The University of Southampton
University of Southampton Institutional Repository

Some initial results with acoustic superlattice transducers made by domain inversion of LiNbO3

Some initial results with acoustic superlattice transducers made by domain inversion of LiNbO3
Some initial results with acoustic superlattice transducers made by domain inversion of LiNbO3
Conventional acoustic transducers for acousto-optic devices are typically made by bonding a plate of piezoelectric material such as LiNbO3 to the crystal or glass in which the acousto-optic interaction is to take place. The plate is then thin lapped and polished down to the required thickness, typically of the order of half an acoustic wavelength. While these transducers work well with many applications, it is possible to make acoustic transducers by a very different method, using electrically induced domain inversion in ferroelectrics. In these "acoustic superlattice transducers", the resonant frequency is no longer controlled by the overall physical dimensions of the transducer but by the period of the domain inverted regions. These are in turn defined by a photolithographic technique. Such transducers can be configured in many different ways to produce e.g. shear, longitudinal and Rayleigh waves, and in addition open the possibility to a "bondless" acousto-optic device in which the transducer and acousto-optic interaction medium are one and the same. One result of this is that the bandwidth of the resulting devices is potentially greater. We present some preliminary results demonstrating transducers fabricated in this material, and discuss some of the theory of operation.
Gnewuch, H.
bb752678-6981-4d39-adc7-db6efde25d33
Zayer, N.
76080504-0bb3-4150-92c8-fa6e49d387be
Pannell, C.N.
002fadf4-f97e-4732-b171-73ed7563ee18
Ross, G.W.
e881119e-2126-442e-a24d-506dac48a4a4
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Gnewuch, H.
bb752678-6981-4d39-adc7-db6efde25d33
Zayer, N.
76080504-0bb3-4150-92c8-fa6e49d387be
Pannell, C.N.
002fadf4-f97e-4732-b171-73ed7563ee18
Ross, G.W.
e881119e-2126-442e-a24d-506dac48a4a4
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6

Gnewuch, H., Zayer, N., Pannell, C.N., Ross, G.W. and Smith, P.G.R. (1999) Some initial results with acoustic superlattice transducers made by domain inversion of LiNbO3. Institute of Physics Meeting: Acousto-Optic Interactions Components and Techniques.

Record type: Conference or Workshop Item (Paper)

Abstract

Conventional acoustic transducers for acousto-optic devices are typically made by bonding a plate of piezoelectric material such as LiNbO3 to the crystal or glass in which the acousto-optic interaction is to take place. The plate is then thin lapped and polished down to the required thickness, typically of the order of half an acoustic wavelength. While these transducers work well with many applications, it is possible to make acoustic transducers by a very different method, using electrically induced domain inversion in ferroelectrics. In these "acoustic superlattice transducers", the resonant frequency is no longer controlled by the overall physical dimensions of the transducer but by the period of the domain inverted regions. These are in turn defined by a photolithographic technique. Such transducers can be configured in many different ways to produce e.g. shear, longitudinal and Rayleigh waves, and in addition open the possibility to a "bondless" acousto-optic device in which the transducer and acousto-optic interaction medium are one and the same. One result of this is that the bandwidth of the resulting devices is potentially greater. We present some preliminary results demonstrating transducers fabricated in this material, and discuss some of the theory of operation.

Full text not available from this repository.

More information

e-pub ahead of print date: 12 May 1999
Venue - Dates: Institute of Physics Meeting: Acousto-Optic Interactions Components and Techniques, 1999-05-12

Identifiers

Local EPrints ID: 76527
URI: https://eprints.soton.ac.uk/id/eprint/76527
PURE UUID: d71582f2-f156-4704-ae36-b0c21a7ca63c

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:39

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×