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Published on: March 20, 2015
Facet-embedded thin-film III-V edge-emitting lasers integrated with SU-8 waveguides on silicon
Sabarni Palit1, Jeremy Kirch, Mengyuan Huang
1Department of Electrical and Computer Engineering, Duke University, Box 90291, Durham, North Carolina 27708, USA. sabarni.palit@duke.edu
Abstract:
A thin-film InGaAs/GaAs edge-emitting single-quantum-well laser has been integrated with a tapered multimode SU-8 waveguide onto an Si substrate. The SU-8 waveguide is passively aligned to the laser using mask-based photolithography, mimicking electrical interconnection in Si complementary metal-oxide semiconductor, and overlaps one facet of the thin-film laser for coupling power from the laser to the waveguide. Injected threshold current densities of 260A/cm(2) are measured with the reduced reflectivity of the embedded laser facet while improving single mode coupling efficiency, which is theoretically simulated to be 77%.
