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Deep Sub-Wavelength 3D Imaging Using a Single Nanowire Detector

Lamers, Nils LU ; Anttu, Nicklas LU ; Adham, Kristi LU ; Hrachowina, Lukas LU ; Hessman, Dan LU ; Borgström, Magnus T. LU orcid and Wallentin, Jesper LU (2025) In Nano Letters 25(40). p.14534-14541
Abstract

Nanowires have an ideal shape for high-resolution imaging, with a small cross-section for high resolution and a long length for strong absorption. However, since the absorption in nanowires is dominated by nanophotonic effects, it is unclear what resolution and efficiency such devices could offer. Here, we investigate the limits of spatial resolution and efficiency of nanowire-based direct detectors using experiments and optical modeling. We demonstrate a direct detection scheme using a single pixel detector based on an InP 80 nm diameter nanowire diode by 3D imaging with a laser focus. Our detector has an apparent peak responsivity of 2.9 AW–1and a dynamic range of approximately 106in intensity. Optical modeling... (More)

Nanowires have an ideal shape for high-resolution imaging, with a small cross-section for high resolution and a long length for strong absorption. However, since the absorption in nanowires is dominated by nanophotonic effects, it is unclear what resolution and efficiency such devices could offer. Here, we investigate the limits of spatial resolution and efficiency of nanowire-based direct detectors using experiments and optical modeling. We demonstrate a direct detection scheme using a single pixel detector based on an InP 80 nm diameter nanowire diode by 3D imaging with a laser focus. Our detector has an apparent peak responsivity of 2.9 AW–1and a dynamic range of approximately 106in intensity. Optical modeling shows a clear optimum for the spatial resolution at around 100 nm nanowire diameter, while even smaller diameters lead to a loss of resolution. Additionally, we find that the nanowire diameter can be optimized for resolution and absorption simultaneously.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Detector, FDTD, Nanowire, Optical simulations
in
Nano Letters
volume
25
issue
40
pages
8 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:105018016801
  • pmid:40999802
ISSN
1530-6984
DOI
10.1021/acs.nanolett.5c03232
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 The Authors. Published by American Chemical Society
id
8533818c-acdf-4ff0-bd1c-509a3c781575
date added to LUP
2025-10-20 16:36:43
date last changed
2025-11-17 18:37:16
@article{8533818c-acdf-4ff0-bd1c-509a3c781575,
  abstract     = {{<p>Nanowires have an ideal shape for high-resolution imaging, with a small cross-section for high resolution and a long length for strong absorption. However, since the absorption in nanowires is dominated by nanophotonic effects, it is unclear what resolution and efficiency such devices could offer. Here, we investigate the limits of spatial resolution and efficiency of nanowire-based direct detectors using experiments and optical modeling. We demonstrate a direct detection scheme using a single pixel detector based on an InP 80 nm diameter nanowire diode by 3D imaging with a laser focus. Our detector has an apparent peak responsivity of 2.9 AW<sup>–1</sup>and a dynamic range of approximately 10<sup>6</sup>in intensity. Optical modeling shows a clear optimum for the spatial resolution at around 100 nm nanowire diameter, while even smaller diameters lead to a loss of resolution. Additionally, we find that the nanowire diameter can be optimized for resolution and absorption simultaneously.</p>}},
  author       = {{Lamers, Nils and Anttu, Nicklas and Adham, Kristi and Hrachowina, Lukas and Hessman, Dan and Borgström, Magnus T. and Wallentin, Jesper}},
  issn         = {{1530-6984}},
  keywords     = {{Detector; FDTD; Nanowire; Optical simulations}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{40}},
  pages        = {{14534--14541}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Nano Letters}},
  title        = {{Deep Sub-Wavelength 3D Imaging Using a Single Nanowire Detector}},
  url          = {{http://dx.doi.org/10.1021/acs.nanolett.5c03232}},
  doi          = {{10.1021/acs.nanolett.5c03232}},
  volume       = {{25}},
  year         = {{2025}},
}