Far-field disentanglement of modes in hybrid plasmonic-photonic crystals by fluorescence nano-reporters

Nanophotonics

article

Simona Ungureanu¹  Branko Kolaric²  Jianing Chen³  Rainer Hillenbrand³  Renaud A. L. Vallée¹ 

[1] University Bordeaux;Laboratoire Interfaces and Fluides Complexes, Centre d’Innovation et de Recherche en Matériaux Polymères, Université de Mons;CIC nanoGUNE Consolider;IKERBASQUE, Basque Foundation for Science

关键词: plasmonic crystal;    fluorescence lifetime;    surface plasmon resonance;    Bloch modes;    Purcell effect;    PACS number 73.20.Mf;   

DOI  :  10.1515/nanoph-2013-0004

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

In this paper, the resonance modes exhibited by a hybrid nanostructure have been disentangled in the far-field owing to narrow-band fluorescence nano-reporters. Hybrid plasmonic-photonic crystals were fabricated using large (457 nm) monodisperse polystyrene spheres self-assembled into 2D photonic crystals and subsequently coated by a 30 nm thick silver layer. Such structures exhibit a complex resonance pattern, which has been elucidated owing to numerical simulations and electric near-field patterns obtained with a scattering type scanning near-field optical microscope (s-SNOM). For the sake of disentangling the resonance modes of the hybrid structure in the far-field, different types of semiconductor quantum dots (QDs), acting as nano-reporters of the local interactions, were dispersed on top of distinct structures. Depending on the relative overlap of the emission spectrum of a particular type of QDs with the resonance features of the hybrid structure, we affect their emission rate in a unique way, as a consequence of the complex interaction occurring between the plasmo-photonic modes and the excitons. Such plasmonic structures appear to be particularly relevant for fluorescence-based sensing devices.

【 授权许可】

CC BY