Optical absorption studies in absorbing Bragg reflectors

Reflectivity and photoluminescence have been used to study optical absorption from an absorbing Bragg reflector consisting of AlAs/GaAs Bragg reflector and InGaAs/InGaAsP multiple-quantum-well absorbing layer. An absorption dip due to the optical confinement of the Fabry–Perot resonance was observed...

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Bibliographic Details
Published in:Optics communications 2001-11, Vol.199 (1), p.155-159
Main Authors: Shen, J.L, Chang, C.Y, Chen, P.N, Chou, W.C, Chen, Y.F, Wu, M.C
Format: Article
Language:English
Subjects:
Absorption
Bragg reflector
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optical elements, devices, and systems
Optics
Physics
Reflectors, beam splitters, and deflectors
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Summary:Reflectivity and photoluminescence have been used to study optical absorption from an absorbing Bragg reflector consisting of AlAs/GaAs Bragg reflector and InGaAs/InGaAsP multiple-quantum-well absorbing layer. An absorption dip due to the optical confinement of the Fabry–Perot resonance was observed in the reflectivity spectrum. Based on the transfer matrix method along with the complex index of refraction, we successfully analyzed the reflectivity spectrum and obtained the absorption coefficient of the absorbing cavity around 1550 nm. We also demonstrated that the quality factor of the Fabry–Perot mode in photoluminescence could be used to estimate the absorption coefficient of the cavity medium in our absorbing Bragg reflector.
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(01)01589-9