Pith Number

pith:64NHW5QP

pith:2026:64NHW5QPVHOZTRX2B3QD3YEB4F

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Stark-tunable O-band single-photon sources based on deterministically fabricated quantum dot--circular Bragg gratings on silicon

Alexander Kosarev, Imad Limame, Kartik Gaur, Kerstin Volz, Peter Ludewig, Priyabrata Mudi, Sarthak Tripathi, Stephan Reitzenstein

Quantum dots grown directly on silicon and embedded in electrically contacted circular Bragg gratings achieve a 16 nm Stark shift at telecom O-band wavelengths while preserving high single-photon purity up to 77 K.

arxiv:2604.23422 v2 · 2026-04-25 · physics.optics · cond-mat.mes-hall

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\pithnumber{64NHW5QPVHOZTRX2B3QD3YEB4F}

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Claims

C1strongest claim

The QD–eCBGs exhibit a quantum-confined Stark shift of approximately 16 nm (11 meV) at 4 K, representing a record for QDs embedded in nanophotonic structures at telecom wavelengths. This is achieved alongside a photon extraction efficiency of (21.7 ± 3.0)% into the first lens, while maintaining excellent radiative properties and high single-photon purity, with g^(2)(0)=0.0078 ± 0.0012 below saturation and g^(2)(0)=0.0183 ± 0.0021 at saturation under pulsed excitation. Robust antibunching persists up to 77 K.

C2weakest assumption

That the deterministic electron-beam lithography, ridge-based vertical p-i-n diode architecture, and direct InGaAs QD growth on silicon do not introduce defects, non-radiative paths, or fabrication-induced strain that would degrade the reported extraction efficiency, single-photon purity, or Stark shift beyond the stated values.

C3one line summary

Silicon-integrated InGaAs quantum dot single-photon sources in electrically contacted circular Bragg gratings demonstrate a record 16 nm quantum-confined Stark shift at O-band with high purity and operation up to 77 K.

Receipt and verification

First computed	2026-06-11T01:09:36.294971Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f71a7b760fa9dd99c6fa0ee03de081e1755318948dbb3bda74df36d7dbf7b76c

Aliases

arxiv: 2604.23422 · arxiv_version: 2604.23422v2 · doi: 10.48550/arxiv.2604.23422 · pith_short_12: 64NHW5QPVHOZ · pith_short_16: 64NHW5QPVHOZTRX2 · pith_short_8: 64NHW5QP

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/64NHW5QPVHOZTRX2B3QD3YEB4F \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: f71a7b760fa9dd99c6fa0ee03de081e1755318948dbb3bda74df36d7dbf7b76c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5b76c17d334aafce534856b8dc08c38d02e21b988967ea37c144f9542a4c3eb",
    "cross_cats_sorted": [
      "cond-mat.mes-hall"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2026-04-25T19:33:07Z",
    "title_canon_sha256": "baa3dddfd6b25e5bea4f9dd69cacce9d471a7b505f694eaaeaa35bf49725fc31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.23422",
    "kind": "arxiv",
    "version": 2
  }
}