Near-field probing of slow Bloch modes on photonic crystals with a nanoantenna | Zendy

T.-Ph. Vo | Zendy; Mathieu Mivelle | Zendy; Ségolène Callard | Zendy; Adel Rahmani | Zendy; F.I. Baida | Zendy; D. Charraut | Zendy; Ali Belarouci | Zendy; Dušan Nedeljković | Zendy; C. Seassal | Zendy; Geoffrey W. Burr | Zendy; Thierry Grosjean | Zendy

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Near-field probing of slow Bloch modes on photonic crystals with a nanoantenna

Author(s) -

T.-Ph. Vo,

Mathieu Mivelle,

Ségolène Callard,

Adel Rahmani,

F.I. Baida,

D. Charraut,

Ali Belarouci,

Dušan Nedeljković,

C. Seassal,

Geoffrey W. Burr,

Thierry Grosjean

Publication year - 2012

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.20.004124

Subject(s) - optics , near field scanning optical microscope , materials science , polarization (electrochemistry) , lasing threshold , near and far field , photonic crystal fiber , nanophotonics , photonic crystal , photonics , laser , optoelectronics , optical fiber , physics , optical microscope , scanning electron microscope , chemistry

We study the near-field probing of the slow Bloch laser mode of a photonic crystal by a bowtie nano-aperture (BNA) positioned at the end of a metal-coated fiber probe. We show that the BNA acts as a polarizing nanoprobe allowing us to extract information about the polarization of the near-field of the slow-light mode, without causing any significant perturbation of the lasing process. Near-field experiments reveal a spatial resolution better than λ/20 and a polarization ratio as strong as 110. We also demonstrate that the collection efficiency is two orders of magnitude larger for the BNA than for a 200 nm large circular aperture opened at the apex of the same metal-coated fiber tip. The BNA allows for overcoming one of the main limitations of SNOM linked to the well-known trade off between resolution and signal-to-noise ratio.

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