Dr Peiman Hosseini, Oxford Materials

A new optoelectronic framework using chalcogenide based phase change materials
When Nov 16, 2015
from 02:00 PM to 03:00 PM
Where LR8
Contact Name
Contact Phone 01865-273925
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Traditional thin film optical filters rely on interference being generated at the boundaries between two materials with different refractive indexes. A multitude of well understood, easy to use, design techniques are widely available since the end of the 19th century. What often accomunates these techniques together is the use of highly transparent materials, usually insulators, with thicknesses multiples of 1/2 or 1/4 of the wavelength (i.e. hundreds of nanometres or more), to create filters with optical properties fixed at the initial design stage. 
In this seminar we will present an entirely new optoelectronic framework that not only employs thin films in the range of 1/50 to 1/100 of the visible wavelength but also uses mixed structures of metals and semiconductors to create ultra-fast, electrically tuneable optical films. Unprecedented applications such as ultra-high resolution flexible displays, smart windows for infrared management and security coatings will be presented and discussed.