Open AccessOptical characteristics of DBR with inhomogeneous graded interfaces
Author(s) -
Xiaodong Wang,
Xuming Wu,
Kaixin Wang,
Yulian Cao,
He Guorong,
Manqing Tan
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.4983
Subject(s) - materials science , refractive index , optics , phase (matter) , layer (electronics) , wavelength , matrix (chemical analysis) , optoelectronics , matrix method , physics , composite material , quantum mechanics
Optical properties of Al0.9Ga0.1As/AlyGa1-yAs/GaAs/AlxGa1-xAs DBR with inhomogeneous graded interfaces has been investigated by using characteristic matrix method. The refractive index model and the analytic characteristic matrix of graded interfaces are obtained. The reflectance spectrum and the reflective phase shift are calculated for GaAs/Al0.9Ga0.1As DBR and graded interfaces DBR by using characteristic matrix method. The effect of graded interfaces on the optical properties of DBR is discussed. The result shows an extra graded phase matching layer must be added in front of the graded interfaces DBR to fulfil the conditions of phase matching at central wavelength. The accurate thickness of phase matching layer is calculated by optical thickness approximation method.