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Experimental study of unidirectional excitation of SPPs by binary area-coded nanohole arrays
- Source :
- Chinese Optics Letters; August 2014, Vol. 12 Issue: 8 p082401
- Publication Year :
- 2014
-
Abstract
- We present an experimental study on a unidirectional surface plasmon polariton (SPP) launcher based on a compact binary area-coded nanohole array, where the symmetry breaking is realized via effective-index modulation in the binary pattern of the gold film, thus avoiding the challenge of modulating nanostructure in its depth. It is shown that SPPs can be unidirectionally and effectively excited at normal incidence. The SPP intensity and asymmetric excitation ratio, which are two key figure-of-merits of SPP launchers, can be improved by increasing the number of array rows. The proposed device is compatible with most mature top-town nanofabrication techniques and thus is perspective for low-cost mass production.
Details
- Language :
- English
- ISSN :
- 16717694
- Volume :
- 12
- Issue :
- 8
- Database :
- Supplemental Index
- Journal :
- Chinese Optics Letters
- Publication Type :
- Periodical
- Accession number :
- ejs33463907