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Strathprints makes available scholarly Open Access content by the Fraser of Allander Institute (FAI), a leading independent economic research unit focused on the Scottish economy and based within the Department of Economics. The FAI focuses on research exploring economics and its role within sustainable growth policy, fiscal analysis, energy and climate change, labour market trends, inclusive growth and wellbeing.

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Nitride micro-display with integrated micro-lenses

Choi, H.W. and Gu, E. and Girkin, J.M. and Dawson, M.D. (2005) Nitride micro-display with integrated micro-lenses. Physica Status Solidi C, 2. pp. 2903-2906. ISSN 1610-1642

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Abstract

We report progress in control of the emission from both parallel-addressed and matrix-addressed micro-array light-emitting diodes (micro-LEDs), using integrated micro-lenses. The integrated matrix-addressed device consists of a 128 × 96 element array with 470 nm emission, aligned to a 128 × 96 element sapphire micro-lens array. The lenses have a diameter of 12 µm, a centre height of 1.8 µm and a measured focal length of 8 µm. The root-mean-square (r.m.s.) roughness of the lenses, as measured by atomic force microscopy (AFM), is better than 3 nm, ensuring high optical quality. The integrated array enables the light emitted from the individual elements to be well-resolved.