Title :
Observation of absorption modulation in a single quantum well exciton screening device
Author :
Tombling, C. ; Stallard, M.M. ; Roberts, J.S.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. Coll. London, UK
Abstract :
The use of free carriers to control the strength of the exciton resonance in quantum well material has been considered. The discrete energy levels of the quantum well create subbands which can be filled with free carriers, inhibiting the excitonic absorption. The modulation of light by this mechanism has previously been proposed (1987) and initial results reported (1987). The authors present the first direct experimental evidence showing modulation of exciton screening
Keywords :
III-V semiconductors; aluminium compounds; excitons; gallium arsenide; photoconductivity; photodiodes; semiconductor quantum wells; GaAs-AlGaAs; III-V semiconductors; absorption modulation; discrete energy levels; exciton resonance; free carriers; light modulation; photocurrent spectra; photodiode; single quantum well exciton screening device;
Conference_Titel :
Optical Communication, 1988. (ECOC 88). Fourteenth European Conference on (Conf. Publ. No.292)
Conference_Location :
Brighton
