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Broadband light generation from Au-Al2O3-Al sub-10 nm plasmonic gap structures

Abstract

We demonstrate broadband photoluminescence (PL) from a Au nanorod-alumina-Al substrate (Au-Al2O3-Al) sandwich structure under a peak excitation power intensity of 1.45–2.61 GW/cm2. The emission wavelength is in the range of 450–1050 nm and the lifetime is on the sub-nanosecond timescale. Comparative studies of the PL from Au-Al2O3-Al with different Au rod lengths and Au-Al2O3 without Al coupling layer, together with the finite difference time domain (FDTD) calculations, show that the PL from Au-Al2O3-Al originates from the surface plasmon enhanced supercontinuum (SC) generation in the Al2O3 membrane. This observation indicates that SC could be realized in nanoscale plasmonic structures, which has promising applications in the minimization and integration of light sources in photonic devices.

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Publication details

The article was received on 18 Apr 2017, accepted on 13 Jun 2017 and first published on 15 Jun 2017


Article type: Paper
DOI: 10.1039/C7TC01683B
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Broadband light generation from Au-Al2O3-Al sub-10 nm plasmonic gap structures

    L. Yao, Z. Ma, X. Song, X. Xiao, X. Wang, N. Zhou, T. Zhai, J. zhang and J. Han, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC01683B

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