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Journal Article
Self-Aligned Deterministic Coupling of Single Quantum Emitter to Nanofocused Plasmonic Modes
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- Authors
- Su-Hyun Gong, Je-Hyung Kim, Young-Ho Ko, Christophe Rodriguez, Jonghwa Shin, Yong-Hee Lee, Le Si Dang, Xiang Zhang, Yong-Hoon Cho
- Issue Date
- 2015-04
- Citation
- Proceedings of the National Academy of Sciences of the United States of America, v.112, no.17, pp.5280-5285
- ISSN
- 0027-8424
- Publisher
- National Academy of Sciences
- Language
- English
- Type
- Journal Article
- Abstract
- The quantum plasmonics field has emerged and been growing increasingly, including study of single emitter-light coupling using plasmonic system and scalable quantum plasmonic circuit. This offers opportunity for the quantum control of light with compact device footprint. However, coupling of a single emitter to highly localized plasmonic mode with nanoscale precision remains an important challenge. Today, the spatial overlap between metallic structure and single emitter mostly relies either on chance or on advanced nanopositioning control. Here, we demonstrate deterministic coupling between three-dimensionally nanofocused plasmonic modes and single quantum dots (QDs) without any positioning for single QDs. By depositing a thin silver layer on a site-controlled pyramid QD wafer, three-dimensional plasmonic nanofocusing on each QD at the pyramid apex is geometrically achieved through the silver-coated pyramid facets. Enhancement of the QD spontaneous emission rate as high as 22 짹 16 is measured for all processed QDs emitting over ~150-meV spectral range. This approach could apply to high fabrication yield on-chip devices for wide application fields, e.g., high-efficiency light-emitting devices and quantum information processing.
- KSP Keywords
- Application fields, As 2, Compact device, Metallic structure, On-chip, Plasmonic mode, Quantum Control, Quantum Dot(QD), Quantum information processing, Single emitter, Single quantum dots