Details of Grant 

EPSRC Reference:	GR/R35681/01
Title:	Patterned Opal-Based Structures for Optoelectronic Applications
Principal Investigator:	Johnson, Dr NP
Other Investigators:	De La Rue, Honorary Professor R McComb, Professor DW
Researcher Co-Investigators:
Project Partners:	Defence Science and Technology Laborator
Department:	Electronics and Electrical Engineering
Organisation:	University of Glasgow
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 2001	Ends:	31 March 2005	Value (£):	315,595
EPSRC Research Topic Classifications:	Materials Characterisation Materials Synthesis & Growth
EPSRC Industrial Sector Classifications:	Construction Electronics
Related Grants:
Panel History:
Summary on Grant Application Form
We propose to fabricate patterned opal-based structures for optoelectronics applications. Using electron-beam written templates with arrays of shallow holes, photonic crystals will be synthesised by template-directed epitaxial growth of silica and latex spheres. The templates will allow us to control the growth orientation and shape of the crystal and introduce intentional photonic crystal defects, thus forming the basis for optoelectronic device elements. We propose also to demonstrate optical localisation and waveguide-type confinement, which are important for optoelectronic functionality, by the formation of line defects, eg from changes in the template symmetry or by variation of ball size, refractive index and infill material.The physical incorporation of fluorescent dyes in solvent into opal photonic crystal structures will provide an important proof of principle to demonstrate lasing action in the structures. The incorporation of solid dyes into the spheres before crystallisation will aid observation of the growth process, while post-growth incorporation of dye will provide a more stable solid gain medium.We also propose to develop the infilling of various shaped opal and inverted opal based photonic crystal structures with GaN, using knowledge gained in our dye-based study and a reduced temperature MOCVD process.
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Organisation Website:	http://www.gla.ac.uk