Hybrid light-matter interfaces for linking molecules and atoms with photons

用光子连接分子和原子的混合光-物质界面

• 批准号: 2266128
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2266128
• 关键词: Hybrid; light; matter; interfaces; linking

Single organic molecules such as dibenzoterrylene (DBT) are excellent solid-state sources of singlephotons. Their emission wavelength coincides with electronic transitions in rubidium (780 - 795 nm)and emission linewidths at low temperature reach the lifetime limit (40 MHz). While the singlet state ofDBT has these good single photon emission properties, the molecule also has a longer-lived tripletstate, which could be useful for quantum state storage and manipulation. In this PhD project I willinvestigate the integrated tuning of DBT molecule emission using static electric fields (Stark effect)and strain applied using piezoelectric substrates. I will show that DBT emission can be tuned tointerface with rubidium atoms, and that photon-pair sources can be built to interfere with such DBTemission. I will perform spectroscopy of DBT molecules to find higher lying singlet transitions andtriplet transitions, and compare this to quantum chemistry calculations, before using this knowledge tostore photons from one DBT molecule in the triplet state of another.

单一的有机分子，如二苯并四氢呋喃(DBT)，是产生单光子的极好的固态光源。它们的发射波长与Rb中的电子跃迁(780-795 nm)相吻合，在低温下发射线宽达到寿命极限(40 MHz)。虽然DBT的单重态具有这些良好的单光子发射特性，但该分子还具有较长的三重态寿命，这可能有助于量子态的存储和操纵。在这个博士项目中，我将研究利用静电场(斯塔克效应)和使用压电衬底施加的应变来集成调谐DBT分子发射。我将展示DBT发射可以被调谐到与Rb原子的界面，并且可以建立光子对光源来干扰这种DBT发射。我将对DBT分子进行光谱分析，以找到位于更高位置的单态和三态跃迁，并将其与量子化学计算进行比较，然后使用这些知识来存储来自一个DBT分子的三重态的光子。