Abstract

We have performed a numerical study involving the design and optimization of InP-based microdisk lasers integrated on and coupled to a nanophotonic silicon-on-insulator (SOI) waveguide circuit, fabricated through bonding technology. The theoretical model was tested by fitting it to the lasing characteristics obtained for fabricated devices, which we presented previously. A good fit was obtained using parameter values that are consistent with numerical simulation. To obtain optimized laser performance, the composition of the InP-based epitaxial layer structure was optimized to minimize internal optical loss for a structure compatible with efficient current injection. Specific attention was paid to a tunnel-junction based approach. Bending loss was quantified to estimate the minimum microdisk diameter. The coupling between the InP microdisk and Si waveguide was calculated as function of the bonding layer thickness, waveguide offset and waveguide width. To study the lateral injection efficiency, an equivalent electrical network was solved and the voltage-current characteristic was calculated. Based on these results, the dominant device parameters were identified, including microdisk thickness and radius, coupling loss and tunnel-junction p-type doping. These parameters were optimized to obtain maximum wall-plug efficiency, for output powers in the range 1–100 µW. The results of this optimization illustrate the potential for substantial improvement in laser performance.

© 2007 IEEE

Electrically pumped InP-based microdisk lasers integrated with a nanophotonic silicon-on-insulator waveguide circuit

J. Van Campenhout, P. Rojo-Romeo, P. Regreny, C. Seassal, D. Van Thourhout, S. Verstuyft, L. Di Cioccio, J.-M. Fedeli, C. Lagahe, and R. Baets
Opt. Express 15(11) 6744-6749 (2007)

Heterogeneous integration of electrically driven microdisk based laser sources for optical interconnects and photonic ICs

P. Rojo Romeo, J. Van Campenhout, P. Regreny, A. Kazmierczak, C. Seassal, X. Letartre, G. Hollinger, D. Van Thourhout, R. Baets, J.M. Fedeli, and L. Di Cioccio
Opt. Express 14(9) 3864-3871 (2006)

Uniformity of the lasing wavelength of heterogeneously integrated InP microdisk lasers on SOI

P. Mechet, F. Raineri, A. Bazin, Y. Halioua, T. Spuesens, T. J. Karle, P. Regreny, P. Monnier, D. Van Thourhout, I. Sagnes, R. Raj, G. Roelkens, and G. Morthier
Opt. Express 21(9) 10622-10631 (2013)

A low–power high–speed InP microdisk modulator heterogeneously integrated on a SOI waveguide

Jens Hofrichter, Oded Raz, Antonio La Porta, Thomas Morf, Pauline Mechet, Geert Morthier, Tjibbe De Vries, Harm J. S. Dorren, and Bert J. Offrein
Opt. Express 20(9) 9363-9370 (2012)

Laser emission and photodetection in an InP/InGaAsP layer integrated on and coupled to a Silicon-on-Insulator waveguide circuit

G. Roelkens, D. Van Thourhout, R. Baets, R. Nötzel, and M. Smit
Opt. Express 14(18) 8154-8159 (2006)