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The control of waveguided modes in light-emitting materials is an important goal in quantum optics. It is of particular practical interest in planar optical devices such as light-emitting diodes (LED’s), in which most of the generated light is confined in waveguided modes, leading to a loss of usefully extractable radiation. In this paper we report the use of wavelength-scale microstructure to control light emission from thin films. In particular we show that lateral microstructure can be incorporated into an LED structure giving a doubling of the efficiency of the device.
© 2000 IEEE
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