Title :
Long period grating for 3-5 μm quantum-well infra-red photodetectors
Author :
Pan, David Z. ; Kong, Michael
Author_Institution :
Inst. of Semicond., Acad. Sinica
fDate :
5/23/1996 12:00:00 AM
Abstract :
By considering all possible high order diffracted waves, the authors calculate the coupling efficiency of long period gratings for 3-5 μm quantum-well infra-red photodetectors (QWIPs) on the basis of the modal expansion model (MEM). A large coupling efficiency for 3-5 μm QWIPs has been demonstrated. This greatly reduces the difficulties in fabricating 3-5 μm grating coupled QWIPs and opens the way to fabricate high performance 3-5 μm and two colour QWIPs image arrays
Keywords :
diffraction gratings; infrared detectors; photodetectors; semiconductor quantum wells; μm quantum-well infra-red photodetectors; 3 to 5 mum; IR detectors; coupling efficiency; grating coupled QWIPs; high order diffracted waves; high performance 3-5 μm image arrays; large coupling efficiency; long period grating; long period gratings; modal expansion model;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19960634
