Photodynamics and quantum efficiency of germanium vacancy color centers in diamond
Photodynamics and quantum efficiency of germanium vacancy color centers in diamond作者机构：University of Technology Sydney School of Mathematical and Physical Sciences 2. Humboldt-Universit?t zu Berlin 3. Russian Academy of Sciences Institute for High Pressure Physics Russian Academy of Sciences Lebedev Physics Institute
出 版 物：《Advanced Photonics》 (先进光子学(英文))
年 卷 期：2019年第1卷第6期
页 面：22-28页
核心收录：
学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学]
基 金：Bundesministerium für Bildung und Forschung (BMBF)(NANO-FILM) Australian Research Council(ARC)(DP180100077, DP190101058, and DE180100810) the Russian Science Foundation,Grant No. 19-12-00407 for financial support
主 题：Neodymium Quantum efficiency Color centers Diamond Polymethylmethacrylate Germanium Dielectrics Glasses Photonics Interfaces
摘 要：Color centers in diamond—especially group Ⅳ defects—have been advanced as a viable solidstate platform for quantum photonics and information technologies. We investigate the photodynamics and characteristics of germanium-vacancy(GeV) centers hosted in high-pressure high-temperature diamond nanocrystals. Through back-focal plane imaging, we analyze the far-field radiation pattern of the investigated emitters and derive a crossed-dipole emission, which is strongly aligned along one axis. We use this information in combination with lifetime measurements to extract the decay rate statistics of the GeV emitters and determine their quantum efficiency, which we estimated to be ～(22 ± 2)%. Our results offer further insight into the photodynamic properties of the GeV center in nanodiamonds and confirm its suitability as a desirable system for quantum technologies.
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