{
  "abstract": "Optoelectronic Chromatic Dispersion (OED) is a source of significant wavelength-dependent current in photodiodes, offering a pathway to computational spectroscopy in a photodiode-only platform without the need for additional optical or mechanical components. Previous studies have activated OED through light modulation. Here, we present a theoretical and experimental investigation of bias-modulated OED in the C- and L-bands in a Ge PN photodiode, where the applied bias voltage is modulated sinusoidally, and the optical illumination is held constant. The spectral response is due to wavelength-dependent optical absorption together with bias-dependent competition between carrier drift, displacement current, and mobile-charge screening. With the RF phase-shift technique, the maximum measured OED sensitivity is +4.13 deg/nm in the L-band, significantly larger than that of light-modulated OED in Ge. The 15 mdeg phase-noise floor yields a spectral resolution of 3.6 pm. These results establish bm-OED as an electronically reconfigurable dispersive mechanism for applications in chip-scale computational spectrometers, photonic integrated circuits (PICs), on-chip RF photonics, and wavelength-division multiplexing.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.20039",
  "author_total": 6,
  "authors": [
    {
      "name": "Uttama Kumar Saint"
    },
    {
      "name": "Ziv Glasser"
    },
    {
      "name": "Egor Liokumovitch"
    },
    {
      "name": "Endalamaw Ewnu Kassa"
    },
    {
      "name": "Asaf Albo"
    },
    {
      "name": "Shmuel Sternklar"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f00sjgmab5pky.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.20039",
  "fulltext_url": null,
  "id": "f00sjgmab5pky",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.20039",
  "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",
      "2208|Advanced Photonic Communication Systems"
    ]
  ],
  "openalex": "W7222019545",
  "pdf_url": "https://arxiv.org/pdf/2610.20039",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f00sjgmab5pky.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:18Z",
      "native_id": "2610.20039",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.20039"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Bias-Modulated Electronically-Tunable Optoelectronic Chromatic Dispersion in Ge PN Photodiodes",
  "title_text": "Bias-Modulated Electronically-Tunable Optoelectronic Chromatic Dispersion in Ge PN Photodiodes",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:18Z",
  "url": "https://research.draconitic.com/paper/f00sjgmab5pky",
  "venue": "arXiv",
  "versions": []
}