15-20 June 2014
Laurentian University / Université Laurentienne
America/Toronto timezone
Welcome to the 2014 CAP Congress! / Bienvenue au congrès de l'ACP 2014!

Resonant Nanoantennas for Long-Wavelength Spectroscopy

19 Jun 2014, 09:30
30m
C-206 (Laurentian University / Université Laurentienne)

C-206

Laurentian University / Université Laurentienne

Sudbury, Ontario
Invited Speaker / Conférencier invité Division of Atomic, Molecular and Optical Physics, Canada / Division de la physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC) (R1-2) Plasmonics - DAMOPC-DCMMP / Plasmonique - DPAMPC-DPMCM

Speaker

Prof. Luca Razzari (INRS-EMT)

Description

Optical nanoantennas are nano-fabricated devices able to convert free-space optical radiation into localized energy. Due to this, they can be used to enhance the electromagnetic field and to localize it on a scale well beyond the diffraction limit. Nanoantennas have thus become key elements for single-molecule spectroscopy, nano-imaging and extreme nonlinear optics [1-3]. Our aim is to exploit these concepts in the long-wavelength region (mid-infrared – MIR, and terahertz – THz) of the electromagnetic spectrum. I will present a summary of the results we have recently obtained [4-6] regarding arrays of planar THz nanoantennas as well as gold MIR nanocones. In particular, the resonance tunability of these structures, their near- and far-field response, and their field enhancement capabilities will be shown. Finally, a practical demonstration of the use of these nanoplasmonic structures for enhanced spectroscopy of nano-objects will be given. References [1] P. Bharadwaj et al., Chem. Sci. 2, 136-140 (2011); [2] F. De Angelis et al., Nature Nanotech. 5, 67-72 (2010); [3] S. Kim et al., Nature 453, 757-760 (2008); [4] L. Razzari et al., Opt Express 19, 26088-26094 (2011); [5] L. Razzari et al., Plasmonics 8, 133 (2013); [6] S. Tuccio et al., Opt. Lett. 39, 571 (2014).

Primary author

Prof. Luca Razzari (INRS-EMT)

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