Toward the realization of highly efficient photonic quantum memory using diamond vacancy centers as lambda-type atoms.

2014 Fiscal Year Final Research Report

• Project/Area Number: 23244079
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: Kyoto University (2013); Hokkaido University (2011-2012)
• Principal Investigator: TAKEUCHI shigeki 京都大学, 工学(系)研究科(研究院), 教授 (80321959)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 光子 / 量子メモリ / 量子情報 / 量子中継

Outline of Final Research Achievements

Toward the realization of photonic quantum memory, we studied on the system where a nitrogen vacancy center (NVC) in diamond is coupled to micro optical cavity with tapered optical fiber input/output. First, we successfully observed the first observation of an ultra-narrow linewidth (1.2 GHz) of the photoemission from a single NV center in a nanodiamond. We also realized a fiber-microsphere system at cryogenic temperature below 10K. We also successfully performed the optically detected magnet resonance of a single/few NV centers coupled with a tapered optical fiber. Finally, we succeeded in the realization of a nanofiber brag cavity and the highly efficient coupling of a single emitter to the system. These results are important steps for the realization of the photonic quantum memory.

Free Research Field

量子光学、量子情報