Rigorous design of an ultra-high Q/V photonic/plasmonic cavity to be used in biosensing applications

被引：34
作者：
Conteduca, D. [1 ]
Dell'Olio, F. [1 ]
Innone, F. [1 ]
Ciminelli, C. [1 ]
Armenise, M. N. [1 ]
机构：
[1] Politecn Bari, Optoelect Lab, I-70125 Bari, Italy
来源：
OPTICS AND LASER TECHNOLOGY | 2016年 / 77卷
关键词：
Ultra-high Q/V; Photonic crystal cavity; Plasmonic slot; Photonic/plasmonic cavity; PHOTONIC CRYSTAL; OPTICAL-PROPERTIES; WAVE-GUIDES; NANOPARTICLES; NANOCAVITY; RESONATOR;
D O I：
10.1016/j.optlastec.2015.08.016
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A hybrid device based on a 1D PhC dielectric cavity vertically coupled to a plasmonic slot is proposed for use in biosensing applications. Under efficient coupling conditions between the Bloch mode in the 1D PhC dielectric cavity and the surface plasmon polaritons mode in the metal slot, an ultra-high Q/V ratio (similar to 10(7)(lambda/n)(-3)) has been achieved with a remarkable resonance transmission T (=47%), due to high spectral and spatial confinement in the cavity. The rigorous design process of the cavity, including the influence of geometrical and physical parameters on its performance, has been carried out using the 3D Finite Element Method. A strong light-matter interaction was observed, making the photonic-plasmonic cavity suitable for biosensing and, in particular, for optical trapping of living matter at nanoscale, such as proteins and DNA sections, as required in several biomedical applications. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：151 / 161
页数：11
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