Details of Grant 

EPSRC Reference:	GR/M47102/01
Title:	LONG WAVELENGTH QUANTUM DOT LASERS
Principal Investigator:	Adams, Professor A
Other Investigators:	Sale, Dr TE Murdin, Professor BN Hosea, Dr TJC Silver, Dr M O'Reilly, Professor E
Researcher Co-Investigators:
Project Partners:	Hewlett Packard Inc
Department:	Sch of Electronics & Physical Sciences
Organisation:	University of Surrey
Scheme:	Standard Research (Pre-FEC)
Starts:	01 May 1999	Ends:	31 January 2003	Value (£):	171,203
EPSRC Research Topic Classifications:	Optoelect. Devices & Circuits
EPSRC Industrial Sector Classifications:	Electronics
Related Grants:
Panel History:
Summary on Grant Application Form
Trunk communications using silica optical fibres at 1.55um have grown enormously in recent years. However, all 1.55um lasers are very temperature sensitive and require expensive control modules. Therefore, if such systems are to be extended into the home and into the workplace, cheaper, simpler to operate devices are required. InAs on InP quantum dots promise lasers ideal for this purpose.This proposal aims to develop these devices starting from basic growth through to working laser diodes.The samples will be provided by the IRC. At Surrey we will use modulated reflectance to study interband transitions and the pump-probe, mid-IR and near IR spectroscopy available to us at FELIX to investigate intraband transitions and carrier dynamics. Edge-emitting lasers will be fabricated and studied in detail using a variety of experimental and theoretical techniques developed recently at Surrey for 1.55 (m quantum well lasers. This will involve novel high pressure and low temperature techniques.Theoretical models will address 1) the electronic band structure including strain effects 2) radiative and non-radiative transitions and optical gain, 3) the waveguide structure and lasing characteristics. Finally, experimentally tested guidelines for optimum laser structures will be produced for transfer to industrial collaborators and the DERA.
Key Findings
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Potential use in non-academic contexts
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Organisation Website:	http://www.surrey.ac.uk