Active control of radiation beaming from Tamm nanostructures by optical microscopy

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 fluoresce...

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Bibliographic Details
Published in:New Journal of Physics
Main Authors: Fu Feng, Clémentine Symonds, Catherine Schwob, Joël Bellessa, Agnès Maître, Jean-Paul Hugonin, Laurent Coolen
Format: Article
Language:English
Published: IOP Publishing 2018-01-01
Subjects:
optical Tamm structure
nanocrystals
emission pattern control
Online Access:https://doi.org/10.1088/1367-2630/aaaf93
Description
Summary: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.
ISSN:1367-2630

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