Posted on 3/6/2017
Latest article published and entitled: 'Plasmon–emitter interaction using integrated ring grating–nanoantenna structures.' by N. Rahbany, W. Geng, R. Bachelot, & C. Couteau in Nanotechnology 28, 185201 (2017).
Here is the abstract :
Overcoming the diffraction limit to achieve high optical resolution is one of the main challenges in the fields of plasmonics, nanooptics and nanophotonics. In this work, we introduce novel plasmonic structures consisting of nanoantennas (nanoprisms, single bowtie nanoantennas and double bowtie nanoantennas) integrated in the center of ring diffraction gratings. Propagating surface plasmon polaritons (SPPs) are generated by the ring grating and coupled with localized surface plasmons (LSPs) at the nanoantennas exciting emitters placed in their gap. SPPs are widely used for optical waveguiding but provide low resolution due to their weak spatial confinement. In contrast, LSPs provide excellent sub-wavelength confinement but induce large losses. The phenomenon of SPP–LSP coupling witnessed in our structures allows for achieving more precise focusing at the nanoscale, causing an increase in the fluorescence emission of the emitters. Finite-difference time-domain simulations as well as experimental fabrication and optical characterization results are presented to study plasmon–emitter coupling between an ensemble of dye molecules and our integrated plasmonic structures. A comparison is given to highlight the importance of each structure on the photoluminescence and radiative decay enhancement of the molecules.
2017 CLEO Pacific Rim Conference
31 July-04 August 2017
Single Photons Single Spins II
(SPSSII) Meeting, University of Technology of Troyes,
29 August-01 September 2017.
15th International Conference on Near-Field Optics, Nanophotonics and related techniques (NFO15),
University of Technology of Troyes,
26-30 August 2018.
COST Nanoscale Quantum Optics (NQO)