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Integrating a Nanowire Laser in an on-Chip Photonic Waveguide

2022; American Chemical Society; Volume: 22; Issue: 24 Linguagem: Inglês

10.1021/acs.nanolett.2c03364

1530-6992

Ruixuan Yi, Xutao Zhang, Fanlu Zhang, Linpeng Gu, Qiao Zhang, Liang Fang, Jianlin Zhao, Lan Fu, Hark Hoe Tan, C. Jagadish, Xuetao Gan,

Mechanical and Optical Resonators

We report a simple and facile integration strategy of a laser source in passive photonic integrated circuits (PICs) by deterministically embedding semiconductor nanowires (NWs) in waveguides. InP NWs laid on a SiN slab are buried by a polymer layer which also acts as an electron-beam resist. With electron-beam lithography, hybrid polymer-SiN waveguides are formed with precisely embedded NWs. The lasing behavior of the waveguide-embedded NWs is confirmed, and more importantly, the NW lasing mode couples into the hybrid waveguide and forms an in-plane guiding mode. Multiple waveguide-embedded NW lasers are further integrated in complex photonic structures to illustrate that the waveguiding mode supplied by the NW lasers could be manipulated for on-chip signal processing, including power splitting and wavelength-division multiplexing. This integration strategy of an on-chip laser is applicable to other PIC platforms, such as silicon and lithium niobate, and the top cladding layer could be changed by depositing SiN or SiO2, promising its CMOS compatibility.