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  • Title: An ultrasonic transducer for second harmonic imaging using a LiNbO3 plate with a local ferroelectric inversion layer.
    Author: Nakamura K, Fukazawa K, Yamada K, Saito S.
    Journal: IEEE Trans Ultrason Ferroelectr Freq Control; 2006 Mar; 53(3):651-5. PubMed ID: 16555775.
    Abstract:
    A new lithium niobate (LiNbO3) transducer of separated transmitter-receiver configuration is proposed for application to second harmonic imaging in a high-frequency range. In this transducer, a domain-inverted layer of half the plate thickness is formed selectively by Ti-diffusion and heat treatment in the central part of a LiNbO3 plate. The uniformly polarized surrounding region is used as the transmitter that will generate the fundamental wave component. A transducer with the transmission frequency of 50 MHz and the reception frequency of 100 MHz is fabricated using a 36 degrees rotated Y-cut LiNbO3 plate, and its performance is demonstrated.
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