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Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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Properties of natural diamond microlenses fabricated by plasma etching

Choi, H.W. and Gu, E. and Liu, C. and Griffin, C. and Girkin, J.M. and Watson, I.M. and Dawson, M.D. (2005) Properties of natural diamond microlenses fabricated by plasma etching. Industrial Diamond Review, 2005 (2). pp. 29-32. ISSN 0019-8145

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Abstract

Refractive microlenses with diameters of between a few micrometers to a few hundred micrometers have received much attention, due to their numerous applications in, for example, optical communications, optical data storage, digital displays, and laser beam shaping. Wide band-gap inorganic materials, including GaN, SiC and ZnO have proved popular for these applications in recent years due to their attractive optical and electronic properties. However, it is anticipated that these materials will be superseded for many applications by diamond. Advantageous properties including optical transparency, high thermal conductivity and high carrier mobility make natural diamond an attractive choice, but its hardness and chemical inertness provide a significant challenge for device processing. This paper demonstrates the ability to etch natural grade-IIa diamond using inductively-coupled plasma etching and discusses the properties of the finished lenses in terms of surface roughness, surface profile and focal length.