Details of Grant 

EPSRC Reference:	GR/R77599/01
Title:	PHYSICS AND APPLICATIONS OF HIGH PERFORMANCE QUANTUM CASCADE LASERS
Principal Investigator:	Wilson, Professor L
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department:	Physics and Astronomy
Organisation:	University of Sheffield
Scheme:	Advanced Fellowship (Pre-FEC)
Starts:	01 November 2002	Ends:	31 October 2007	Value (£):	223,868
EPSRC Research Topic Classifications:	Lasers & Optics
EPSRC Industrial Sector Classifications:
Related Grants:
Panel History:	Panel Date Panel Name Outcome 20 Nov 2001 Technology Fellowships Sift Panel Deferred
Summary on Grant Application Form
QC lasers have revolutionised the generation of mid infrared radiation, producing high output powers, wavelength selectivity (X,-3-25Nm) and operation above room temperature. In this application I propose an extensive programme of research which builds on this potential, aiming to achieve major improvements in performance and greatly extend the operating wavelength range, so that QC lasers are ready for exploitation in a range of technological applications. I will significantly improve GaAs-based QC laser performance and investigate new active region designs for far infrared emission. The large conduction band offsets achievable in the antimonide and nitride materials systems will be utilised to produce QC devices operating at short (X,-1.5-Sum) wavelengths. Novel photonic crystal waveguide structures will be investigated which should provide lower losses and improved heat dissipation, resulting in lower threshold current devices capable of higher operating temperatures. QC lasers operating at ultra-high speeds will be investigated as sources for wireless optical links, providing lower atmospheric transmission losses than conventional near infra red sources. I will also develop QC lasers for medical physics applications, with particular emphasis on respiratory gas analysis, used in the diagnosis and treatment of severe lung disorders.
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Organisation Website:	http://www.shef.ac.uk