Large scale fabrication of nitrogen vacancy-embedded diamond nanostructures for single-photon source applications
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2016-11-01 |
| Journal | Chinese Physics B |
| Authors | Qianqing Jiang, Wuxia Li, Chengchun Tang, Yanchun Chang, Tingting Hao |
| Institutions | Aston University, Collaborative Innovation Center of Quantum Matter |
| Citations | 15 |
Abstract
Section titled āAbstractāColor centers in diamond are prominent candidates to generate and manipulate quantum states of light, even at room temperature.However, the efficiency of photon collection efficiency in bulk diamond is greatly reduced by the refraction at diamond/air interface.To address this issue, arrays of diamond nanostructures of different diameters and top end shapes have been fabricated with HSQ, PMMA and Cr as the etching masks, towards large scale fabrication of nitrogen vacancy (NV) embedded diamond single photon sources with enhanced collection efficiency.With mixture of O 2 and CHF 3 gas plasma, diamond pillars with diameter down to 45 nm have been achieved.The top end shape evolution has also been traced with a simple model.The tests of size dependent single photon properties confirmed a best single photon collection efficiency enhancement with a factor larger than ten folds and a mild decreasing of the decoherence time with the reduction of the pillar diameter was observed as expected.These results provide useful information in future applications of nanostructured diamond as single photon sources.