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IEEE Journal of Selected Topics in Quantum Electronics,
vol. 4, pp. 765-771, 1998
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Theoretical Studies Of AlGaAs-GaAs
Multiple-Quantum-Well Optical Couplers Defined
by Ion-Implantation-Induced Intermixing
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Kai Ming Lo
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Abstract:
A simple and accurate model is presented for the
analysis of ion implanted AlGaAs-GaAs multiple-quantum-well
(MQW) symmetric and asymmetric optical couplers. The modal
propagation constants and field profiles of the guided modes of the
couplers are solved numerically using a quasivector method based
on the Galerkin's method. MQW optical couplers defined by
ion-implantation-induced intermixing are shown to have similar
optical properties as conventional dielectric rib optical couplers.
They also provide a more flexible control over the waveguiding
and coupling characteristics by changing parameters such as
waveguide separation, mask width, ion implant energy, and
diffusion time.