title: Computation of the modal reflectivity for a partially etched mirror: application for integration of a laser diode and a waveguide.
abstract: We demonstrate a fast, accurate for weak waveguiding, approximate solution to the problem of computing the modal reflection and transmission coefficients at a discontinuity between two asymmetric multilayer waveguides together with a rigorous solution to check the validity of the approximate but fast approach. The proposed algorithm is analogous to the widely used approximation proposed by Vassallo [Electron. Lett. 21, 333 (1985)] for the case when the medium after discontinuity is uniform and has a large applicability potential for optoelectronic applications. As an example, the case of optoelectronic integration between an active laser diode and a passive waveguide device is analyzed.
authors.affiliation: Department of Electronic Materials Engineering, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia. bmn109@rsphysse.anu.edu.au
authors.forename: Manuela
authors.initials: M
authors.lastname: Buda
authors.forename: Chennupati
authors.initials: C
authors.lastname: Jagadish