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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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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 However, it is anticipated that these materials will be superseded for many applications by diamond.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.