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CANCELLED! Organic Semiconductor Laser Sensors

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The efficient light emission and simple processing of organic semiconductors make them attractive candidates for miniature visible lasers. In this talk I will discuss recent progress in developing very compact optically pumped lasers, notably including the use of GaN light-emitting diodes as an indirect electrical drive for organic lasers. I will also describe how organic semiconductors can function as very sensitive detectors of nitroaromatic explosives vapours using a reversible quenching of the light emission. When configured as thin-film distributed feedback lasers, the presence of explosive vapours can be used to switch operation across laser threshold, giving a rapid response to ppb concentrations of TNT -like molecules.

This talk is part of the Optoelectronics Group series.

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