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Microstripe-array InGaN light-emitting diodes with individually addressable elements

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7 Author(s)
Zhang, H.X. ; Inst. of Photonics, Strathclyde Univ., Glasgow ; Gu, E. ; Jeon, C.W. ; Gong, Z.
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High-performance InGaN light-emitting diodes consisting of 120 side-by-side and individually addressable microstripe elements have been successfully fabricated. Each stripe in these devices is 24 mum in width and 3600 mum long, with a center-to-center spacing between adjacent stripes of 34 mum. The emission wavelengths demonstrated range from ultraviolet (UV) (370 nm) to blue (470 nm) and green (520 nm). The devices show good uniformity and performance due to finger-pattern n-electrodes running between adjacent stripes. In the case of the UV devices for example, turn-on voltages are around 3.5 V and continuous-wave output powers per stripe ~80 muW at 20 mA. A major feature of these devices is their ability to generate pattern-programmable emission, which offers applications in areas including structured illumination wide-field sectioning optical microscopy

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Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 15 )