We demonstrate experimentally two-fold enhancement of the decay rate of NV° centers on diamond/Si substrate as opposed to a bare Si substrate. We link the decay enhancement to the interplay between the excitation of substrate modes and the presence of non-radiative decay channels. We show that the radiative decay rate can vary by up to 90% depending on the thickness of the diamond film.

中文翻译：

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金刚石薄膜上金刚石NV中心的衰减率增强

我们通过实验证明了金刚石 / Si 衬底上 NV° 中心衰减率的两倍增强，而不是裸 Si 衬底。我们将衰减增强与底物模式的激发和非辐射衰减通道的存在之间的相互作用联系起来。我们表明，根据金刚石薄膜的厚度，辐射衰减率可以变化高达 90%。