Title :
A comparative study of GaAs/AlGaAs quantum well infrared photodetectors grown by molecular beam epitaxy and metal organic vapour phase epitaxy
Author :
Johnston, M.B. ; Dao, L.V. ; Gal, M. ; Lumpkin, N.E. ; Clark, R.G. ; Lan, F. ; Tan, H.H. ; Jagadish, C. ; Li, Na ; Chen, Zhanghai ; Liu, Xingquan ; Li, Ning ; Lu, Wei ; Shen, S.C.
Author_Institution :
Sch. of Phys., New South Wales Univ., Sydney, NSW, Australia
Abstract :
Quantum well infrared photodetector (QWIP) structures were grown by metal organic vapour phase epitaxy (MOVPE) and molecular beam epitaxy (MBE). These n-type QWIP structures were fabricated into devices. Inter-subband and inter-band transition energies were measured using photoresponse and photoluminescence spectroscopy. The carrier dynamics of one of the structures was analysed using temperature dependent up-conversion spectroscopy. These results were modelled with the solution of a three level system. Measurement of an n-type QWIP allows us to determine the inter-subband relaxation time of a p-type QWIP. The intersubband relaxation time of a p-type QWIP with 3 nm wide wells was determined to be 15 ps
Keywords :
III-V semiconductors; MOCVD coatings; aluminium compounds; gallium arsenide; molecular beam epitaxial growth; photodetectors; photoluminescence; semiconductor growth; semiconductor quantum wells; vapour phase epitaxial growth; 1.5 ps; 3 nm; GaAs-AlGaAs; GaAs/AlGaAs quantum well infrared photodetectors; carrier dynamics; inter-band transition energies; inter-subband transition energies; metal organic vapour phase epitaxy; molecular beam epitaxy; photoluminescence; photoresponse; Energy measurement; Epitaxial growth; Epitaxial layers; Gallium arsenide; Molecular beam epitaxial growth; Photodetectors; Photoluminescence; Semiconductor process modeling; Spectroscopy; Temperature dependence;
Conference_Titel :
Optoelectronic and Microelectronic Materials Devices, 1998. Proceedings. 1998 Conference on
Conference_Location :
Perth, WA
Print_ISBN :
0-7803-4513-4
DOI :
10.1109/COMMAD.1998.791659
