상세정보
학술지
Self-Aligned Deterministic Coupling of Single Quantum Emitter to Nanofocused Plasmonic Modes
- 저자
- 공수현, 김제형, 고영호, Christophe Rodriguez, 신종화, 이용희, Le Si Dang, Xiang Zhang, 조용훈
- 발행일
- 201504
- 출처
- Proceedings of the National Academy of Sciences of the United States of America, v.112 no.17, pp.5280-5285
- ISSN
- 0027-8424
- 출판사
- National Academy of Sciences
- 협약과제
- 15MB1200, 소프트웨어 정의 네트워크(SDN) 기반 Flexible 광노드 핵심기술 개발, 권용환
- 초록
- 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 제안 키워드
- Application fields, As 2, Compact device, Light emitting device, Metallic structure, On-chip, Plasmonic mode, Quantum Control, Quantum Dot(QD), Quantum information processing, Single emitter