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Details of Grant 

EPSRC Reference: GR/K79871/01
Title: LEVEL POPULATIONS, POPULATION INVERSION AND BALLISTIC TRANSPORT IN SEMICONDUCTORTUNNELLING STRUCTURES
Principal Investigator: Skolnick, Professor M
Other Investigators:
Mowbray, Professor D Cockburn, Professor J Hill, Dr G
Whittaker, Professor DM Whittaker, Dr D
Researcher Co-Investigators:
Project Partners:
Department: Physics and Astronomy
Organisation: University of Sheffield
Scheme: Standard Research (Pre-FEC)
Starts: 01 November 1995 Ends: 30 April 1999 Value (£): 266,056
EPSRC Research Topic Classifications:
Condensed Matter Physics
EPSRC Industrial Sector Classifications:
Electronics
Related Grants:
Panel History:  
Summary on Grant Application Form
The aim of the proposals is to obtain favourable population ratios, and where feasible population inversions, in a variety of deliberately engineered double and triple barrier resonant tunnelling structures. Such structures have strong relevance for application as unipolar infra-red emitters. A variety of spectroscopic techniques will be employed to provide precise information on the level populations achieved under device operating conditions. The principal topics are 1a) Observation of a population inversion at inter-sub-band energies below the LO phonon energy in wide well double barrier resonant tunnelling structures (DBRTS). 1b) Attainment of a population inversion in narrow well DBRTS. 1c) The use of triple barrier structures to control selectively the tunnelling rates and hence population ratios. 2) The study of inter-sub-band emission form the structures of 1a,b,c, structures using EL spectroscopy.
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Organisation Website: http://www.shef.ac.uk