A New Look at Grating Theories Through the Extraordinary Optical Transmission Phenomenon
The electromagnetic properties of subwavelength metallic surfaces are due to two kinds of elementary distinct waves: the famous surface plasmon polariton and the quasi-cylindrical wave, which are both scattered by the subwavelength indentations as they propagate on the metal. The ab initio microscopic description of the electromagnetic properties starting from the sole knowledge of the elementary waves launched in between the indentation has a long history in grating theories. We review the evolution of the ideas and the fundamental principles that govern these waves and their impacts. For the sake of illustration, the emblematic case of a metal surface perforated by a subwavelength-hole array, which exhibits remarkable transmission properties, is taken to illustrate our purpose.
KeywordsLeaky Mode Frequency Selective Surface Elementary Wave Extraordinary Optical Transmission Rigorous Couple Wave Analysis
Haitao Liu acknowledges financial supports from the Natural Science Foundation of China (No. 10804057), from the Cultivation Fund of the Key Scientific and Technical Innovation Project, Ministry of Education of China (No. 708021), and from the Program for New Century Excellent Talents in University (No. NCET-08-0289). Jean Paul Hugonin and Pierre Chavel are acknowledged for fruitful discussions and for careful readings of the manuscript.
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