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Fundamental aspects to localize self-catalyzed III-V nanowires on silicon.


ABSTRACT: III-V semiconductor nanowires deterministically placed on top of silicon electronic platform would open many avenues in silicon-based photonics, quantum technologies and energy harvesting. For this to become a reality, gold-free site-selected growth is necessary. Here, we propose a mechanism which gives a clear route for maximizing the nanowire yield in the self-catalyzed growth fashion. It is widely accepted that growth of nanowires occurs on a layer-by-layer basis, starting at the triple-phase line. Contrary to common understanding, we find that vertical growth of nanowires starts at the oxide-substrate line interface, forming a ring-like structure several layers thick. This is granted by optimizing the diameter/height aspect ratio and cylindrical symmetry of holes, which impacts the diffusion flux of the group V element through the well-positioned group III droplet. This work provides clear grounds for realistic integration of III-Vs on silicon and for the organized growth of nanowires in other material systems.

SUBMITTER: Vukajlovic-Plestina J 

PROVIDER: S-EPMC6382777 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature

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Fundamental aspects to localize self-catalyzed III-V nanowires on silicon.

Vukajlovic-Plestina J J   Kim W W   Ghisalberti L L   Varnavides G G   Tütüncuoglu G G   Potts H H   Friedl M M   Güniat L L   Carter W C WC   Dubrovskii V G VG   Fontcuberta I Morral A A  

Nature communications 20190220 1


III-V semiconductor nanowires deterministically placed on top of silicon electronic platform would open many avenues in silicon-based photonics, quantum technologies and energy harvesting. For this to become a reality, gold-free site-selected growth is necessary. Here, we propose a mechanism which gives a clear route for maximizing the nanowire yield in the self-catalyzed growth fashion. It is widely accepted that growth of nanowires occurs on a layer-by-layer basis, starting at the triple-phase  ...[more]

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