Investigation of resonance enhancement through non-uniform piezoelectric polarization for information storage methodology

Christopher Hakoda; Cristian Pantea; Vamshi Chillara

doi:10.1117/12.2558801

22 April 2020 Investigation of resonance enhancement through non-uniform piezoelectric polarization for information storage methodology

Christopher Hakoda, Cristian Pantea, Vamshi Chillara

Author Affiliations +

Proceedings Volume 11376, Active and Passive Smart Structures and Integrated Systems XIV; 113761M (2020) https://doi.org/10.1117/12.2558801
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

Non-traditional information storage has become increasingly ubiquitous as a means of providing interactive, environment-specific information. Two popular examples of this are Optical Quick Response (QR) codes and Radio-Frequency Identification (RFID) tags, which are used in product tags, anti-theft systems, tamper-evident seals, logistics, etc. From a security point-of-view though, these two examples have unique drawbacks. Optical QR codes can be easily viewed and replicated because they are limited to the surface of objects, and RFID tags are prone to remote RFID skimming. With this in mind, we are investigating a PZT-based information storage method which has visibly indistinguishable features, is incompatible with skimming, and can be used with a QR-type encoding scheme. This information storage method involves a frequency-dependent array of transducers with engineered resonance profiles. In this proceedings, we investigate methods of engineering these resonance profiles for the case of a square PZT wafer. Specifically, we investigate the use of non-uniform poling to enhance specific resonances. Simulation results and a discussion of changes to the resonance characteristics resulting from non-uniform poling are included.

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Christopher Hakoda, Cristian Pantea, and Vamshi Chillara "Investigation of resonance enhancement through non-uniform piezoelectric polarization for information storage methodology", Proc. SPIE 11376, Active and Passive Smart Structures and Integrated Systems XIV, 113761M (22 April 2020); https://doi.org/10.1117/12.2558801

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