{
  "abstract": "Spectral sensing in the extended shortwave infrared (e-SWIR) is important for molecular analysis, infrared imaging, and machine vision, motivating the development of compact spectrometers for broader applications. However, conventional commercial off-the-shelf spectrometers in this wavelength region are expensive and bulky due to their reliance on external dispersive optics/filters and/or cryogenic accessories. Other emerging computational spectrometers are based on Si and InGaAs photodetectors that remain focused on the visible and near-infrared, with few detector platforms operating in the e-SWIR regime that simultaneously provide broadband sensitivity, low-noise room-temperature operation, and diverse spectral signatures for accurate identification and reconstruction. Here, we report a room-temperature e-SWIR computational spectrometer based on InAs/InP core-shell nanowire photodetector arrays with geometry-encoded spectral responses. The detectors exhibit self-powered broadband photoresponse across the 1--3 $μ$m range, with responsivity up to 0.215 A W$^{-1}$, detectivity up to $1.6 \\times 10^{9}$ cm Hz$^{1/2}$ W$^{-1}$, and microsecond response times. The excellent detector performance is leveraged to demonstrate filter-free spectral reconstruction using a compact multipixel photodetector array device. This enables high-accuracy molecular absorption spectrum reconstruction and hyperspectral imaging. Our results indicate that InAs nanowire arrays are a promising platform for compact computational spectrometry and imaging in the e-SWIR at room temperature.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.06952",
  "author_total": 19,
  "authors": [
    {
      "name": "Yang Yu"
    },
    {
      "name": "Wei Wen Wong"
    },
    {
      "name": "Zhe Li"
    },
    {
      "name": "Dawei Liu"
    },
    {
      "name": "Jinyuan Chen"
    },
    {
      "name": "Seyed Saleh Mousavi Khaleghi"
    },
    {
      "name": "Yue Bian"
    },
    {
      "name": "Kosala Dhanawansha"
    },
    {
      "name": "Li Li"
    },
    {
      "name": "Hongwei Liu"
    },
    {
      "name": "Xiaoxue Xu"
    },
    {
      "name": "Monica S. Allen"
    },
    {
      "name": "Jeffery W. Allen"
    },
    {
      "name": "Hark Hoe Tan"
    },
    {
      "name": "Chennupati Jagadish"
    },
    {
      "name": "Kenneth Crozier"
    },
    {
      "name": "Ziyuan Li"
    },
    {
      "name": "Chaohao Chen"
    },
    {
      "name": "Lan Fu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1c3e4041zdngd.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.06952",
  "fulltext_url": null,
  "id": "1c3e4041zdngd",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.06952",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "2204|Nanowire Synthesis and Applications"
    ]
  ],
  "openalex": "W7212025916",
  "pdf_url": "https://arxiv.org/pdf/2609.06952",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-10",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1c3e4041zdngd.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:26Z",
      "native_id": "2609.06952",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.06952"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Self-powered InAs nanowire detector arrays for extended-SWIR spectrometry at room temperature",
  "title_text": "Self-powered InAs nanowire detector arrays for extended-SWIR spectrometry at room temperature",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:26Z",
  "url": "https://research.draconitic.com/paper/1c3e4041zdngd",
  "venue": "arXiv",
  "versions": []
}