Invertible Nanocup Array Supporting Hybrid Plasmonic Resonances. Issue 6 (2nd March 2016)

• Record Type: Journal Article
• Authors: Wang, Limin; Ai, Bin; Möhwald, Helmuth; Yu, Ye; Zhang, Gang
• Is Part Of: Advanced optical materials. Volume 4:Issue 6(2016:Jun.)
• Page Start: 906
• Page End: 916
• Publication Date: 2016-03-02
• Subjects: colloidal lithography -- hybrid plasmonic resonances -- nanocup arrays -- surface plasmonic resonances; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.201500737
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract : Continuous inverse nanocup array films are fabricated utilizing a simple and efficient colloidal lithography method. The structured films further can be easily transferred to arbitrary substrates and laid upside down during transfer. The topologically continuous film consisted of a frustum‐like void core surrounded by a concentric metal shell. The unique structure with a cavity element provides hybrid plasmonic resonances coupling between frustum‐like mode and void‐like surface plasmon (SP) mode, leading to a greatly enhanced SP energy, which largely improves plasmonic sensing and surface enhanced Raman scattering performance. Moreover, the existence of hybrid modes induces distinct electric field distributions inside and outside the nanocup, allowing the structured film to act as a spatial selective sensor. Abstract : The fabricated Ag nanocup array films can enable a hybrid plasmonic resonance, leading to a greatly enhanced surface plasmon energy, which largely improves plasmonic sensing and surface enhanced Raman scattering performance. Moreover, the hybrid mode induces distinct electric field distributions inside and outside the nanocup, allowing the structured film to be utilized as a spatial selective sensor.