Colloquium: Ian Galbraith

    Date: 
    Thursday, September 20, 2012 - 3:30pm - 5:00pm
    Location: 
    Meinel 307
    Description: 

    Ian Galbraith from Heriot-Watt University (United Kingdom) presents "Optical Physics in Organic Semiconductor Molecules."

    Abstract(s): 

    Organic semiconductor materials offer the potential of low-cost and flexible displays and lighting solutions, some of which have already made it to the marketplace. Despite this, much of the underlying optical physics remains poorly understood and hinders progress towards better and more powerful devices. In this talk, the basic properties of organic semiconductors will be reviewed and some of the outstanding issues explored. We will show how simple models based on dipole-dipole coupling can be validated (by comparison with quantum chemistry) and used to compute optical properties such as absorption, gain and luminescence spectra. Recent theoretical and experimental results on the optical pulse propagation and timescales of excitation transfer and hopping in linear oligoflourine and star-shaped samples will be also presented.

    Speaker Bio(s): 

    Galbraith obtained his Ph.D. from Heriot-Watt Univeristy (United Kingdom) in 1986 working on light propagation effects in optical bistability. After two years as a postdoctoral associate at the Institute for Theoretical Physics in Frankfurt, Germany, he joined Phillips Research Labs in Redhill (United Kingdom). He returned to Heriot-Watt as a Royal Society University research fellow. Upon completion of the fellowship he became a reader and later a professor in the physics department. Recently he has served as head of the department and as director of research for the School of Engineering and Physical Sciences, which encompasses chemistry, mechanical, electrical and chemical engineering as well as physics.