ORCID Profile
0000-0002-2564-8626
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Publisher: Elsevier BV
Date: 07-1989
Publisher: Elsevier BV
Date: 11-1990
Publisher: Springer Science and Business Media LLC
Date: 27-02-2021
Publisher: Elsevier BV
Date: 2012
Publisher: Elsevier BV
Date: 04-1989
Publisher: Springer Science and Business Media LLC
Date: 1992
Abstract: Indium Phosphide (InP) based multilayer structures are becoming increasingly important in the semiconductor industry with optoelectronic applications being the main growth area. Mesa type structures with finely controlled width and etch angle, often form the building blocks for many of these photonic devices. Traditional wet etching techniques have often proved to be inadequate for the required anisotropie removal of material. This paper presents the results of etching semi-insulating InP (100) using a combination of an Argon ion beam and a reactive gas, CCl 2 F 2 (Freon 12). It was found that the etch rate was enhanced by increasing the ion energy and by the addition of CCl 2 F 2 . Auger electron spectroscopy revealed that the increased etch rate was accompanied by an increase in the surface indium concentration and at low ion beam energies carbon build-up retarded the etch rate. The optimum etch angle to fabricate 3μm waveguides was found to be 22° to the surface normal, however Schottky contacts to these structures were unsuccessful.
Publisher: The Royal Society
Date: 22-07-2020
Abstract: The Nobel Prize has acted as a surrogate record of invention and discovery throughout the twentieth century. Based on this surrogacy, many claims are made regarding both trends in research and claims for places of research excellence. In this paper I propose that any analysis should be weighted by the ‘prize share’ made by the Royal Swedish Academy of Sciences to each recipient. In addition, I argue for a focus on the organization and period when the prize-winning research was carried out, rather than when the award was made and the often quoted ‘affiliated organization at the time of award’. I use this to briefly examine types of invention and discovery for all Nobel Prizes in Physics awarded to date (1901–2019). I then use this ‘place’ lens to briefly explore trends in invention and discovery in the awarding of the Nobel Prize in Physics. I conclude by drawing attention to the difference between institutions claiming Nobel Laureates and institutions where Nobel Prize-winning discoveries and inventions have been made.
Publisher: The Company of Biologists
Date: 2004
DOI: 10.1242/JEB.00713
Abstract: Coral reef fishes are not known for their hypoxia tolerance. The coral-dwelling goby, Gobiodon histrio, rarely leaves the shelter of its host coral colony. However, our measurements indicate that this habitat could become hypoxic on calm nights ([O2] minima=2–30% of air saturation) due to respiration by the coral and associated organisms. Moreover, at very low tides, the whole coral colony can be completely air exposed. Using closed respirometry in water, we found that G. histriomaintains O2 uptake down to 18% of air saturation, and that it can tolerate at least 2 h at even lower O2 levels. Furthermore, during air exposure, which was tolerated for more than 3 h, it upheld a rate of O2 consumption that was 60% of that in water. The hypoxia tolerance and air breathing abilities enables this fish to stay in the safety of its coral home even when exposed to severe hypoxia or air. To our knowledge, this is the first report of hypoxia tolerance in a teleost fish intimately associated with coral reefs.
Publisher: Elsevier BV
Date: 06-1991
Publisher: Elsevier BV
Date: 1990
Publisher: Elsevier BV
Date: 02-2018
Publisher: Elsevier BV
Date: 1991
Publisher: Elsevier BV
Date: 09-1993
Publisher: Springer Science and Business Media LLC
Date: 1983
DOI: 10.1557/PROC-23-663
Abstract: High dose antimony and tellurium implanted (100) GaAs wafers have been annealed in the solid phase under various time/temperature conditions using a conventional furnace, a rapid incoherent light source and a continuous wave CW Argon ion laser. The s les were capped with RF sputtered SiO 2 prior to annealing and analysed using 2MeV He ++ ion channeling to determine the solid solubility of the implanted ions. Results indicate that the Te is more soluble than Sb highest solubilities measured were 6 × 10 20 cm −3 for Te and 1.3 × 10 20 cm −3 for Sb.
Publisher: Springer Science and Business Media LLC
Date: 1983
DOI: 10.1557/PROC-27-205
Abstract: This paper presents new data on the previously observed porous structures which can be developed in high dose, ion implanted Ge. In addition, we provide strong evidence to suggest that such porous structures can be formed in high dose, ion implanted Si and GaAs substrates under particular implant conditions. Comparison of the various systems using RBS analysis indicates that heavy ion doses as low as 10 14 cm −2 can give rise to such structural modifications in GaAs, whereas doses of 10 15 cm −2 are needed to observe an effect with Ge and doses usually exceeding 10 16 cm −2 are required for Si.
Publisher: Informa UK Limited
Date: 06-1990
Publisher: Elsevier BV
Date: 1991
Publisher: Elsevier BV
Date: 06-1991
Publisher: Elsevier BV
Date: 03-1985
Publisher: Elsevier BV
Date: 1992
Publisher: Elsevier BV
Date: 07-1991
Publisher: AIP Publishing
Date: 15-01-1994
DOI: 10.1063/1.356431
Abstract: The effect of He ion irradiation on the hydrogen content and structure of a-C:H films has been examined. Comparison of elastic recoil detection and Fourier transform infrared spectroscopy results have shown that significant hydrogen depletion occurs in conjunction with an equally significant change in the structure of the films. Examination of the films’ hydrogen profiles also indicates that the diffusion length of molecular hydrogen in these materials during bombardment may be between 160–320 nm.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Kevin Orrman-Rossiter.