Efficient stray-light suppression for resonance fluorescence in quantum dot micropillars using self-aligned metal apertures

Efficient stray-light suppression for resonance fluorescence in quantum dot micropillars using self-aligned metal apertures
复制标题

使用自对准金属孔径有效抑制量子点微柱中的共振荧光杂散光

DOI:
10.1088/0268-1242/31/9/095007
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发表时间:
2016
影响因子:
1.9
通讯作者:
S. Reitzenstein
S. Reitzenstein
中科院分区:
工程技术4区
文献类型:
--
作者:
C. Hopfmann;A. Musiał;S. Maier;M. Emmerling;C. Schneider;S. Höfling;M. Kamp;S. Reitzenstein

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在这项工作中,我们提出并展示了一种在量子点微柱共振荧光实验中有效抑制激发激光杂散光的技术方法。为了确保有效地抑制杂散光,它们的制造过程包括一个平坦化步骤,随后用钛掩膜覆盖,以在微柱位置制造自对准的孔。这些孔径的目的是在侧面激发垂直检测配置中限制激光杂散光,同时通过微柱的顶面检测光信号。在一项统计研究中,我们确定并比较了48根有金属孔和没有金属孔的微柱的杂散光抑制效果,证明了这些孔的有益效果,并对其进行了定量评估。单量子点与腔模式耦合的实际共振荧光实验证明了所提出方法的相关性,并表明它将促进相干光激发下腔量子电动力学现象的进一步研究。
Within this work we propose and demonstrate a technological approach to efficiently suppress excitation laser stray-light in resonance fluorescence experiments on quantum dot micropillars. To ensure efficient stray-light suppression, their fabrication process includes a planarization step and subsequent covering with a titanium mask to fabricate self-aligned apertures at the micropillar positions. These apertures aim to limit laser stray-light in the side-excitation vertical-detection configuration, while enabling detection of the optical signal through the top facet of the micropillars. The beneficial effects of these apertures are proven and quantitatively evaluated within a statistical study in which we determine and compare the stray-light suppression of 48 micropillars with and without metal apertures. Actual resonance fluorescence experiments on single quantum dots coupled to the cavity mode prove the relevance of the proposed approach and demonstrate that it will foster further studies on cavity quantum electrodynamics phenomena under coherent optical excitation.
微腔中具有量子点的量子光学
DOI: --
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期刊:
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