Coherent control of a solid state qubit on an optical nanofiber

• Project/Area Number: 15K13544
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: Tohoku University
• Principal Investigator: Sadgrove Mark 東北大学, 電気通信研究所, 准教授 (40625000)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: ナノフォトニクス / ナノ粒子 / 量子情報 / Quantum information / Nanophotonics / Quantum emitters / Nanoparticles

Outline of Final Research Achievements

In this research, we made significant progress towards the goal "Coherent control of a solid state qubit on an optical nanofiber". The progress and successes will be described below.
i) Establishment of new nanofiber fabrication equipment at Tohoku University: A new experiment was built to manufacture high transmission nanofibers. Nanofibers with diameters as low as 300 nm and transmissions as high as 98% were realized. ii) Near-deterministic deposition of single nanoparticles on a nanofiber: Solid-state emitters in the form of nano-crystals can be interfaced by with optical nanofibers by placing them on the surface of the nanofiber. We devloped a method for depositing nanoparticles on the surface of a nanofiber with a good success rate (~50%) of achieving a single nanoparticle. iii) We fabricated grating nanostructures to create nanofiber cavities and to measure nanofiber diameters. iv) We developed new methods for trapping particles at optimal positions for nanofiber coupling.

Research Products

• [Journal Article] Composite device for interfacing an array of atoms with a single nanophotonic cavity mode (2017)
  • Author(s): M Sadgrove, KP Nayak
  • Journal Title: New Journal of Physics Volume: TBA Issue: 6 Pages: 063003-063003
  • DOI: 10.1088/1367-2630/aa6d3d
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Dynamically unpolarized singlephoton source in diamond with intrinsic randomness (2017)
  • Author(s): Naofumi Abe, Yasuyoshi Mitsumori, Mark Sadgrove, Keiichi Edamatsu
  • Journal Title: Scientific Reports Volume: 7 Issue: 1 Pages: 46722-46722
  • DOI: 10.1038/srep46722
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Quantum coherent tractor beam effect for atoms trapped near a nanowaveguide (2016)
  • Author(s): M. Sadgrove, S. Wimberger and S. Nic Chormaic
  • Journal Title: Scientific Reports Volume: 6 Issue: 1 Pages: 289051-13
  • DOI: 10.1038/srep28905
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] “Diameter measurement of optical nanofibers using a composite photonic crystal cavity” (2015)
  • Author(s): J. Keloth, M. Sadgrove, R. Yalla, K. Hakuta
  • Journal Title: Optics Letters Volume: 40 Issue: 17 Pages: 4122-4125
  • DOI: 10.1364/ol.40.004122
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 任意の偏光状態に対するナノ導波路のキラル性の測定 (2017)
  • Author(s): 菅原大和, Mark Sadgrove, 三森康義, 枝松圭一
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学
• [Presentation] Towards generalized two-qubit measurement using an hyperentangled photon source (2017)
  • Author(s): VIDIL Pierre, 三森康義, SADGROVE Mark, 枝松圭一
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学
• [Presentation] 半導体量子ドットにおける光双安定性の出現 (2017)
  • Author(s): 三森康義, 常盤圭祐, Mark Sadgrove, 枝松圭一
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学
• [Presentation] 光伝搬モードによる粒子の光学引力実現へ向けて (2017)
  • Author(s): Mark Sadgrove
  • Organizer: 第64回応用物理学会
  • Place of Presentation: Pacifico横浜
  • Invited
• [Presentation] Optical nanofiber diameter measurements using a composite photonic crystal cavity (2016)
  • Author(s): J. Keloth, M. Sadgrove, R. Yalla, K. Hakuta
  • Organizer: 日本物理学会第７１回年次大会
  • Place of Presentation: 宮城県、仙台市、東北学院大学
  • Year and Date: 2016-03-19
• [Presentation] ナノ光ファイバー表面上に導入された金ナノ粒子の分布 (2016)
  • Author(s): M. Sugawara, M. Sadgrove, Y. Mitsumori, K. Edamatsu
  • Organizer: 日本物理学会第７１回年次大会
  • Place of Presentation: 宮城県、仙台市、東北学院大学
  • Year and Date: 2016-03-19
• [Presentation] Composite methods in nanofiber based quantum optics (2015)
  • Author(s): M. Sadgrove, J. Keloth, R. Yalla, K. P. Nayak, K. Hakuta
  • Organizer: Asian Pacific Conference and Workshop on Quantum Information Science
  • Place of Presentation: The University of Auckland (New Zealand)
  • Year and Date: 2015-11-30
  • Int'l Joint Research
• [Presentation] Cavity QED on a nanofiber (2015)
  • Author(s): M. Sadgrove, R. Yalla, K. P. Nayak, K. Hakuta
  • Organizer: MIT - Tohoku University Research Exchange Symposium,
  • Place of Presentation: Massachusetts Institute of Technology (U.S.A.)
  • Year and Date: 2015-07-01
  • Int'l Joint Research