Two-Photon Luminescence of Single Colloidal Gold Nanorods

Revealing the Origin of Plasmon Relaxation in Small Nanocrystals

Céline Molinaro, Y. El Harfouch, E. Palleau, F. Eloi, S. Marguet, L. Douillard, F. Charra, C. Fiorini-Debuisschert

Research output: Contribution to journalArticle

Abstract

The two-photon luminescence (TPL) of small 10 nm × 40 nm colloidal gold nanorods (GNR) is investigated at the single object level, combining polarization-resolved TPL and simultaneously acquired topography. A very high dependence of the TPL signal with both the nanorods longitudinal axis and the incident wavelength is observed, confirming the plasmonic origin of the signal and pointing to the limit of the analogy between GNRs and molecules. The maximum two-photon brightness of a single GNR is measured to be a few millions higher than the two-photon brightness of fluorescein molecules. The spectral analysis of the TPL evidence two emission bands peaks: in the visible (in direct connection with the gold band structure) and in the infrared (IR). In both bands, the TPL signal is observed to vary quadratically with the excitation beam; the signal emitted in either the visible or the IR exhibits, however, different polarization properties. We show that the important TPL observed in these small gold nanorods results from resonance effects both at the excitation and emission level: local field enhancement at the longitudinal surface plasmon resonances (LSPR) first results in an increase of the electron–hole generation. Further relaxation of electron–hole pairs then mostly leads to the excitation of the GNR transverse plasmon mode and its subsequent radiative relaxation.
Original languageEnglish
Pages (from-to)23136-23143
Number of pages8
JournalJournal of Physical Chemistry C
Volume120
Issue number40
DOIs
Publication statusPublished - 2016
Externally publishedYes

Fingerprint

Gold Colloid
Nanorods
Nanocrystals
nanorods
Luminescence
nanocrystals
Photons
Gold
luminescence
gold
photons
Luminance
brightness
Polarization
excitation
Infrared radiation
Molecules
Surface plasmon resonance
polarization
Fluorescein

Cite this

Molinaro, Céline ; El Harfouch, Y. ; Palleau, E. ; Eloi, F. ; Marguet, S. ; Douillard, L. ; Charra, F. ; Fiorini-Debuisschert, C. / Two-Photon Luminescence of Single Colloidal Gold Nanorods : Revealing the Origin of Plasmon Relaxation in Small Nanocrystals. In: Journal of Physical Chemistry C. 2016 ; Vol. 120, No. 40. pp. 23136-23143.
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abstract = "The two-photon luminescence (TPL) of small 10 nm × 40 nm colloidal gold nanorods (GNR) is investigated at the single object level, combining polarization-resolved TPL and simultaneously acquired topography. A very high dependence of the TPL signal with both the nanorods longitudinal axis and the incident wavelength is observed, confirming the plasmonic origin of the signal and pointing to the limit of the analogy between GNRs and molecules. The maximum two-photon brightness of a single GNR is measured to be a few millions higher than the two-photon brightness of fluorescein molecules. The spectral analysis of the TPL evidence two emission bands peaks: in the visible (in direct connection with the gold band structure) and in the infrared (IR). In both bands, the TPL signal is observed to vary quadratically with the excitation beam; the signal emitted in either the visible or the IR exhibits, however, different polarization properties. We show that the important TPL observed in these small gold nanorods results from resonance effects both at the excitation and emission level: local field enhancement at the longitudinal surface plasmon resonances (LSPR) first results in an increase of the electron–hole generation. Further relaxation of electron–hole pairs then mostly leads to the excitation of the GNR transverse plasmon mode and its subsequent radiative relaxation.",
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Molinaro, C, El Harfouch, Y, Palleau, E, Eloi, F, Marguet, S, Douillard, L, Charra, F & Fiorini-Debuisschert, C 2016, 'Two-Photon Luminescence of Single Colloidal Gold Nanorods: Revealing the Origin of Plasmon Relaxation in Small Nanocrystals', Journal of Physical Chemistry C, vol. 120, no. 40, pp. 23136-23143. https://doi.org/10.1021/acs.jpcc.6b07498

Two-Photon Luminescence of Single Colloidal Gold Nanorods : Revealing the Origin of Plasmon Relaxation in Small Nanocrystals. / Molinaro, Céline; El Harfouch, Y.; Palleau, E.; Eloi, F.; Marguet, S.; Douillard, L.; Charra, F.; Fiorini-Debuisschert, C.

In: Journal of Physical Chemistry C, Vol. 120, No. 40, 2016, p. 23136-23143.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Two-Photon Luminescence of Single Colloidal Gold Nanorods

T2 - Revealing the Origin of Plasmon Relaxation in Small Nanocrystals

AU - Molinaro, Céline

AU - El Harfouch, Y.

AU - Palleau, E.

AU - Eloi, F.

AU - Marguet, S.

AU - Douillard, L.

AU - Charra, F.

AU - Fiorini-Debuisschert, C.

PY - 2016

Y1 - 2016

N2 - The two-photon luminescence (TPL) of small 10 nm × 40 nm colloidal gold nanorods (GNR) is investigated at the single object level, combining polarization-resolved TPL and simultaneously acquired topography. A very high dependence of the TPL signal with both the nanorods longitudinal axis and the incident wavelength is observed, confirming the plasmonic origin of the signal and pointing to the limit of the analogy between GNRs and molecules. The maximum two-photon brightness of a single GNR is measured to be a few millions higher than the two-photon brightness of fluorescein molecules. The spectral analysis of the TPL evidence two emission bands peaks: in the visible (in direct connection with the gold band structure) and in the infrared (IR). In both bands, the TPL signal is observed to vary quadratically with the excitation beam; the signal emitted in either the visible or the IR exhibits, however, different polarization properties. We show that the important TPL observed in these small gold nanorods results from resonance effects both at the excitation and emission level: local field enhancement at the longitudinal surface plasmon resonances (LSPR) first results in an increase of the electron–hole generation. Further relaxation of electron–hole pairs then mostly leads to the excitation of the GNR transverse plasmon mode and its subsequent radiative relaxation.

AB - The two-photon luminescence (TPL) of small 10 nm × 40 nm colloidal gold nanorods (GNR) is investigated at the single object level, combining polarization-resolved TPL and simultaneously acquired topography. A very high dependence of the TPL signal with both the nanorods longitudinal axis and the incident wavelength is observed, confirming the plasmonic origin of the signal and pointing to the limit of the analogy between GNRs and molecules. The maximum two-photon brightness of a single GNR is measured to be a few millions higher than the two-photon brightness of fluorescein molecules. The spectral analysis of the TPL evidence two emission bands peaks: in the visible (in direct connection with the gold band structure) and in the infrared (IR). In both bands, the TPL signal is observed to vary quadratically with the excitation beam; the signal emitted in either the visible or the IR exhibits, however, different polarization properties. We show that the important TPL observed in these small gold nanorods results from resonance effects both at the excitation and emission level: local field enhancement at the longitudinal surface plasmon resonances (LSPR) first results in an increase of the electron–hole generation. Further relaxation of electron–hole pairs then mostly leads to the excitation of the GNR transverse plasmon mode and its subsequent radiative relaxation.

U2 - 10.1021/acs.jpcc.6b07498

DO - 10.1021/acs.jpcc.6b07498

M3 - Article

VL - 120

SP - 23136

EP - 23143

JO - Journal of physical chemistry. C

JF - Journal of physical chemistry. C

SN - 1932-7447

IS - 40

ER -