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Tate Naoya Last modified date:2024.06.03

Graduate School
Undergraduate School

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Naoya TATE .net .
Academic Degree
Ph.D. degrees in information science
Country of degree conferring institution (Overseas)
Field of Specialization
Nanophotonic information processing
Total Priod of education and research career in the foreign country
Research Interests
  • Development of Nano-photonic information systems and devices
    keyword : Information photonics, Nanophotonics
Academic Activities
1. Naoya Tate, "Nanophotonics-Based Self-optimization for Macro-optical Applications" in Nanophotonic Information Physics: Nanointelligence and Nanophotonic Computing, Springer, 2017.01.
1. T. Ohteki, S. Sakai, N. Tate, Nano-Photonic Metrics: Fundamentals and Experimental Demonstration, Photonics, 10.3390/photonics9080551, 9(8), 551, 1-7, 2022.08, As the popularity of Internet of Things (IoT) increases, there is a considerable demand for the improvement of physical security, owing to the increase in edge devices. However, fabrication and measurement techniques used by attackers are also improving continuously, and hence, it is becoming increasingly difficult to ensure the security of each device using conventional approaches. To counter variable attacks in this context, the concept of nano-photonic metrics has been proposed, which is based on a functional collaboration between existing physical security and near-field optical techniques. In this approach, the optical signals obtained from optical near-field interactions, which are induced between the target with nano-scale structures and the tip of the scanning probe as the reader, are defined as the unique features of each device to be authenticated. When attackers attempt spoofing, they must fabricate not only clones of original nano-scale structures but also the scanning probe; otherwise, they cannot impersonate regular users. Moreover, the estimation of the nano-scale structures of the target and the characteristics of the probe is typically a complex, inverse problem. Therefore, a novel authentication is expected to be performed. In this paper, we report the results of the quantitative evaluations of the performance from the viewpoint of physical security and the experimental verification of the practicality of the proposed approach..
2. Naoya Tate, Tadashi Kawazoe, Wataru Nomura, Motoichi Ohtsu, Shunsuke Nakashima, Development of Zinc Oxide Spatial Light Modulator for High-Yield Speckle Modulation, IEICE Transactions on Electronics, 10.1587/transele.E99.C.1264, E99-C, 11, 1264-1270, 2016.11, In order to realize high-yield speckle modulation, we developed a novel spatial light modulator using zinc oxide single crystal doped with nitrogen ions. The distribution of dopants was optimized to induce characteristic optical functions by applying an annealing method developed by us. The device is driven by a current in the in-plane direction, which induces magnetic fields. These fields strongly interact with the doped material, and the spatial distribution of the refractive index is correspondingly modulated via external control. Using this device, we experimentally demonstrated speckle modulation, and we discuss the quantitative superiority of our approach..
3. Naoya Tate, Makoto Naruse, Tsutomu Matsumoto, Morihisa Hoga, Yasuyuki Ohyagi, Shumpei Nishio, Wataru Nomura, Motoichi Ohtsu, Non-scanning optical near-field microscopy for nanophotonic security, Applied Physics A: Materials Science & Processing, 121, 4, 1383-1387, 2015.07, We propose a novel method for observing and utilizing nanometrically fluctuating signals due to optical near-field interactions between a probe and target in near-field optical microscopy. Based on a hierarchical structure of the interactions, it is possible to obtain signals that represent two-dimensional spatial patterns without requiring any scanning process. Such signals reveal individual features of each target, and these features, when appropriately extracted and defined, can be used in security applications—an approach that we call nanophotonic security. As an experimental demonstration, output signals due to interactions between a SiO2 probe and Al nanorods were observed by using near-field optical microscopy at a single readout point, and these signals were quantitatively evaluated using an algorithm that we developed for extracting and defining features that can be used for security applications..
Membership in Academic Society
  • The Laser Society of Japan
  • The Optical Society of Japan
  • Institute of Electrical and Electronics Engineers
  • The Optical Society
  • The Japan Society of Applied Physics
  • Nanophotonic code embedded in embossed hologram for hierarchical information retrieval
  • Nanophotonic code embedded in embossed hologram for hierarchical information retrieval
  • Hierarchical Hologram based on Nanophotonic Coding