All Outputs (56)

Thin-film transducers for the detection and imaging of Brillouin oscillations in transmission on cultured cells (2015)
Journal Article

Mechanical imaging and characterisation of biological cells has been a subject of interest for the last twenty years. Ultrasonic imaging based on the scanning acoustic microscope (SAM) and mechanical probing have been extensively reported. Large acou... Read More about Thin-film transducers for the detection and imaging of Brillouin oscillations in transmission on cultured cells.

Thin-film optoacoustic transducers for the subcellular Brillouin oscillation imaging of individual biological cells (2015)
Journal Article

Mechanical characterisation and imaging of biological tissue has piqued interest in the applicability to cell and tissue biology. One method, based on detection of Brillouin oscillations, has already lead to demonstrations on biological cells using u... Read More about Thin-film optoacoustic transducers for the subcellular Brillouin oscillation imaging of individual biological cells.

Highly sensitive optical fibre long period grating biosensor anchored with silica core gold shell nanoparticles (2015)
Journal Article

An optical fibre long period grating (LPG), modified with a coating of silica core gold shell (SiO2:Au) nanoparticles (NPs) deposited using the layer-by-layer method, was employed for the development of a biosensor. The SiO2:Au NPs were electrostatic... Read More about Highly sensitive optical fibre long period grating biosensor anchored with silica core gold shell nanoparticles.

Facile approach to generating polymeric nanoarrays containing populations of nanoparticles (2015)
Journal Article

The production of nanoarrays containing a population of entrapped, heterogeneous nanoparticles is reported. The nanoarray consists of a nanoporous film with pores of diameter 60-180 nm, formed from the phase separation of two immiscible polymers: pol... Read More about Facile approach to generating polymeric nanoarrays containing populations of nanoparticles.

Optically excited nanoscale ultrasonic transducers (2015)
Journal Article

© 2015 Acoustical Society of America. In order to work at higher ultrasonic frequencies, for instance, to increase the resolution, it is necessary to fabricate smaller and higher frequency transducers. This paper presents an ultrasonic transducer cap... Read More about Optically excited nanoscale ultrasonic transducers.

Widefield two laser interferometry (2014)
Journal Article

A novel system has been developed that can capture the wide- field interference pattern generated by interfering two independent and incoherent laser sources. The interferograms are captured using a custom CMOS modulated light camera (MLC) which is c... Read More about Widefield two laser interferometry.

Determination of the acoustoelastic coefficient for surface acoustic waves using dynamic acoustoelastography: An alternative to static strain (2014)
Journal Article

Spatially resolved acoustic spectroscopy for rapid imaging of material microstructure and grain orientation (2014)
Journal Article

Measuring the grain structure of aerospace materials is very important to understand their mechanical properties and in-service performance. Spatially resolved acoustic spectroscopy is an acoustic technique utilizing surface acoustic waves to map the... Read More about Spatially resolved acoustic spectroscopy for rapid imaging of material microstructure and grain orientation.

Sound of nano (2013)
Journal Article

Ultrasound is widely used for imaging, measurement and diagnostics in the MHz region and is perhaps most familiar as a medical or non-destructive imaging or measurement tool. In the MHz frequency range the wavelength is typically measured in microns... Read More about Sound of nano.

Determination of crystallographic orientation of large grain metals with surface acoustic waves (2012)
Journal Article

A previously described laser ultrasonic technique known as spatially resolved acoustic spectroscopy (SRAS) can be used to image surface microstructure, using the local surface acoustic wave (SAW) velocity as a contrast mechanism. It is shown here tha... Read More about Determination of crystallographic orientation of large grain metals with surface acoustic waves.

Ultrastable heterodyne interferometer system using a CMOS modulated light camera (2012)
Journal Article

A novel ultrastable widefield interferometer is presented. This uses a modulated light camera (MLC) to capture and stabilise the interferogram in the widefield heterodyne interferometer. This system eliminates the contribution of piston phase to the... Read More about Ultrastable heterodyne interferometer system using a CMOS modulated light camera.

Widefield heterodyne interferometry using a custom CMOS modulated light camera (2011)
Journal Article

In this paper a method of taking widefield heterodyne inter- ferograms using a prototype modulated light camera is described. This custom CMOS modulated light camera (MLC) uses analogue quadrature demodulation at each pixel to output the phase and am... Read More about Widefield heterodyne interferometry using a custom CMOS modulated light camera.

Widefield ultrastable heterodyne interferometry using a custom CMOS modulated light camera (2011)
Conference Proceeding

A method of detecting optical heterodyne interference fringes using a custom CMOS modulated light camera array has been developed. Widefield phase images are generated using quadrature demodulation and are kept stable using a feedback system. © 2011... Read More about Widefield ultrastable heterodyne interferometry using a custom CMOS modulated light camera.

CHOTs optical transducers (2011)
Journal Article

Laser ultrasonics conventionally use direct absorption in the sample to generate ultrasound and monitor the sample to detect the ultrasound. However, in some circumstances there are significant advantages to using an optical transducer - a device to... Read More about CHOTs optical transducers.

The design and characterisation of an optical VLSI processor for real time centroid detection (2002)
Journal Article

The integration of photo-detectors onto a standard CMOS integrated circuit is presented. This device provides the optical front end for a real time centroid detection system to be used as part of a larger system for implementing a Shack-Hartmann wave... Read More about The design and characterisation of an optical VLSI processor for real time centroid detection.

The Design of a Real Time VLSI Optical Centroid Processor (2002)
Conference Proceeding

A real time VLSI optical centroid processor has been developed as part of a larger Shack-Hartmann wavefront sensor system for applications in adaptive optics. The implementation of the optical centroid detection system was demonstrated successfully u... Read More about The Design of a Real Time VLSI Optical Centroid Processor.