FOR 1616: Dynamics and Interactions of Semiconductor Nanowires for Optoelectronics

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Semiconductor nanowires are the ideal tools for the investigation of the fundamental limits of one-dimensional optoelectronic and photonic devices. In many aspects, they are superior to their bulk or thin-film counterparts. Until now, in almost all cases the bare nanowire itself has been in the focus of research. Therefore, today we have very good control over growth and properties of semiconductor nanowires and proto-type optoelectronic devices are available. The next essential step is the integration of nanowires into specific functional environments to fully exploit their unique and superior physical properties. The Research Unit is dedicated to the dynamics and interactions of semiconductor nanowires for optoelectronics and studies the physical and technological aspects of the interaction mechanisms between semiconductor nanowires and their environment: We meet the challenge to determine the chances and the fundamental and practical limitations of functionalised nanowires for the realisation of efficient optoelectronic devices. The scientific work will lead to detailed insights into the coupling mechanisms of nanowires to their environment and help to identify and propel future developments in this field. Topics that are addressed within the Research Unit include the study of polaritons resulting from the strong light-matter interaction in nanowire cavities that can be used for efficient room-temperature multicolor LEDs or nanolasers. Collective effects from nanowire arrays can help to tailor the emission or absorption dynamics, thus, optimising the performance of future nanowire-based optoelectronic devices. Fundamental theoretical studies will elucidate the binding properties of functional organic compounds to the nanowire surface and determine the optimised geometry for efficient photonic devices. Finally, the Research Unit provides a broad scientific background for a clear judgement on the advantages and disadvantages of nanowire-based optoelectronics over conventional layer and bulk technologies.