Probing Purcell enhancement in plasmonic nanoantennas by broadband luminescent Si quantum dots

Journal Article · Mon Jun 13 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4953829· OSTI ID:22590773

Sugimoto, Hiroshi; Yashima, Shiho; Furuta, Kenta; Inoue, Asuka; Fujii, Minoru ^[1]

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1. Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, Rokkodai, Nada, Kobe 657-8501 (Japan)

Colloidal silicon quantum dots (Si QDs) with a very broad photoluminescence (PL) band are proposed as a probe to monitor the Purcell enhancement in a plasmonic nanostructure. Si QDs placed on an arbitrary plasmonic nanostructure enable us to determine the Purcell enhancement factors in a broad spectral range (600–900 nm). As a proof-of-concept experiment, a layer of Si QDs is spin-coated on gold film-over nanosphere structures, and the Purcell enhancement is quantitatively determined from the analyses of the PL spectra and the decay rates. The method proposed in this work provides a facile approach to quantitatively measure the performance of plasmonic substrates for PL and Raman enhancements.

• OSTI ID: 22590773
• Journal Information: Applied Physics Letters, Vol. 108, Issue 24; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DECAY
FILMS
GOLD
LAYERS
PERFORMANCE
PHOTOLUMINESCENCE
PROBES
QUANTUM DOTS
SUBSTRATES