Steven Hinckley | Edith Cowan University (original) (raw)

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Papers by Steven Hinckley

In this work, we show the ability to communicate wirelessly through solid structures using acoust... more In this work, we show the ability to communicate wirelessly through solid structures using acoustic signals. Wireless acoustic communications were used to communicate through both an aluminum panel and a Carbon Fiber Composite (CFC) panel. These media represent surface materials for aerospace structures. The acoustic communications signals were generated using a piezoelectric transducer, specifically a lead zirconate titanate (PZT) piezoceramic. The receiver used was a Fiber Bragg Grating (FBG) ultrasonic sensor. Surface coupled FBGs were used for both the aluminum and the CFC, and an embedded FBG was also used in the CFC. A reference PZT receiver was used for baseline comparison. In this paper, we present results showing the performance of the communications channels, and sample communications signals. Results are presented using both the aluminum and CFC panels as the communications medium. The frequency response, transfer function and transient response (at resonance) of the communications channels are shown. Due to the frequency response of the communications channel, PSK was chosen as the modulation method. Successful communication was achieved through the communications channels

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, May 1, 2002

ABSTRACT Polycrystalline CdS films, with thicknesses typically 20–180 nm, have been chemically de... more ABSTRACT Polycrystalline CdS films, with thicknesses typically 20–180 nm, have been chemically deposited on glass substrates using an ammonia–cadmium–thiourea reaction solution. Film elemental composition, thickness and microstructure have been examined using proton-induced X-ray emission, Rutherford backscattering and atomic force microscopy. Analysis indicates that the stability of the deposition temperature plays a critical role in CdS film growth and composition. Films deposited with high temperature stability (60±0.5°C) show a consistent 1:1 Cd:S atomic ratio for all stages of film growth, and have good substrate adhesion. Films deposited with lower temperature stability (60±4°C) show initial high S concentrations, followed by a rapid increase in Cd concentration, until a final 1.2:1 Cd:S ratio is achieved. A mechanism is proposed to explain this difference in film composition and properties.

InTech eBooks, Jan 8, 2011

Surface Science, Dec 1, 1980

ABSTRACT

2002 Conference on Optoelectronic and Microelectronic Materials and Devices. COMMAD 2002. Proceedings (Cat. No.02EX601)

Polycrystalline CdS thin films, ranging in thickness from 30 to 200 nm, have been chemically depo... more Polycrystalline CdS thin films, ranging in thickness from 30 to 200 nm, have been chemically deposited onto glass substrates using an ammonia-cadmium-thiourea reaction solution. Using proton-induced X-ray emission and atomic force microscopy, these film's elemental composition, thickness and microstructure have been examined. Analysis indicates that there is a distinct change from the continuous phase deposition to a particulate phase deposition and that these two different phases produce layers of CdS with different densities. Because of this change in density the point where the particulate CdS phase becomes the dominant deposition process can be identified. A mechanism is proposed to explain this difference in film densities.

ABSTRACT In this paper, the effect of the width of inter-pixel boundary trench isolation (BTI) on... more ABSTRACT In this paper, the effect of the width of inter-pixel boundary trench isolation (BTI) on the response resolution of a two dimensional CMOS compatible photodiode array that has a stacked gradient homojunction (StaG) architecture, was simulated. Results were compared with the StaG photodiode with and without inter-pixel nested ridges. Backwall illumination showed increasing crosstalk as the BTI width increased due to more crosstalk carriers channeling into the widening trench. Frontwall illumination showed a reduction in crosstalk up to a BTI width of 5 mum, which was more reduced than for the backwall illumination. Both modes of illumination showed superior sensitivity compared to the StaG photodiode with and without ridges. However the StaG photodiode with ridges is still superior in reducing crosstalk than the StaG photodiode with BTI due to it being a more efficient minority carrier mirror.

This paper describes a fibre Bragg grating based reed switch for physical intrusion detection app... more This paper describes a fibre Bragg grating based reed switch for physical intrusion detection applications. The optical fibre reed switch can be used to detect a security breach in windows and doors.

The inscription of fibre Bragg gratings in endlessly single mode photonic crystal fibre using H2 ... more The inscription of fibre Bragg gratings in endlessly single mode photonic crystal fibre using H2 loading and direct-writing through a phase mask with a 193 nm ArF laser is reported.

A review of optical delay lines (SODL) for low coherence interferometry is presented. Special emp... more A review of optical delay lines (SODL) for low coherence interferometry is presented. Special emphasis is given to the present status of the stepped mirrored structure (SMS) - optical light valve SODL. Proof of principle test in a Mach Zhender configuration proved successful in determining the step heights of an SMS with 130μm steps. Fabrication of SMS with 10μm steps

Proceedings of SPIE, Dec 21, 2011

The current development of UV-Blue sensitive photo-detectors has lead to investigations with the ... more The current development of UV-Blue sensitive photo-detectors has lead to investigations with the polywell-stacked gradient poly-homojunction (StaG) configuration. Backwall illumination is of interest due to increased fill factor and pixel wavelength band tailoring. The StaG architecture has benefits. However, for benefit to backwall illumination the space charge region needs to be depleted to the backwall, possibly dispensing with the need for the StaG multi-layer. This research is an initial investigation of the benefit to crosstalk and sensitivity of the deep single well in high resolution, 5 μm pitch, photodiode arrays. The results indicate that geometries that are of fabricatable morphology can benefit backwall illumination especially in the U/V-blue wavelength spectrum.