• 研究課題をさがす
  • 研究者をさがす
  • KAKENの使い方
  1. 課題ページに戻る

2021 年度 実施状況報告書

光ナノファイバデータバスを用いたリドベルグ原子の量子ネットワーク

研究課題

研究課題/領域番号 19K05316
研究機関沖縄科学技術大学院大学

研究代表者

NICCHORMAIC SILE  沖縄科学技術大学院大学, 量子技術のための光・物質相互作用ユニット, 教授 (10715288)

研究期間 (年度) 2019-04-01 – 2023-03-31
キーワードRydberg atoms / Casimir-Polder / Rubidium / Optical Nanofiber / Quantum / Network / Atomic Physics
研究実績の概要

Experimentally, we developed a method to continuously frequency shift a target laser that was frequency stabilized by a reference laser, which was several hundreds of nanometers detuned. We demonstrated the technique using the 5S 1/2 → 5P 3/2 → 29D 5/2 Rydberg transition in 87 Rb vapor and locked the 482 nm target laser to the 780 nm reference laser using the cascaded electromagnetically induced transparency signal. The stabilized frequency of the target laser can be shifted by about 1.6 GHz by phase modulating the reference laser using a waveguide-type electro-optical modulator. This simple method for stable frequency shifting can be used in atomic or molecular physics experiments that require a laser frequency scanning range on the order of several GHz.

Theoretically, we studied the trapping of a ground-state cesium atom in a small region around the midpoint between two coupled identical parallel optical nanofibers. We proposed using a blue-detuned guided light field to produce an optical potential with a local minimum of exactly zero at the midpoint between the nanofibers. We find that the effects of the van der Waals potential on the total trapping potential around the minimum point were not significant when the fiber separation distance and the power of the guided light field were large.

現在までの達成度 (区分)
現在までの達成度 (区分)

2: おおむね順調に進展している

理由

The work is progressing as planned. There were some delays due to COVID restrictions, but we are now making full progress on studying n-level behaviour next to an optical nanofibre.

今後の研究の推進方策

The future work is to finalise the studies in relation to n-level excitation of Rydberg atoms next to optical nanofibres. We have studied for S and D transitions and are currently developing a theory model with our collaborators to explain the observed phenomena. Once completed, we will proceed to developing a dipole trapping mechanism for Rydberg atoms.

次年度使用額が生じた理由

Due to some COVID related research and lab access delays.

  • 研究成果

    (2件)

すべて 2021

すべて 雑誌論文 (2件) (うち国際共著 2件、 査読あり 2件、 オープンアクセス 2件)

  • [雑誌論文] Optical trap for an atom around the midpoint between two coupled identical parallel optical nanofibers2021

    • 著者名/発表者名
      F Le Kien, S Nic Chormaic, T Busch
    • 雑誌名

      Physical Review A

      巻: 103 ページ: 063106

    • DOI

      10.1103/PhysRevA.103.063106

    • 査読あり / オープンアクセス / 国際共著
  • [雑誌論文] 1.6 GHz Frequency Scanning of a 482 nm Laser Stabilized Using Electromagnetically Induced Transparency2021

    • 著者名/発表者名
      KS Rajasree, K Karlsson, T Ray, S Nic Chormaic
    • 雑誌名

      IEEE Photonics Technology Letters

      巻: 33 ページ: 780-783

    • DOI

      10.1109/LPT.2021.3092316

    • 査読あり / オープンアクセス / 国際共著

URL: 

公開日: 2022-12-28   更新日: 2023-12-25  

サービス概要 検索マニュアル よくある質問 お知らせ 利用規程 科研費による研究の帰属

Powered by NII kakenhi