Journal article
Optimization of heterogeneously integrated InP-Si on-chip photonic components
Wrocław University of Science and Technology1
NanoPhoton – Center for Nanophotonics, Centers, Technical University of Denmark2
Nanophotonic Devices, Department of Electrical and Photonics Engineering, Technical University of Denmark3
Department of Electrical and Photonics Engineering, Technical University of Denmark4
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark5
We demonstrate comprehensive numerical studies on a hybrid III-V/Si-based waveguide system, serving as a platform for efficient light coupling between an integrated III-V quantum dot emitter to an on-chip quantum photonic integrated circuit defined on a silicon substrate. We propose a platform consisting of a hybrid InP/Si waveguide and an InP-embedded InAs quantum dot, emitting at the telecom C-band near 1550 nm.
The platform can be fabricated using existing semiconductor processing technologies. Our numerical studies reveal nearly 87% of the optical field transfer efficiency between geometrically-optimized InP/Si and Si waveguides, considering propagating field along a tapered geometry. The coupling efficiency of a directional dipole emission to the hybrid InP/Si waveguide is evaluated to ∼38%, which results in more than 33% of the total on-chip optical field transfer efficiency from the dipole to the Si waveguide.
We also consider the off-chip outcoupling efficiency of the propagating photon field along the Si waveguide by examining the normal to the chip plane and in-plane outcoupling configurations. In the former case, the outcoupling amounts to ∼26% when using the circular Bragg grating outcoupler design. In the latter case, the efficiency reaches up to 8%.
Finally, we conclude that the conceptual device’s performance is weakly susceptible to the transferred photon wavelength, offering a broadband operation within the 1.5-1.6 µm spectral range.
Language: | English |
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Year: | 2023 |
Pages: | 1541-1556 |
ISSN: | 10944087 |
Types: | Journal article |
DOI: | 10.1364/OE.474259 |
ORCIDs: | Sakanas, Aurimas and Semenova, Elizaveta |