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

单分子有机物如二苯并三萘（DBT）是一种优良的固态单光子源。它们的发射波长与铷中的电子跃迁（780 - 795 nm）一致，并且在低温下的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，但该分子也具有更长寿命的三重态，这可能有助于量子态存储和操纵。在这个博士项目中，我将研究利用静电场（斯塔克效应）和压电基片施加的应变对DBT分子发射的集成调谐。我将展示DBT发射可以被调谐到与铷原子的界面，并且光子对源可以被构建来干扰这种DBT发射。我将对DBT分子进行光谱分析，以找到更高的单重态跃迁和三重态跃迁，并将其与量子化学计算进行比较，然后使用这些知识将一个DBT分子的光子存储在另一个DBT分子的三重态中。

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.