Design of a new photonic/plasmonic microcavity allowing a strong light-matter interaction

Author

Conteduca, D. ; Dell´Olio, F. ; Ciminelli, C. ; Krauss, Thomas F. ; Armenise, M.N.

Author_Institution

Optoelectron. Lab., Politec. di Bari, Bari, Italy

fYear

2014

fDate

7-9 May 2014

Firstpage

1

Lastpage

3

Abstract

We present a novel configuration of photonic/plasmonic microcavity with a 1D photonic crystal cavity (PhC) vertically coupled to a metal slot. A strong light-matter interaction is allowed, due to a strong photons confinement in the metal slot, which corresponds to a low mode volume (V = 2×10^-3 (λ/n)³). A Q-factor of 2.6×10³ has been obtained, providing a ultra-high Q/V = 1.3×10⁶ (λ/n)^-3, with a resonance transmission of 48 % λ = 1563.70 nm. Accurate 3D Finite Element Method (FEM) simulations have been performed to design the cavity. Optical trapping has been identified as the most suitable application for the proposed device, due to a strong gradient of the light field in the metal slot that allows high values of optical force and, consequently, the ability to trap nanoparticle with a diameter less than 100 nm.

Keywords

Q-factor; finite element analysis; microcavities; nanoparticles; optical design techniques; photonic crystals; plasmonics; radiation pressure; 1D photonic crystal cavity; 3D finite element method; FEM; PhC; Q-factor; light-matter interaction; nanoparticle trap; optical trapping; photonic/plasmonic microcavity design; resonance transmission; wavelength 1563.70 nm; Biomedical optical imaging; Cavity resonators; Metals; Optical devices; Photonics; Plasmons; Q-factor; Light-matter interaction; Optical trapping; Photonic crystal cavity; Plasmonic slot;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics Conference, 2014 Third Mediterranean

Conference_Location

Trani

Type

conf

DOI

10.1109/MePhoCo.2014.6866470

Filename

6866470