Details of Grant 

EPSRC Reference:	GR/K16173/01
Title:	II-VI LASERS AND NONLINEAR OPTICS: ROLLING GRANT
Principal Investigator:	Cavenett, Professor B
Other Investigators:	Wilson, Professor Emeritus J Kar, Professor AK Taghizadeh, Professor MR Prior, Dr KA Wherrett, Professor B Pidgeon, Professor C Galbraith, Professor I
Researcher Co-Investigators:
Project Partners:
Department:	Physics
Organisation:	Heriot-Watt University
Scheme:	Standard Research (Pre-FEC)
Starts:	01 August 1994	Ends:	31 July 1997	Value (£):	966,344
EPSRC Research Topic Classifications:	Condensed Matter Physics Electronic Devices & Subsys. Lasers & Optics Materials Synthesis & Growth Optoelect. Devices & Circuits
EPSRC Industrial Sector Classifications:
Related Grants:
Panel History:
Summary on Grant Application Form
This research project addresses the development of wide bandgap laser and optoelectronic devices using MBE ZnSe and related alloy semiconductors in quantum well structures. There are four inter-related areas of activity: materials growth and characterisation; device fabrication and characterisation; nonlinear optics; and theoretical studies. The focus is provided by device targets; a stable, room-temperature blue laser diode; a low temperature pulsed UV laser diode; a high-contrast visible wavelength modulator.The science that will be carried out in order to reach these targets includes:(i) Growth of ZnSSe and ZnMgSSe structures, with characterisation of structural defects, leading to morphology control. Investigation of growth and n- and p-doping of ZnCdS for UV devices. Improvement of ohmic contacts for p-type ZnSe. (ii) Development of fabrication techniques for II-VI lasers and the fabrication of strained-layer based electro-optic devices. (iii) Measurement of excitation lifetimes and optical nonlinearities that control the device responses, using sub-picosecond laser techniques. (iv) Calculation of electronic energy level structure in II-VI quantum wells and of laser gain thresholds, incorporating many-body effects; and comparison with optical characterisation of the materials and device structures.
Key Findings
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Further Information:
Organisation Website:	http://www.hw.ac.uk