nanophotonics has some unique physical attributes, such as localized optical energy transfer and the hierarchical nature of optical near-field interactions, which pave the way for novel security functionalities. This talk reviews physical principles and describes some experimental demonstrations of systems based on nanophotonics, with respect to security applications such as tamper resistance against non-invasive and invasive attacks, hierarchical information retrieval, hierarchical holograms, authentication, and traceability.
(2) Wednesday 16 January 2013, Princeton University
Information Systems based on Optical Near-Field Processes at the Nanoscale
Makoto Naruse1,2, Naoya Tate2,3, Masashi Aono4, and Motoichi Ohtsu2,3
1. Photonic Network Research Institute, National Institute of Information and Communications Technology, 4-2-1 Nukui-kita, Koganei, Tokyo 184-8795, Japan
2. Nanophotonics Research Center, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
3. Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
4. RIKEN Advanced Science Institute, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
Abstract
Nanophotonics has been extensively studied with the aim of unveiling and exploiting light?matter interactions that occur at a scale below the diffraction limit of light, and recent progress made in experimental technologies?both in nanomaterial fabrication and characterization?is driving further advancements in the field. From the viewpoint of information, on the other hand, novel architectures, design and analysis principles, and even novel computing paradigms should be considered so that we can fully benefit from the potential of nanophotonics. This talk will briefly review information physics aspects of nanophotonics. More specifically, we present some fundamental and emergent information properties that stem from optical excitation transfer mediated by optical near-field interactions and the hierarchical properties inherent in optical near-fields. We theoretically and experimentally investigated aspects such as unidirectional signal transfer, energy efficiency, and networking effects, as well as applications such as optical securities. A stochastic analysis of light-assisted material formation is also mentioned, where an information-based approach provides a deeper understanding of the phenomena involved, such as self-organization. Furthermore, the spatio-temporal dynamics of optical excitation transfer and its inherent stochastic attributes are utilized for solution searching, paving the way to a novel computing paradigm that exploits coherent and dissipative processes in nanophotonics.
