Time-Resolved Photoluminescence in Gold Nanoantennas

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SAKAT, Emilie, Ilaria BARGIGIA, Michele CELEBRANO, Andrea CATTONI, Stéphane COLLIN, Daniele BRIDA, Marco FINAZZI, Cosimo D’ANDREA, Paolo BIAGIONI, 2016. Time-Resolved Photoluminescence in Gold Nanoantennas. In: ACS Photonics. 3(8), pp. 1489-1493. ISSN 2330-4022. eISSN 2330-4022. Available under: doi: 10.1021/acsphotonics.6b00039

@article{Sakat2016-08-17TimeR-34930, title={Time-Resolved Photoluminescence in Gold Nanoantennas}, year={2016}, doi={10.1021/acsphotonics.6b00039}, number={8}, volume={3}, issn={2330-4022}, journal={ACS Photonics}, pages={1489--1493}, author={Sakat, Emilie and Bargigia, Ilaria and Celebrano, Michele and Cattoni, Andrea and Collin, Stéphane and Brida, Daniele and Finazzi, Marco and D’Andrea, Cosimo and Biagioni, Paolo} }

Finazzi, Marco Cattoni, Andrea Finazzi, Marco Cattoni, Andrea D’Andrea, Cosimo Biagioni, Paolo 2016-08-17 Sakat, Emilie We present spectrally and time-resolved measurements of one-photon and multiphoton photoluminescence from gold nanoantenna arrays. In the literature, very different emission decay rates have been observed: while some authors find a very short decay rate (<50 fs), others report the presence of long-lived components (from a few picoseconds up to a few nanoseconds). Accordingly, different interpretations of the related physical mechanisms have been tentatively drawn. Our work demonstrates a decay rate of less than 500 fs (as limited by our temporal resolution) in the weak-perturbation regime, which can increase up to a few picoseconds with higher excitation fluences. This confirms that the decay dynamics of the photoluminescence process is influenced by electron thermalization in the conduction band, especially at higher excitation fluences for which high temperatures of the electron gas are reached. On the contrary, no experimental evidence of longer-lived nanosecond components is observed. eng D’Andrea, Cosimo Celebrano, Michele Collin, Stéphane Celebrano, Michele Bargigia, Ilaria 2016-08-03T14:42:44Z Bargigia, Ilaria Sakat, Emilie Time-Resolved Photoluminescence in Gold Nanoantennas Collin, Stéphane 2016-08-03T14:42:44Z Brida, Daniele Brida, Daniele Biagioni, Paolo

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