Toward Rapid Low-Cost Fabrication of Single-Nanowire Photodetectors via the Utilization of Dielectrophoresis

Laumier, Siriny, Bosi, Matteo, Seravalli, Luca and Sandall, Ian ORCID: 0000-0003-3532-0373 (2026) Toward Rapid Low-Cost Fabrication of Single-Nanowire Photodetectors via the Utilization of Dielectrophoresis ADVANCED PHOTONICS RESEARCH, 7 (1). ISSN 2699-9293, 2699-9293

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Abstract

The scalable fabrication of high‐performance nanowire (NW) photodetectors remains a critical challenge for the integration of nanoscale optoelectronics into practical technologies. This work presents a simple, rapid, and cost‐effective method for the deterministic assembly of single germanium (Ge) NWs between electrode pairs using a modified dielectrophoresis (DEP) setup. By introducing a voltage‐divider configuration with a series resistor, the method enables self‐limiting NW alignment, eliminating the need for nanoscale electrodes or extensive pre‐optimization. Devices fabricated via this approach exhibit high responsivity—exceeding 6 × 10 5  A W −1 at both 700 and 1550 nm—among the highest reported for single Ge NW photodetectors. This enhanced performance is attributed to asymmetric Schottky junctions and possible optical resonances within the NWs. The method enables the rapid production of single‐NW photodetectors with tunable properties, offering a versatile platform for low‐cost optoelectronic device manufacturing and advancing the feasibility of NW‐based sensing, imaging, and communication technologies.

Item Type:	Article
Uncontrolled Keywords:	dielectrophoresis, germanium, nanowires, photonics, sensing
Divisions:	Faculty of Science & Engineering Faculty of Science & Engineering > School of Engineering Faculty of Science & Engineering > School of Engineering > Electrical Engineering and Electronics
Depositing User:	Symplectic Admin
Date Deposited:	25 Nov 2025 16:45
Last Modified:	28 Feb 2026 01:15
DOI:	10.1002/adpr.202500213
Open Access URL:	https://doi.org/10.1002/adpr.202500213
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3195628
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