Active control of radiation beaming from Tamm nanostructures by optical microscopy. (28th March 2018)

• Record Type: Journal Article
• Authors: Feng, Fu; Symonds, Clémentine; Schwob, Catherine; Bellessa, Joël; Maître, Agnès; Hugonin, Jean-Paul; Coolen, Laurent
• Is Part Of: New journal of physics. Volume 20:Number 3(2018:Mar.)
• Publication Date: 2018-03-28
• Subjects: optical Tamm structure -- nanocrystals -- emission pattern control; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/aaaf93
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: Active control of the radiation orientation (beaming) of a metallic antenna has been reported by various methods, where the antenna excitation position was tuned with a typical 50 nm precision by a near-field tip or an electron-beam. Here we use optical microscopy to excite and analyze the fluorescence of a layer of nanocrystals embedded in an optical Tamm state nanostructure (metallic disk on top of a Bragg mirror). We show that the radiation pattern can be controlled by changing the excitation spot on the disk with only micrometer precision, in a manner which can be well described by numerical simulations. A simplified analytical model suggests that the propagation length of the in-plane confined optical modes is a key parameter for beaming control.