Design and fabrication of nanoscale ultrasonic transducers

R. Smith, A. Arca, X. Chen, L. Marques, M. Clark, J. Aylott, Michael Geoffrey Somekh

Research output: Journal article publicationConference articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

The development of nanometre sized ultrasonic transducers is important in both biological and industrial applications. The small size can be important in its own right or necessary in order to generate acoustic waves with nanometric wavelengths. Potential applications of nanotransducers range from embedded sensors through to sub optical wavelength acoustic imaging. In this paper we discuss the design and fabrication of nanoscale ultrasonic transducers. The transducers rely on optical and mechanical resonances, they can be used to generate and detect high frequency ultrasound in a sample. The mechanical and optical performance of the devices have been extensively modelled using both analytical techniques and finite element modelling. This allows the fine tuning of the design parameters to ensure optimised performance for the experimental configuration. The devices can be fabricated in a number of ways, we present one method for building these types of devices, a 'top down' approach where plate structures are built up and patterned using standard photolithographic techniques. This method produces nanoscale devices in one dimension only (the others being a few microns) but produces excellent devices for testing in situ and for comparison to the models as they are easy to handle and measure. Approaches for reducing the other dimensions to the nanoscale will also be considered.
Original languageEnglish
Article number12001
JournalJournal of Physics: Conference Series
Volume353
Issue number1
DOIs
Publication statusPublished - 1 Jan 2012
Externally publishedYes
Event10th Anglo-French Physical Acoustics Conference, AFPAC 2011 - Villa Clythia, Frejus, France
Duration: 19 Jan 201121 Jan 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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