Article (Scientific journals)
Two-Photon Luminescence of Gold Nanorods Mediated by Higher Order Plasmon Modes
Verellen, Niels; Denkova, Denitza; De Clercq, Ben et al.
2015In ACS Photonics, 2, p. 410
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Keywords :
nanoantenna; surface plasmon resonance; two photon luminescence
Abstract :
[en] Metallic nanorod antennas can be considered as an analogue to classical half-wave dipole antennas, constituting an important tool for manipulating linear and nonlinear lightmatter interactions in nanoscale volumes. Using two-photon luminescence (TPL) scanning laser microscopy, we investigate such optical antennas beyond their fundamental dipole mode. The antenna mode dispersion is extracted from the nonlinear TPL measurement and reveals a TPL process that is dominated by plasmon-induced enhancement of the two photon absorption in the metal. Additionally, a clear signature of the mode parity is observed in the TPL images. TPL maxima are observed outside the antenna boundaries for even parity modes, whereas they are located inside for odd modes. It is concluded that for even modes the two-photon luminescence emission is strongly mediated by retardation of the excitation field, a consequence of their zero net-dipole moment. This selective excitation of different mode parities is highly relevant for nanoscale enhanced nonlinear optics, as well as plasmonic nanosensor applications and tuning of radiative properties of quantum emitters.
Disciplines :
Physics
Author, co-author :
Verellen, Niels;  Katholieke Universiteit Leuven - KUL
Denkova, Denitza;  Katholieke Universiteit Leuven - KUL
De Clercq, Ben;  Universiteit Hasselt - UH
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Ameloot, Marcel;  Universiteit Hasselt - UH
Van Dorpe, Pol;  Katholieke Universiteit Leuven - KUL
Moshchalkov, Victor;  Katholieke Universiteit Leuven - KUL
Language :
English
Title :
Two-Photon Luminescence of Gold Nanorods Mediated by Higher Order Plasmon Modes
Publication date :
23 February 2015
Journal title :
ACS Photonics
eISSN :
2330-4022
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
2
Pages :
410
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 March 2015

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